View allAll Photos Tagged mafikeng
Country: South Africa
Location: Mafikeng (near the border to Botswana)
Train: Botswana Rail BD217 + 214 with a Train from Mafikeng to Botswana
In Mafikeng in Südafrika kann man Botwsanische Loks erleben. Immerhin einmal im Leben, denn ob man da wegen der Eisenbahn hinfahren muss? Eher nicht.
Wir nahmen das Bild mit als wir in Südafrika eine grosse Runde drehten. Die Loks sahen wir im Bahnhof stehen und ein Zug aus Südafrika war auch gerade angekommen. Der Schluss lag nahe, dass die Loks mit dem Zug irgendwann zur Grenze aufmachen. Was dann auch nach einigem warten auf einer (ungemütlichen) Strassenbrücke geschah.
The theory with the GMAM garratts was they were the equivalent to 2 class 19D. So here we have triple headed Dollies in the form of 19D 2669 + GMAM 4074 between Nkonzo and Mjila on the climb from Creighton towards Donnybrook on 2 June 2007.
The GMAM is 100% authentic for this line but Natal was the one province that was devoid of the 19D in steam days. Although both classes were stationed together at numerous other places the only line I can think of where they ever regularly double headed was Mafikeng to Vryburg in the Northern Cape.
Natal, South Africa
SAR class 19D no 2644 was rebuilt in 1979 by mechanical engineer David Wardale as the test bed for the class 26 project. Like the Red Devil her main modifications were a gas producer firebox and twin lempor exhaust system. Her smoke box was extended and deflectors fitted to lift the low velocity exhaust clear of the cab.
By the time I was old enough to hold a camera the only place I ever saw her was standing dead at Krugersdorp. This image of her is a mock up using a slide of 19D no 2640 arriving at Knysna.
If you are interested her story is below.
Built by Krupp in 1938 she was poor steamer and as such was chosen as the test bed to prove the concept of the proposed modifications. Once completed she was capable of hauling loads 20% to 30% percent greater than her unmodified sisters with consumption of coal and water reduced by 20%. After an initial test period she was allocated to Mafikeng where she worked the line south to Vryburg and Kimberley till being retired from revenue service in 1984. Thereafter she was transferred to Millsite, Krugersdorp, to form part of the preserved collection allocated to that depot and was used occasionally on special workings.
In 1989 the railways sold her to the South African National Railway and Steam Museum (SANRASM). She was moved to their site in Randfontein which was not very secure nor did it provide any protection from the elements. As a result her condition deteriorated rapidly.
By the mid 2000s she had been completely stripped of all her components, to prevent their theft, and had been standing in the open for 15 years. At around the same time the illegal cutting up of locomotives under SANRASM’s care was becoming a serious problem.
In 2014 thieves cut her frames to steal her axle boxes and rendered her irreparable. She was scrapped as result.
She is in my opinion the greatest loss to the preserved steam locomotives of the South African Railways.
On a sweltering Monday afternoon just north of Potchefstroom, the last remnants of rain reflect Rovos Rail passing by, seen here just before the junction to the double mainline.
The train had just returned from across the border up north, detouring via Mafikeng and Krugersdorp.
Potchefstroom
27th January 2025
During 1988 class 25NC no 3407 became the last steam loco the SAR ever put through heavy overhaul at Bloemfontein shops. She was out-shopped on 29 July but never returned to commercial use and was sent to Millsite shed, Krugersdorp, for special workings.
She is seen here on 27 October 1990 leaving Groot Marico on the line from Krugersdorp to Mafikeng with a tour train. Millsite painted her green and personally I thought she looked stunning.
Transvaal, South Africa
This was the sun rise just outside Mahikeng – formerly, and still commonly, known as Mafikeng and is the capital city of the North-West Province of South Africa. Taken while traveling at 120km
This was the sun rise just outside Mahikeng – formerly, and still commonly, known as Mafikeng and is the capital city of the North-West Province of South Africa Taken while traveling at 120km
25NC's 3407 & 3476 pass through Tarlton traveling from Johannesburg to Mafikeng with if my memory serve's me right, "The Union Ltd" which was run in conjunction with the Kimberley Steam Festival and Brush with Steam in July/August 1991.
Mamiya 645. Fuji 100.
By the time I got to South Africa the big Garrets were gone from the mountain passes and working their last miles on the flats between Vryburg and Mafikeng. October 1983.
Blue Train
Back to boarding school South African style, the International school is in Mafikeng, a hundred mile train journey from Johannesburg, Tallia is early, her friends have not yet arrived at the station, but that’s ok, Father O’hulohan will supervise, stickers of the train wall for Youth League and Nelson Mandela indicate a date of about 1960
( thanks to Jef Wharton and to Tallia )
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
BD214 has just arrived with the Rovos Rail train and will now reverse on the Y before heading back across the border to Botswana. 34 100 and 34 436 will take over the Rovos train, whilst the rest of the started up engines are for freight work.
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy lady bailey in grabouw/elgin
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
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South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
is a landlocked country in Southern Africa. Citizens of Botswana are called "Batswana" (singular: Motswana), regardless of ethnicity. Formerly the British protectorate of Bechuanaland, Botswana adopted its new name after becoming independent within the Commonwealth on 30 September 1966. It has held free and fair democratic elections since independence.
Geographically the country is flat and up to 70% of Botswana is covered by the Kalahari Desert. It is bordered by South Africa to the south and southeast, Namibia to the west and north, and Zimbabwe to the northeast. It meets Zambia at a single point.
Botswana is a regional leader in economic freedom. Competitiveness and flexibility are promoted by a sensible business regulatory environment, openness to foreign investment and trade, and relatively flexible employment regulations. The financial sector remains relatively well developed, with an independent central bank and little government intervention. The independent judiciary provides strong protection of property rights. Botswana was one of the most impoverished countries in Africa when it became independent in 1966. Today, it is home to a relatively stable political system and a rapidly developing market economy. Being closely tied with the economy of South Africa, the country's economy is one of the most successful in Africa and is dominated by the fast-growing service sector, world-renowned diamond industry, tourism, and manufacturing. Botswana's economic growth rate has outpaced the economic growth of even the Asian Tigers, and the World Bank cites Botswana as one of the world's great development success stories.
Total government expenditures, including consumption and transfer payments, are moderate. In the most recent year, government spending equaled 33.1 percent of GDP. Parliament began a review of the draft National Development Plan in 2009. Botswana’s tax rates remain among the lowest in Southern Africa. Both the top income tax rate and the top corporate tax rate are 25 percent. Other taxes include a value-added tax (VAT), a property tax, and an inheritance tax. In the most recent year, overall tax revenue as a percentage of GDP was 36.6 percent.
History
In the 19th century, hostilities broke out between Tswana inhabitants of Botswana and Ndebele tribes who were making incursions into the territory from the north-east. Tensions also escalated with the Boer settlers from the Transvaal to the east. After appeals by the Batswana leaders Khama III, Bathoen and Sebele for assistance, the British Government put "Bechuanaland" under its protection on 31 March 1885. The northern territory remained under direct administration as the Bechuanaland Protectorate and is modern-day Botswana, while the southern territory became part of the Cape Colony and is now part of the northwest province of South Africa. The majority of Setswana-speaking people today live in South Africa.
When the Union of South Africa was formed in 1910 out of the main British colonies in the region, the Bechuanaland Protectorate, Basutoland (now Lesotho) and Swaziland (the "High Commission Territories") were not included, but provision was made for their later incorporation. However, a vague undertaking was given to consult their inhabitants, and although successive South African governments sought to have the territories transferred, Britain kept delaying; consequently, it never occurred. The election of the Nationalist government in 1948, which instituted apartheid, and South Africa's withdrawal from the Commonwealth in 1961, ended any prospect of incorporation of the territories into South Africa.
An expansion of British central authority and the evolution of tribal government resulted in the 1920 establishment of two advisory councils to represent both Africans and Europeans. Proclamations in 1934 regularized tribal rule and powers. A European-African advisory council was formed in 1951, and the 1961 constitution established a consultative legislative council.
In June 1964, Britain accepted proposals for a democratic self-government in Botswana. The seat of government was moved in 1965 from Mafikeng in South Africa, to the newly established Gaborone, which sits near its border. The 1965 constitution led to the first general elections and to independence on 30 September 1966. Seretse Khama, a leader in the independence movement and the legitimate claimant to the Ngwato chiefship, was elected as the first president, re-elected twice.
The presidency passed to the sitting vice president, Quett Masire, who was elected in his own right in 1984 and re-elected in 1989 and 1994. Masire retired from office in 1998. The presidency passed to the sitting vice president, Festus Mogae, who was elected in his own right in 1999 and re-elected in 2004. The presidency passed in 2008 to Ian Khama (son of the first president), who resigned his position as leader of the Botswana Defence Force to take up this civilian role.
Geography
Botswana is a landlocked country located in Southern Africa, north of South Africa. Botswana occupies an area of 600,370 square kilometres, of which 585,000km² are land. Botswana has land boundaries of combined length 4,013 kilometres, of which the constituent boundaries are shared with Namibia, for 1,360 km; South Africa 1,840 km; Zimbabwe, 813 km and Zambia, less than 1 km. Much of the population of Botswana is concentrated in the eastern part of the country.
Other info
Oficial Name:
Lefatshe lo Botswana
Republic of Botswana
Independence: 30 September 1966
Area:
600.370km2
Capital:
Gaborone
Inhabitants:
1.873.267
Languages:
Afrikaans [afr] 6,000 in Botswana (2004 Cook). Spoken as first language mainly in commercial farms and Ghanzi village, Ghanzi District, in the southern half of Kgalagadi District, especially near the South Africa border, and in Takatokwane village, Kweneng District. Classification: Indo-European, Germanic, West, Low Saxon-Low Franconian, Low Franconian
||Ani [hnh] 1,000 (1997 Brenzinger). Northwest District, Khwai River, Mababe. Near the Khwe. Alternate names: Handá, |Anda, Handádam, Handakwe-Dam, Handa-Khwe, Ts'éxa, Ts'exa. Dialects: Related to Khwe. Classification: Khoisan, Southern Africa, Central, Tshu-Khwe, Northwest
Birwa [brl] 15,000 in Botswana (2004 Cook). Central District, Bobonong Subdistrict. East of Selebi-Phikwe in the villages: Bobonong, Kobojango, Semolale, Motalatau, and Mathathane. Also spoken in South Africa. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, S, Sotho-Tswana (S.30), Sotho
More information.
English [eng] Alternate names: Sekgoa. Classification: Indo-European, Germanic, West, English
||Gana [gnk] 2,000 (2004 Cook). Ghanzi District, New Xadi and Ghanzi villages, Ghanzi commercial farms, Central Kalahari Game Reserve. Central District, Boteti Subdistrict, cattleposts south and west of Rakops village. East of Naro, north of |Gwi. Alternate names: G||ana, G||ana-Khwe, Gxana, Gxanna, Dxana, Kanakhoe. Dialects: Domkhoe, G||aakhwe (G||aa), G||anakhwe (Kanakhoe), |Khessákhoe. Classification: Khoisan, Southern Africa, Central, Tshu-Khwe, Northwest
Gciriku [diu] 2,000 in Botswana (2004 Cook). Alternate names: Diriku, Diriko, Rugciriku, Mbogedo, Mbogedu, Shimbogedu. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, K, Diriku (K.70)
|Gwi [gwj] 2,500 (2004 Cook). Kweneng District: Dutlwe, Serinane, Takotokwane, Kautwane, Khekhenye, Letihakeng, Morwamosu, and Tsetseng villages. Ghanzi District: New Xade, East Hanahai, and Kacgae villages. Alternate names: G||wikhwe, G||wi, G|wi, Gcwi, G!wikwe, G|wikhwe, Dcui. Dialects: Khute. Classification: Khoisan, Southern Africa, Central, Tshu-Khwe, Southwest
Herero [her] 20,000 in Botswana (2004 Cook). Scattered among many ethnic groups, usually having their own areas within larger towns and villages: Northwest District (Maun, Gomare, Sehitwa, Makakung, Nokaneng, Shakawe, Nxaunxau, and western cattleposts), Central District (Mahalapye, Toromoja, Rakops, Mokoboxane, Letlhakane), Ghanzi District (Charles Hill, Ghanzi, Makunda, Dryhoek, New Kanagas, Dekar), Kgalagadi District (Tsabong, Omaweneno, Werda), Kgatleng District (Morwa). Alternate names: Otjiherero, Ochiherero. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, R, Herero (R.30)
=|Hua [huc] 200 (2004 Cook). Southern Kalahari Desert, Kweneng District. Sasi are in southwestern Mahalapye Subdistrict of the Central District. Alternate names: =|Hua-Owani, |Hua, |Hû, =|Hoan, =|Hoa. Dialects: =|Hua, Sasi. Related to !Xóõ. Classification: Khoisan, Southern Africa, Southern, Hua
Ju|'hoan [ktz] 5,000 in Botswana (2002). Northwest District, on Namibia and Angola borders, north of =|Kx'au||'ein. Also spoken in Namibia. Alternate names: Kung-Tsumkwe, Xû, Xun, Kung, !Xo, Ju'oasi, Zhu'oasi, Dzu'oasi, Tsumkwe, Dobe Kung, Xaixai. Dialects: Dzu'oasi (Ssu Ghassi, Zhu'oase), Nogau (Agau). May be intelligible with =|Kx'au||'ein. Classification: Khoisan, Southern Africa, Northern
Kalanga [kck] 150,000 in Botswana (2004 Cook). The entire Northeast District and the eastern third of Central District. Lilima dialect is mainly in Botswana, Kalanga mainly in Zimbabwe. Alternate names: Ikalanga, Chikalanga, Tjikalanga, Kalaka, Sekalaña, Sekalaka. Dialects: Nyai (Nyayi), Ikalanga, Talahundra, Lilima (Humbe), Peri. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, S, Shona (S.10)
Kgalagadi [xkv] 40,000 in Botswana (2004 Cook). South and central, along the South Africa border, northern half of Kgalagadi District, western half of Kweneng, and western half of Southern districts. Ghanzi District: Ghanzi, Kanagas, Tsotsha, Kuke, Karakobis, Ncojane, Kule, Charles Hill, New Xade, Dekar, and Grootlaagte villages. Northwest District: Sehitwa and Maun. Also spoken in Namibia. Alternate names: Khalagari, Khalakadi, Kxhalaxadi, Qhalaxarzi, Shekgalagadi. Dialects: Ngologa, Shaga, Kgalagadi, Balaongwe, Pedi, Phaleng, Kenyi, Khakhae, Koma, Rhiti, Siwane. Ngologa is the largest dialect. It may be 2 separate languages. A separate language from Tswana. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, S, Sotho-Tswana (S.30), Kgalagadi
Khwe [xuu] 4,000 in Botswana (2004 Cook). Northwest District: Gan, Cadikarauwe, Mohembo, Shakawe, Kaputura, |Ao-Kyao, Sikondomboro, Ngarange, Sekanduko, Xongoa, Cauwe, Moxatce, Dungu, Seronga, Beyetca, Gudigoa, Sicokora, Geixa, |Qom-ca, Tobere, =|Umbexa, Djaxo, Kangwara villages. Alternate names: Khoe, Kxoe, Xun, "Water Bushmen", "Mbarakwena". Dialects: Buga-Kxoe (Boga, Buga-Khwe, Bukakhwe, "River Bushman", ||Anikxoe, ||Ani-Khoe, Tannekwe, Gani-Khwe). Classification: Khoisan, Southern Africa, Central, Tshu-Khwe, Northwest
Kua [tyu] 817 (2004 Cook). Central District, especially Mahalapye, Serowe subdistricts and Northeast District. Primarily on cattleposts and in 'settlements'. Alternate names: Cua, Tyua, Tyhua. Classification: Khoisan, Southern Africa, Central, Tshu-Khwe, Northeast
Kuhane [sbs] 12,000 in Botswana (1993 Johnstone). Northwest District, Chobe Subdistrict. Alternate names: Echisubia, Subia, Supia, Kwahane, Kuahane, Sesubea, Subiya, Chikuhane. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, K, Subia (K.50)
=|Kx'au||'ein [aue] 2,000 in Botswana (2004 Cook). Ghanzi District: Grootelaagte, Kanagas, Ghanzi villages, and on the commercial farms. Alternate names: Kung-Gobabis, ||Au||ei, ||X'au||'e, =|Kx'au||'ei, Auen, Kaukau, Koko. Dialects: Nogau. Classification: Khoisan, Southern Africa, Northern
Mbukushu [mhw] 20,000 in Botswana (2004 Cook). Northwest District, in all villages north of Gomare which are within 30 km of the Okavango River. Alternate names: Mbukushi, Mambukush, Mampukush, Mbukuhu, Thimbukushu, Gova, Kusso. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, K, Kwangwa (K.40)
Nama [naq] 1,500 in Botswana (2002). Kgalagadi District, Tsabong, Makopong, Omaweneno, Tshane villages; Ghanzi District, villages along the Ghanzi-Mamuno road. Alternate names: Naman, Namakwa, Namaqua, Dama, Damara, Damaqua, Tama, Tamma, Tamakwa, Berdama, Bergdamara, Kakuya Bushman Nasie, Rooi Nasie, "Hottentot", "Kupkaffer", "Kupkaferrn", Koekhoegowap. Classification: Khoisan, Southern Africa, Central, Nama
Nambya [nmq] 15,000 in Botswana (2004 Cook). Alternate names: Chinambya, Nanzva, Nambzya. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, S, Shona (S.10)
Naro [nhr] 10,000 in Botswana (2004 Cook). Population total all countries: 14,000. Ghanzi District: Ghanzi, Bere, Dekar, East Hanahai, West Hanahai, Kuke, New Kanagas, Tshobokwane, Makunda, Grootelaagte, Karakobis, Kanagas, Charles Hill villages, and on commercial farms. Also spoken in Namibia. Alternate names: Nharo, Nharon, Nhauru, Nhaurun, ||Aikwe, |Aikwe, ||Ai||en, ||Aisan, ||Ai||e. Dialects: |Amkwe, |Anekwe, G!inkwe, !Gingkwe, G!okwe, Qabekhoe (Qabekho, !Kabbakwe), Ts'aokhoe (Tsaukwe, Tsaokhwe), Tserekwe, Tsorokwe, N|hai-Ntse'e (N||hai, Ts'ao). Classification: Khoisan, Southern Africa, Central, Tshu-Khwe, Southwest
Ndebele [nde] 8,000 in Botswana (2002). Northeast District, a few villages. Alternate names: Tabele, Tebele, Isinde'bele, Sindebele, Northern Ndebele. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, S, Nguni (S.40)
Shua [shg] 6,000 (2004 Cook). Population includes 100 Danisi (1977 Voegelin and Voegelin). Central District, Tutume Subdistrict: Nata, Gweta; Boteti Subdistrict: Motopi, Popipi, Mokoboxane, Mmatshumu, Letlhakane. Alternate names: Shua-Khwe, Mashuakwe, Tshumakwe. Dialects: Shua-Khwe (Mashuakwe), N|oo-Khwe (N|oo, N||ookhwe), |Oree-Khwe (|Oree, |Koree-Khoe), ||'Aiye (|Aaye), |Xaise (|Haise, |Taise, |Hais, |Ais), Tshidi-Khwe (Tsh'iti, Tcaiti, Sili, Shete Tsere), Danisi (Danisis, Danisa, Demisa, Madenasse, Madenassa, Madinnisane), Cara, Deti, Ganádi. Classification: Khoisan, Southern Africa, Central, Tshu-Khwe, North Central
Tsoa [hio] 5,000 in Botswana (2004 Cook). Population total all countries: 8,536. Central District, especially Mahalapye, Serowe subdistricts; Northeast District. Primarily on cattleposts and in 'settlements'. Also spoken in Zimbabwe. Alternate names: Chware, Tshwa, Sarwa, Sesarwa, Haitshuari, Hietshware, Hiotshuwau, Hiochuwau, Tshuwau, Chuwau, Gabake-Ntshori, G||abake, Masarwa, Tati, Tati Bushman, Kwe-Etshori Kwee, Kwe, Kwe-Tshori. Classification: Khoisan, Southern Africa, Central, Tshu-Khwe, Northeast
Tswana [tsn] 1,070,000 in Botswana (1993 Johnstone). Population total all countries: 4,407,174. Spoken throughout the country as lingua franca, and as first language primarily in the Southeast and Kgatleng districts, the eastern half of Southern and Kweneng districts, in the Serowe-Palapye and Mahalapye subdistricts of Central District, and around Maun village in Northwest District. Also spoken in Namibia, South Africa, Zimbabwe. Alternate names: Chuana, Coana, Cuana, Setswana, Sechuana, Beetjuans. Dialects: Tlahaping (Tlapi), Rolong, Kwena, Kgatla, Ngwatu (Ngwato), Tawana, Lete, Ngwaketse, Tlokwa. Southern Sotho, Northern Sotho, and Tswana are largely inherently intelligible but have generally been considered separate languages. Standard Tswana uses Kgatla dialect. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, S, Sotho-Tswana (S.30), Tswana
Tswapong [two] 2,000 (1997 Andersson and Janson). Central District, Mahalapye Subdistrict: all villages east of Mahalapye. Alternate names: Setswapong. Dialects: Some similarities to Pedi (N. Sotho) and some to Tswana, but it is not clearly a dialect of either. Some intelligibility to speakers of a northern dialect of Tswana (Sengwato and Setawana), and to speakers of a northwestern dialect of Pedi (Hananwa and Setokwa). Some speakers of Birwa and Tswapong have said that their varieties are closer to one another than to Tswana or Pedi. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, S, Sotho-Tswana (S.30)
!Xóõ [nmn] 4,000 in Botswana (2002). Population total all countries: 4,200. Southern Gantsi District, northern Kgalagadi District, western Southern and western Kweneng districts. Also spoken in Namibia. Alternate names: Ng|amani, Tsasi. Dialects: Auni (|Auni, |Auo), Kakia (Masarwa), Ki|hazi, Ng|u||en (Nu||en, |U||en, Ng|u|ei, |Nu||en, ||U||en), Nusan (Ng|usan, Nu-San, Noosan), Xatia (Katia, Kattea, Khatia, Vaalpens, |Kusi, |Eikusi), !Kwi. Classification: Khoisan, Southern Africa, Southern, Hua
Yeyi [yey] 20,000 in Botswana (2004 Cook). Population total all countries: 25,200. Ethnic population: 47,000 in Botswana. North West District, Maun, Shorobe up to Mababe, Sankoyo, Daunara, Nokaneng, Gumare, Sepopo, Ikoga, Shakawe, and Seronga. Central District, Letihakane, Xumu, Rakops, Motopi. Capitals for Wayei Maun and Gumare. Also spoken in Namibia. Alternate names: Shiyeyi, Yeei, Yei, Ciyei, Koba, Kuba. Dialects: Shirwanga. Not closely related to other languages. Lexical similarity 47% with Luyana, 30% with Herero. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, R, Yeye (R.40)
Zezuru [sna] 11,000 in Botswana (2004 Cook). Alternate names: Shona. Dialects: Karanga. Classification: Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, Bantoid, Southern, Narrow Bantu, Central, S, Shona
Meaning of the country name:
Named after the country's largest ethnic group, the Tswana.
Bechuanaland (former name): derived from Bechuana, an alternative spelling of "Botswana".
Description Flag:
The national flag of Botswana was adopted on September 30, 1966. The flag is light blue with a black horizontal band across the centre, with white fimbriation. The stripes are in a ratio of 9:1:4:1:9. The blue colour stands for water, specifically rain, and comes from the motto on the Botswana coat of arms, which states Pula, the Tswana word for "Let there be rain". The white and black bands stand for racial harmony, and also refer to the zebras that support the nation's coat of arms.
Coat of arms:
The Coat of Arms of Botswana was adopted on January 25, 1966. The centre shield is supported by two zebras. The shape of the shield is that of traditional shields found in East Africa. On the top portion of the shield are three cogwheels that represent industry.
The three waves symbolize water, and reminds the viewer of the motto of the nation: pula that means simply "rain". This motto also highlights the importance of water to Botswana. The motto is found at the bottom of the coat of arms on a blue banner.
At the bottom of the shield is the head of a bull, which symbolizes the importance of cattle herding to Botswana. The two zebras are present since zebras are an important part of Botswana's wildlife. The zebra on the right holds an ear of sorghum, an important crop in the nation. The zebra on the left holds a tusk of ivory, symbolic of the former ivory trade in Botswana.
Motto:" Fatshe leno la rona " "Blessed Be This Noble Land "
National Anthem: Fatshe leno la rona
Tswana Lyrics
Fatshe leno la rona,
Ke mpho ya Modimo,
Ke boswa jwa borraetsho;
A le nne ka kagiso.
CHORUS:
Tsogang, tsogang! banna, tsogang!
Emang, basadi, emang, tlhagafalang!
Re kopaneleng go direla
Lefatshe la rona.
Ina lentle la tumo
La chaba ya Botswana,
Ka kutlwano le kagisano,
E bopagantswe mmogo.
CHORUS
English Lyrics
Blessed be this noble land,
Gift to us from God's strong hand,
Heritage our fathers left to us.
May it always be at peace.
CHORUS: Awake, awake, O men, awake!
And women close beside them stand,
Together we'll work and serve
This land, this happy land!
Word of beauty and of fame,
The name Botswana to us came.
Through our unity and harmony,
We'll remain at peace as one.
CHORUS
Internet Page: www.botswana-tourism.gov.bw
Bostuana in diferent languages
eng | afr | bre | cat | ces | cor | cym | dan | est | eus | fin | fra | fry | hat | hun | ibo | ina | ita | jav | jnf | kin | lim | lin | mlt | nld | nor | nso | oci | pol | roh | ron | run | rup | slk | sme | swa | swe | szl | tsn | vor | wol | zza: Botswana
ast | dsb | gla | glg | hsb | lat | lld | scn | spa | sqi | tet: Botsuana
aze | crh | kaa | slo | uzb: Botsvana / Ботсвана
fao | isl | lit | smg | tur: Botsvana
deu | ltz | nds: Botsuana / Botſuana; Botswana / Botſwana
arg | por: Botsuana; Botswana
hrv | slv: Bocvana
ind | msa: Botswana / بوتسوانا
mol | tuk: Botswana / Ботсвана
bam: Bɔtisiwana
bos: Bocvana / Боцвана
epo: Bocvano
frp: Botsouana
fur: Bozvane
gle: An Bhotsuáin / An Ḃotsuáin
glv: Yn Votswaan
kmr: Botswana / Ботсwана / بۆتسوانا; Botsvana / Ботсвана / بۆتسڤانا
kur: Botswana / بۆتسوانا
lav: Botsvāna
mlg: Botsoana
nrm: Bossouana
que: Butswana
rmy: Botswana / बोत्स्वाना
smo: Potesuana
som: Botuswaana
srd: Botzuana
vie: Bốt-xoa-na
vol: Zvanän
wln: Boswana
zul: iButswana
abq | alt | che | chm | kir | kjh | kom | krc | kum | rus | tyv | udm | ukr: Ботсвана (Botsvana)
bak | tat: Ботсвана / Botsvana
bel: Батсвана / Batsvana; Бацвана / Bacvana
bul: Ботсуана (Botsuana)
chv: Ботсванӑ (Botsvană)
kaz: Ботсвана / Botsvana / بوتسۆانا
kbd: Ботсванэ (Botsvană)
mkd: Боцвана (Bocvana)
mon: Ботсван (Botsvan)
oss: Ботсванӕ (Botsvanä)
srp: Боцвана / Bocvana
tgk: Ботсвана / باتسونه / Botsvana
ara: بوتسوانا (Būtsuwānā); بتسوانا (Butsuwānā)
fas: بوتسوانا (Botsvānā)
prs: بوتسوانا (Bōtsvānā)
pus: بوټسوانا (Boṫswānā); بوتسوانا (Botswānā)
uig: بوتسۋانا / Botswana / Ботсвана
urd: بوٹسوانا (Bôṫsvānā)
div: ބޮޓްސްވާނާ (Boṫsvānā); ބޮޓުސްވާނާ (Boṫusvānā)
heb: בוצואנה (Bôtsûʾanah); בוטסואנה (Bôṭsûʾanah)
lad: בוטסב'אנה / Botsvana
yid: באָצװאַנאַ (Botsvana)
amh: ቦትስዋና (Botswana)
ell: Μποτσουάνα (Mpotsoyána)
hye: Բոտսվանա (Botsvana); Բոթսվանա (Boṭsvana)
kat: ბოტსვანა (Botsvana)
hin: बोत्स्वाना / बोत्सवाना (Botsvānā)
mar: बोट्स्वाना (Boṭsvānā)
ben: বতসোয়ানা (Bôtsoyānā); বোত্সুয়ানা (Botsuyānā); বোৎসোয়ানা (Botsoyānā)
guj: બોટ્સ્વાના (Boṭsvānā)
pan: ਬੋਟਸਵਾਨਾ (Boṭsvānā)
kan: ಬೋಟ್ಸ್ವಾನ (Bōṭsvāna)
mal: ബോട്സ്വാന (Bōṭsvāna)
tam: போட்ஸ்வானா (Pōṭsvāṉā); பொட்ஸ்வானா (Poṭsvāṉā)
tel: బోత్సువానా (Bōtsuvānā)
zho: 博茨瓦納/博茨瓦纳 (Bócíwǎnà)
jpn: ボツワナ (Botsuwana)
kor: 보츠와나 (Bocheuwana)
mya: ဘော့ဆ္ဝာနာ (Bʰɔ́sʰwana)
tha: บอตสวานา (Bɔ̄tswānā)
khm: បុតស្វាណា (Butsvāṇā); បូសស្វានណា (Būssvānṇā)
Director-General in the Presidency Cassius Lubisi addresses graduates on the occasion of the graduation ceremony of the Faculty of Human and Social Sciences at the North West University, Mafikeng Campus. (Photo: GCIS)
Director-General in the Presidency Cassius Lubisi addresses graduates on the occasion of the graduation ceremony of the Faculty of Human and Social Sciences at the North West University, Mafikeng Campus. (Photo: GCIS)
Director-General in the Presidency Cassius Lubisi addresses graduates on the occasion of the graduation ceremony of the Faculty of Human and Social Sciences at the North West University, Mafikeng Campus. (Photo: GCIS)
Director-General in the Presidency Cassius Lubisi addresses graduates on the occasion of the graduation ceremony of the Faculty of Human and Social Sciences at the North West University, Mafikeng Campus. (Photo: GCIS)
Director-General in the Presidency Cassius Lubisi addresses graduates on the occasion of the graduation ceremony of the Faculty of Human and Social Sciences at the North West University, Mafikeng Campus. (Photo: GCIS)
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
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South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
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South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
Jordan Gestring, an IMB MK (missionary kid), gives a high five to a Setswana boy during a Christian soccer clinic outside Mafikeng, South Africa. Gestring is a sophomore at Clemson University in South Carolina. – photo by Martha Richards
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
From Wikipedia, the free encyclopedia
Jump to: navigation, search
South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]
steamy ladies jessica and bailey in grabouw/elgin today
bailey is still a classic coal burner but jessica has been converted to oil burning
South African Class 19D 4-8-2
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South African Class 19D 4-8-2
Delivered1937–1953
First run1937
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.[1][2][3][4]
Contents [hide]
* 1Manufacturers2Characteristics2.1Watson Standard boilers2.2Tenders3Service3.1South African Railways3.2Other operators3.2.1Benguela Railway3.2.2Rhodesia Railways3.2.3Nkana Mines3.2.4Wankie Colliery3.3Industrial4Red Devil predecessor5Works numbers and renumbering6Illustration7References8
External links
Manufacturers[edit]
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.[3][5][6]
W.A.J. Day
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.[2][3]
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.[2]
* The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.[2][7]
* In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.[2][7][8]
* Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.[1]
* The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.[9][10][11]
* In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.[3][9]
* Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.[3][12]
* In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.[3][9]
Characteristics[edit]
The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear. The cylinders were redesigned with straighter steam ports while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.[2][3][4]
The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They were of cast iron and had liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.[2]
All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.[2]
Watson Standard boilers[edit]
The Class 19D was delivered with a Watson Standard no. 1A boiler, fitted with Ross Pop safety valves and set at 200 pounds per square inch (1,379 kilopascals) pressure. The regulator was of the multiple-valve type, with the valves arranged on the saturated steam side of the superheater header in accordance with SAR practice. The boiler was one of the range of standard type boilers which were designed by Day's predecessor as CME, A.G. Watson, as part of his standardisation policy. The locomotive was also equipped with a Watson cab with its distinctive inclined front.[1][2][4][10][11]
Despite the specifications, the first batch of Class 19D locomotives, built by Krupp and Borsig and delivered in 1937 and 1938, came in two variations. The Krupp-built locomotives were delivered with domeless boilers, while the Borsig-built locomotives conformed to the specifications with domed boilers.[1][2][4]
While the domeless boilers did not conform to the specified Watson Standard no. 1A boiler as far as the dome was concerned, they were accepted nevertheless, probably since all their other dimensions were identical to that of the Watson Standard boiler. It appears that Krupp had decided on their own accord that a dome was not necessary since there was no regulator in the dome, but merely a standpipe. Krupp substituted the dome with a manhole cover on which the two Pop safety valves were mounted, while the steam was collected through a battery of collecting pipes, situated high up in the boiler in a similar manner to that which was used in the Class 16E.[1][2]
All the subsequent Class 19D orders were delivered with domed Watson Standard no. 1A boilers with the usual standpipe steam collector high up in the dome, from where steam was led to the multi-valve regulator in the smokebox. Technically, whenever the loading gauge permitted the use of domes, their use was preferable to the domeless system which resulted in crowding multiple pipes into the boiler and other complications better left out of boilers. Operationally, according to drivers, there was no apparent difference in locomotive performance between the two boiler types.[1][2][13]
The Watson Standard boilers are interchangeable between locomotives. In the process of locomotives undergoing major overhauls, these twenty Krupp-built domeless boilers migrated between engines during subsequent years. As a result, locomotives from the other builders and even some Classes 19A and 19C locomotives eventually ended up with some of these domeless boilers.[4]
Tenders[edit]
As a result of having been built over such a long time span by so many different manufacturers, the six main groups of the Class 19D all had different all-up weights and axle loadings, as shown in the table and the specifications in the infobox. Over the eleven years during which the Class 19D was being produced for the SAR, some alterations occurred.[1][10][11]
* As built, the Class 19D was delivered with Type MT tenders with a 12 long tons (12.2 tonnes) coal and a 6,000 imperial gallons (27,300 litres) water capacity, even though the axle load of 16 long tons 11 hundredweight (16,820 kilograms) of these tenders exceeded the permissible limits on the branch lines for which the Class 19D was intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified Type MP1 tenders from some of the reboilered mainline locomotives. The Type MP1, many of which were later rebuilt to Type MR tenders, had a lighter axle load of 13 long tons 15 hundredweight (13,970 kilograms) and was therefore more suitable for branch line work. This policy was followed with all the Classes 19B, 19C and 19D, except the last batch of Class 19D for the SAR, numbers 3321 to 3370.[1][2]
* During 1944 Dr. M.M. Loubser, then CME, who had been involved with the design of the Class 19 family from the very beginning in the late 1920s, made further improvements to the Class 19D. All the post-war locomotives came equipped with vacuum brake systems in addition to the steam brakes. The two 21 inches (533 millimetres) vacuum cylinders were fitted under the running boards on either side at a point about midway between the leading and driving coupled wheels, while the vacuum chamber was arranged in line with the intermediate coupled wheels.[1][2]
Buckeye bogie
* The final batch from NBL, numbers 3321 to 3370, had Type MX tank wagon type tenders with cylindrical water tanks, similar in appearance to the American Vanderbilt type tenders. They were built to the design of Dr. M.M. Loubser, ran on three-axle Buckeye bogies and became commonly known as Torpedo tenders.[1][4]
Service[edit]
South African Railways[edit]
During the service life of the Class 19D, several tender exchanges occurred to best equip a locomotive for the region it was allocated to and the type of service it was to be employed in. In line service, type MX Torpedo tenders were usually preferred for their larger coal and water capacities. The result was that by the time the Class 19D was withdrawn from service in the late 1980s, many had exchanged their Type MP1 or Type MR tenders for Type MX Torpedo tenders and vice versa. Type MX Torpedo tenders also ended up attached to Class 19B and Class 19C locomotives.[1][14]
The Class 19D was the most numerous South African branch line locomotive and, at 235 built for the SAR, was only twenty less in number than the Class 15F mainline locomotive, the most numerous South African steam class. The Class 19D was very versatile and saw main- and branch line service all over South Africa with the exception of the Western Cape, where the Class 19C was used.[3]
Tasks varied from mainline local and international passenger trains on the section between Warrenton and Mafeking en route between South Africa and Northern Rhodesia via Bechuanaland and Southern Rhodesia, to secondary and branch line duties and in later years as shunting engines. On occasion, South African Class 19D locomotives worked through from Mafikeng in South Africa via Botswana all the way to Bulawayo in Zimbabwe. SAR Class 19D locomotives were also hired out for shunting work to the Rhodesia Railways for use at Beit Bridge and to Mozambique for use at Lourenco Marques.[3]
From c. 1972, the new Union Carriage & Wagon-built Blue Train was stabled at Pretoria. After Capital Park’s blue-liveried Class S2 no. 3793 was withdrawn along with the rest of its class in 1979-1980, the Pretoria station carriage-shunt duties were taken over by a blue-painted Class 19D no. 2749, the only member of the class to serve in a different SAR livery from the usual black. Apart from shunting work, the blue Dolly was often specially requested to work the Cullinan train during the Jacaranda season.[15]
The Class 19D served until right at the end of the South African steam era and were amongst the last steam locomotives to be replaced by electric and diesel-electric traction.[3]
Other operators[edit]
Other Southern African railways and some industries also purchased locomotives built to the Class 19D design. When these foreign versions are included, a total of 268 locomotives were built to the Class 19D design making them even more numerous than the Class 15F.[3]
Benguela Railway[edit]
Six were built for the Caminho de Ferro de Benguela (CFB or Benguela railway) in Angola by NBL in 1951, as their 11th Class and numbered in the range from 401 to 406.[9] These locomotives were wood- or coal-fired, depending on where they were operating, and had tenders with slatted frames installed on top of the bunker to increase their fuel capacity when wood was used. In August 1972, for example, numbers 401, 402 and 406 were based at Lobito and were observed to be coal-fired. At the same time, numbers 403 and 405 were observed at Luso and no. 404 at Nova Lisboa, all wood-fired.
Rhodesia Railways[edit]
Between 1951 and 1953, Henschel and Son built twenty for Rhodesia Railways, their 19th class, numbered in the range from 316 to 335. They had tenders similar to the SAR Torpedo type, but with plate frame bogies instead of cast frame Buckeye bogies.[3][12][16]
A single RR 19C class, no. 336, was built by Henschel in 1953 as a condensing locomotive. After a collision in 1956, it was rebuilt into a non-condensing 19th Class and re-entered service in 1958. The condensing tender was rebuilt to a Torpedo tender by mounting a tank and coal bunker, supplied locally in Bulawayo, on the frame.[16][17] This rebuilt tender is the one paired with no. 330 which is preserved in the Bulawayo Railway Museum.[18]
By June 1975, only three were left in service, all allocated to the Bulawayo shed, but with two out-stationed at Mafeking in South Africa.[19]
Nkana Mines[edit]
Two were built by Henschel for the Nkana copper mines in Northern Rhodesia in 1952, numbered 107 and 108.[17] In 1967, they were sold to a Rhodesian scrap merchant who, in turn, sold them to Rhodesia Railways where they were overhauled and placed back in service in 1968 as RR 19B Class no. 337 and 338.[12][16]
Wankie Colliery[edit]
In 1955 four more without superheating and numbered in the range from 1 to 4 were built to the design of the Class 19D by NBL for the Wankie Colliery in Southern Rhodesia.[16]
Industrial[edit]
As they were being retired, several Class 19D locomotives were sold into industrial service. By the late 1980s, some of them were already at work at Dunn's, Saiccor, Loraine Gold Mine and Bamangwato Concessions Ltd. (BCL) in Botswana, and more were to follow.[3]
As late as 2011, two Class 19Ds which had been used on the Vaal Reefs Gold Mine in the 1980s until they were retired and dumped at Jan Kempdorp where they stood unprotected for about twenty years, were bought by BCL Selebi-Phikwe. The locomotives, possibly numbers 2678 and 2689, were to be overhauled for use by the mine there, which was still operating ex-SAR Class 19D and ex-RR 19th class locomotives. By June 2012, the first of these two was put into service and it was expected that the second was to follow during the course of the year.[20][21]
Red Devil predecessor[edit]
As a trial run before SAR mechanical engineer David Wardale was granted permission to proceed to rebuild a Class 25NC 4-8-4 locomotive to the Class 26 Red Devil in 1979, he was allowed to carry out modifications to a Class 19D locomotive. The locomotive selected for the experiment was Krupp-built no. 2644, a particularly poor-steaming member of the Class at the time.[3]
No. 2644 at SANRASM's South Site, 3 February 2011, before being vandalised to the extent that it was scrapped in 2014
A gas producer combustion system (GPCS) and dual Lempor exhaust were installed, along with some other small improvements. The Lempor had a four-jet blastpipe with extended petticoats to provide truer ejector proportions. To accommodate the arrangement, the smokebox was extended by 300 millimetres (11.8 inches). Steam flow in the cylinders was improved by streamlining the edges of the piston valves which were each equipped with an additional valve ring to reduce leakage. The firebox was modified to the GPCS system wherein principal combustion is effected using secondary air introduced above the firebed through ducts in the firebox sides, while primary air was restricted through dampers and a redesigned grate.[3]
Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate. Sanding was improved and de-sanding jets were installed to clean the rails after the locomotive had passed.[3]
The modifications improved the locomotive's steaming rate and enabled it to achieve significantly higher power and significantly lower fuel consumption than other unmodified Class 19D locomotives, the coal savings and increased output being in the order of 20% to 25%. The success of this experiment convinced the SAR management at the time of the viability of the project which culminated in the Class 26 Red Devil.[3][4][22]