View allAll Photos Tagged cycloidal
Fidalgo Bay
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
CAEDMON - IMO : 7314888
Built 1973, by Robb Caledon Shipbuilder Ltd, Dundee , UK (Yard # 560) as CAEDMON
GRT : 761 / DWT : 180
Overall Length : 57.9 metres x Beam 15.7 metres.
Machinery : 2 Voith Schneider cycloidal propellers driven by a 6cyl Mirrlees Blackstone ERS6M turbocharged diesel engines
Speed : 10.0 knots
History POR = Port of Registry
1973: CAEDMON : Passro (Shipping) Co Ltd : POR London
1984: CAEDMON : Passtruck Shipping Co Ltd : POR London
1990: CAEDMON : WIGHTLink Ltd : POR London
2010: Sold to Smedegaarden and broken up at Esbjerg
CAEDMON photographed on 4 September 1989 in Spithead
Ship Details : Miramar / www.ferry-site.dk
CENRED - IMO : 7324091
Built 1973, by Robb Caledon Shipbuilder Ltd, Dundee , UK (Yard # 562) as CENRED
GRT : 761 / DWT : 180
Overall Length : 60.3 metres x Beam 15.7 metres.
Machinery : 2 Voith Schneider cycloidal propellers driven by a 6cyl Mirrlees Blackstone ERS6M turbocharged diesel engines
Speed : 10.0 knots
History POR = Port of Registry
1973: CENRED : Passro (Shipping) Co Ltd : POR London
1984: CENRED : Passtruck Shipping Co Ltd : POR London
1990: CENRED : WIGHTLink Ltd : POR London
2010: Sold to Smedegaarden and broken up at Esbjerg
CENRED photographed on 4 September 1989 in Spithead
Ship Details : Miramar / www.ferry-site.dk
Fidalgo Bay.
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
Guemes Channel.
Monday, February 6, 2017. Press release from WSDOT.
"Retired state ferry is sold to local business owner
SEATTLE – Washington State Ferries announced today the sale of its smallest retired ferry, Hiyu, to Menagerie Inc. The 50-year-old ferry officially changes hands Wednesday, Feb. 8, when it will be towed from the Eagle Harbor maintenance yard. The new owner plans to repurpose the vessel as a floating entertainment venue."
www.wsdot.wa.gov/news/2017/02/06/mv-baby-hiyu-gets-second...
The HIYU is the smallest ferry in the fleet, with a capacity of 34 cars and 200 passengers. The Hiyu was built in 1967 by Gunderson Brothers of Portland, Oregon. Washington State Ferries is a passenger and automobile ferry service owned and operated by the Washington State Department of Transportation that serves communities on Puget Sound and in the San Juan Islands. It is the largest passenger and automobile ferry fleet in the United States and the third largest in the world. Having carried 11 million vehicles annually, the service is also the largest in the world based on the number of vehicles carried.
Washington State Ferries (WSF) is a government agency that operates automobile and passenger ferry service in the U.S. state of Washington as part of the Washington State Department of Transportation. It runs ten routes serving 20 terminals located around Puget Sound and in the San Juan Islands, designated as part of the state highway system. The agency maintains the largest fleet of ferries in the United States at 22 vessels, carrying 24.2 million passengers in 2016. As of 2016, it was the largest ferry operator in the United States, and the fourth-largest ferry system in the world. Wikipedia
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
Friday, October 22, we walked 5km. Firstly, we took the clockwise route up-and-over Mt. Tolmie. This route gives one slightly more cardio exercise than our usual counterclockwise direction. Thus, it was Broadmead/Varsity Rd. outbound and up the gravel trail at the southern end of Gordon Head Road. We came down Iona which would have been our usual uphill, outbound route.
After lunch at our mess -- the third time this week -- we walked the Blue Bridge into town for a walkabout.
Today's picture is of a Canadian Navy Yard Tug Boat (YTB) undergoing repairs at Point Hope Shipyard beside the Galloping Goose Trail section along Harbour Road.
Grave stone of Lorenz Branren in Süderende, Föhr, Gernany
When Lorenz Konrad Braren was born in 1886, the son of an elementary school teacher on the North Friesian island of Föhr, no-one could have suspected that one day he would invent something that would attract attention all over the world. In the late 1920s, after several jobs in factories in the USA and Germany, the technology-mad engineer, who had in the meantime been taken on as the Head Designer at Friedrich Deckel in Munich, made use of his extensive experience to look into a completely new idea. The COMPUR shutter for cameras manufactured by Deckel inspired Lorenz Braren to come up with the idea for an innovative cycloid gearbox. In 1930 he registered the patent for a machine which was able to manufacture the cam discs for this gearbox with a high degree of precision. In so doing he created the basis for a completely new gearbox technology. The following year the inventor founded his own firm in Munich and the first Cyclo gearboxes were mass-produced. After a visit to the Leipzig trade fair in 1932, the first co-operation came about with the company that is today Sumitomo Heavy Industries, Ltd., who acquired a licence to build the Cyclo gearbox in Japan. Over 14 million examples of the Cyclo gearbox, which is now in its eight generation, have been supplied worldwide.
A look at how it works soon makes clear why this ingenious invention has been so successful. The name "CYCLO" - the unusual product name goes back to a employee vote -- stands for eccentric gearbox, whose cam outer profile describes a cycloidal curved line. When the eccentric rotates, it rolls the cam discs along the inner circumference of the fixed ring gear. While the cam discs move clockwise within the ring gear, at the same time they rotate anti-clockwise around their own axis. As they do so, the cycloidal teeth engage one after the other in the gaps between the rollers and so create a reverse rotation with reduced speed. The speed reducing gear ratio is determined by the number of cycloidal teeth on a disc. The reduced rotation is transmitted onto the output shaft via drive pins which engage in the holes of the cam discs. And as roller gears are placed both on the drive pins of the output shaft and on the drive pins of the ring gear, the transmission of torque can be a smoothly moving process. Cyclo gearboxes thus bring a whole lot of advantages with them: the operating principle leads to highly efficient, compact and easy to assemble gear combinations, which are characterised by high ratios, high shock load capacity, low inertia and low noise. With motor outputs from 0.12 to 55 kW and their high levels of precision, the gearboxes are suitable to a very wide variety of uses: they are to be found in printing presses, machine tools, robots, centrifuges, textile machines and in materials-handling technology, to name just a few of the applications.
The founder of the company died in 1953 at the age of 67. In 1974 the ten-year long co-operation led into Sumitomo Heavy Industries Ltd.'s involvement in Cyclo Getriebebau Lorenz Braren GmbH. Since 1993 the original Markt Indersdorf enterprise has been a 100% subsidiary of this Japanese engineering company and as Sumitomo (SHI) Cyclo Drive Germany GmbH continues to successfully translate Lorenz Konrad Braren's idea into reality. Today the Markt Indersdorf site is the European head office, from which a total of five European branch offices and sales offices in almost all the countries in Europe are coordinated. The parent company Sumitomo Heavy Industries Ltd. is continually expanding its commitment in the area of Cyclo gear technology and besides development, engineering and distribution will continue to invest in the production area in Europe.
CT Oxton VST tug of Carmet Tug Company departing Alfred Lock to head river south to Eastham while Shoalway TSHD awaits her return lock
Bollard Pull: 30t
Speed: 12.75 knots
IMO: 7703065
Vessel Type - Detailed: Tug
MMSI: 235040685
Call Sign: GZOZ
Flag: United Kingdom
Gross Tonnage: 249
Summer DWT: 119 t
Length Overall x Breadth Extreme: 30.64 x 9 m
Year Built: 1978
Registered owner & Ship Manager: CARMET TUG CO LTD
Shipyard: Richard Dunston LTD Shipbuilders, Hessle, UK
Hull Number: H.915
Main Engine: x2 Rolls Royce Allens 12 F/PBC 4t, 6cyls, @ 750 RPM - she was re-engined in 1989
Engine Power bhp: 1520 bhp
Total Power kW: 2206 kW
Draught: 4.55 metres
Propulsion: x2 Voith-Schneider/Cycloidal Prob LB (oil-closed) 5 @ 750 rpm
Aux Gen sets: x2 Cummins 6 BT5.9-B 87 kVA (70Kw), 415v 50Hz fitted in 2008
Fidalgo Bay/Guemes Channel
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
RMAS NORAH A205
Class……………………………Triton class water tractor
Builder………………………..Richard Dunston, Thorne
Yard number……………….T1310
Completed.………………….1973
Propulsion.…………………..1 shaft driven by a Lister-Blackstone ERS-4 oil engine
Speed..…………………………8 knots
Fate…………………………….2004: Sold to G. Baker Marine, name unchanged. Subsequently sold to Itchen Marine Towage and renamed WYEFUEL
•RMAS operated
•107 tons (fl) displacement / 50 grt
•3 ton bollard pull
•Voith vertical cycloidal propeller to provide instant mobility and full power in any direction.
RMAS NORAH seen towing fuel lighter 1501(F) through Portsmouth Harbour on 26 April 1988
The Woolwich Ferry's current three vessels were built in Dundee in 1963 by the Caledon Shipbuilding & Engineering Company to replace paddle steamers, and were each named after prominent local politicians: John Burns, Ernest Bevin and James Newman (Newman was mayor of Woolwich, 1923–25).
These ferries feature Voith-Schneider propulsion systems for manoeuvrability. A cycloidal propeller is fitted centrally at either end, and each is driven by a 500bhp 7-cylinder Mirrlees National diesel engine.
Various pens on paper. Drawn with my prototype Cycloidal Scribbling-Engine, also using a regular spirograph. About 6" across.
Los Angeles Fireboat #2
Length (Overall) ................ 114’-10” Beam .................................. 32’-9” Depth ................................. 13’-4” Draft .................................. 6’-11” Fuel Capacity ............ 4,800 Gallons Fresh Water Capacity .... 750 Gallons Crew Capacity ............................ 6 Firefighters .............................. 12
Specifications:
Main Engines ................. 2 x MTU/DDC 12V-4000 @ 1800 HP each Auxiliary Engines ............................... Lugger MP 150C @ 150 KW Propulsion .................................. Voith Schneider Cycloidal Drives Speed ........................................................................ 15 Knots Fire Monitors ... 10 Unitor/Skum FI-FI Systems @ 38,000 GPM total
• • •
Deck Equipment:
One Towline Reel Two Mooring Capstans One Alaska Marine Crane: Model 1550 with 50 FT Telescoping Boom
Wightlinks new car ferry MV Victoria Of Wight about to enter Portsmouth Harbour on Friday 23 November 2018.
Identification:
IMO number: 9791028
MMSI number: 232015630
Callsign: MDCW6
Builder: Cemre Shipyard, Yalova.
Launched: 7 February 2018.
In service: 26 August 2018.
Class and type: Car Passenger Ferry (Victoria of Wight G Class)
Tonnage: 8041 gross
Length: 89.7 m (294.3 ft)
Beam: 19.4 m (63.6 ft)
Draught: 2.6 m (8.5 ft)
Propulsion: Diesel-electric/ battery hybrid system. 4x 6-cyl Wärtsilä L20/28 diesel engines driving generators, 4 Voith Schneider 5-bladed cycloidal propellers driven by electric motors.
Speed: 13 knots (24 km/h; 15 mph)
Capacity: 1208 passengers, 178 cars
Crew: 11
The Woolwich Ferry is a free vehicle ferry service across the River Thames in East London, connecting Woolwich to the south with North Woolwich to the north. It is licensed and financed by London River Services, the maritime arm of Transport for London (TfL). The service is operated by Briggs Marine under licence from TfL and carries both foot passengers and vehicles. Around two million passengers use the ferry each year.
There has been a ferry operating in Woolwich since the 14th century, and commercial crossings operated intermittently until the mid-19th century. The free service opened in 1889, following the abolition of tolls across bridges to the west of London. Traffic increased in the 20th century owing to the rise in motor vehicle use, and because of the lack of nearby fixed crossings of the Thames it has remained popular, although pedestrian use has dropped as a result of the construction of a parallel foot tunnel and the extension of the Docklands Light Railway through to Woolwich Arsenal station. Alternatives such as the Thames Gateway Bridge and the Gallions Reach Crossing have been proposed as replacements, but there are no immediate plans to discontinue the Woolwich Ferry as long as there is a demand.
The current three vessels were built in Dundee in 1963 by the Caledon Shipbuilding & Engineering Company, to replace the paddle steamers, and were each named after prominent local politicians: John Burns, Ernest Bevin and James Newman (Newman was mayor of Woolwich, 1923–25). These ferries feature Voith-Schneider propulsion systems for manoeuvrability. A cycloidal propeller is fitted centrally at either end, and each is driven by a 500bhp 7-cylinder Mirrlees National diesel engine.
The Woolwich Ferry is a free vehicle ferry service across the River Thames in East London, connecting Woolwich to the south with North Woolwich to the north. It is licensed and financed by London River Services, the maritime arm of Transport for London (TfL). The service is operated by Briggs Marine under licence from TfL and carries both foot passengers and vehicles. Around two million passengers use the ferry each year.
There has been a ferry operating in Woolwich since the 14th century, and commercial crossings operated intermittently until the mid-19th century. The free service opened in 1889, following the abolition of tolls across bridges to the west of London. Traffic increased in the 20th century owing to the rise in motor vehicle use, and because of the lack of nearby fixed crossings of the Thames it has remained popular, although pedestrian use has dropped as a result of the construction of a parallel foot tunnel and the extension of the Docklands Light Railway through to Woolwich Arsenal station. Alternatives such as the Thames Gateway Bridge and the Gallions Reach Crossing have been proposed as replacements, but there are no immediate plans to discontinue the Woolwich Ferry as long as there is a demand.
The current three vessels were built in Dundee in 1963 by the Caledon Shipbuilding & Engineering Company, to replace the paddle steamers, and were each named after prominent local politicians: John Burns, Ernest Bevin and James Newman (Newman was mayor of Woolwich, 1923–25). These ferries feature Voith-Schneider propulsion systems for manoeuvrability. A cycloidal propeller is fitted centrally at either end, and each is driven by a 500bhp 7-cylinder Mirrlees National diesel engine.
Galveston 04/24/17
Ferry - Dewitt C Greer - Galveston TX - Texas Department of Transportation - 1995 -
265' x 66' 70 automobile capacity- Maroon & White - Cycloidal Drive and
CENWULF - IMO : 7320021
Built 1973, by Robb Caledon Shipbuilder Ltd, Dundee , UK (Yard # 561) as CENWULF
GRT : 761 / DWT : 175
Overall Length : 60.3 metres x Beam 15.7 metres.
Machinery : 2 Voith Schneider cycloidal propellers driven by a 6cyl Mirrlees Blackstone ERS6M turbocharged diesel engines
Speed : 10.0 knots
History POR = Port of Registry
1973: CENWULF : Passro (Shipping) Co Ltd : POR London
1984: CENWULF : Passtruck Shipping Co Ltd : POR London
1990: CENWULF : WIGHTLink Ltd : POR London
2010: Sold to Smedegaarden and broken up at Esbjerg
CENWULF photographed on 4 September 1989 in Spithead
Ship Details : Miramar / www.ferry-site.dk
Guemes Channel.
The tugboat Response was built in 2002 by Marco Shipbuilding specifically for the escort and assist of oil tankers in Puget Sound, designed with high performance features like cycloidal propulsion and an asymmetric render-recover (ARR) winch system for dynamic braking and load control
Remorqueur côtier Voith-Schneider (RCVS)
Durée de vie 30 ans
Missions
Les 3 RC type Bélier assurent les missions suivantes :
Remorquage portuaire des grands bâtiments de combat ;
Remorquage de mer ;
Surveillance des champs de tir ;
Lutte antipollution (mise en place de barrages)
Assistance en mer ;
Concours pour l'entraînement au treuillage en mer des hélicoptères ;
Missions de représentation.
Caractéristiques
Longueur : 31,78 mètres
Largeur : 9,24 mètres
Tirant d'eau : 4,30 mètres
Tirant d'air : 17 mètres
Déplacement : 356 tonnes et 500 tonnes en pleine charge
Vitesse : 12 nœuds
Distance franchissable : 3.900 nautiques à 10 nœuds
Autonomie : 15 jours
Énergie et propulsion
2 moteurs diesels SACM-Wärtsilä UD 33 V 12 M 4
2 propulseurs cycloïdaux Voight-Schneider - 2.600 ch (1.912 kW)
Puissance électrique 160 kW
Armement
Néant
Équipements électroniques
1 radar Racal-Decca C 180-4
Système de transmissions par satellite Inmarsat mini M
Équipement
Mâture repliable
1 canon à eau
Équipage
1 officier
7 officiers mariniers
4 quartiers-maîtres et matelots
Source: www.defense.gouv.fr/marine/decouverte/equipements-moyens-...
Voith Schneider Propeller (VSP) cycloidal propeller.
"The Voith Schneider propeller (VSP), also known as a cycloidal drive (CD) is a specialized marine propulsion system (MPS). It is highly manoeuvrable, being able to change the direction of its thrust almost instantaneously. It is widely used on tugs and ferries.
From a circular plate, rotating around a vertical axis, a circular array of vertical blades (in the shape of hydrofoils) protrude out of the bottom of the ship. Each blade can rotate itself around a vertical axis. The internal gear changes the angle of attack of the blades in sync with the rotation of the plate, so that each blade can provide thrust in any direction, very similar to the collective pitch control and cyclic in a helicopter." -- Wikipedia
Carmet's CT Oxton VST tug assist LM Constructor barge into Cammell Laird shipyard dry dock 6
CT Oxton
Bollard Pull: 30t
Speed: 12.75 knots
IMO: 7703065
Vessel Type - Detailed: Tug
MMSI: 235040685
Call Sign: GZOZ
Flag: United Kingdom
Gross Tonnage: 249
Summer DWT: 119 t
Length Overall x Breadth Extreme: 30.64 x 9 m
Year Built: 1978
Registered owner & Ship Manager: CARMET TUG CO LTD
Shipyard: Richard Dunston LTD Shipbuilders, Hessle, UK
Hull Number: H.915
Main Engine: x2 Rolls Royce Allens 12 F/PBC 4t, 6cyls, @ 750 RPM - she was re-engined in 1989
Engine Power bhp: 1520 bhp
Total Power kW: 2206 kW
Draught: 4.55 metres
Propulsion: x2 Voith-Schneider/Cycloidal Prob LB (oil-closed) 5 @ 750 rpm
Aux Gen sets: x2 Cummins 6 BT5.9-B 87 kVA (70Kw), 415v 50Hz fitted in 2008
The Crowley ship assist tug, Guide, deadheading south at high speed. She was built in 1998 and has two Voith-Schneider cycloidal drives and is rated at 4,800 hp.
Fidalgo Bay
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
Guemes Channel
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
Framed by the rounded roof of the LA City fireboat station, 3 Crowley Maritime tractor tugs: Scout, Master, and Admiral (Leader is just out of frame). The size is not really apparent until you compare it to the Tug skipper in the center window .
From Crowley's website: (Los Angeles, Calif.; June 16, 2010)—Crowley Maritime Corporation has reintroduced four re-powered Harbor class tugs to its ship assist and tanker escort fleet in the Ports of Los Angeles and Long Beach. The tugs Admiral, Leader, Scout and Master each underwent an extensive re-powering as part of an emissions and air quality initiative program by the Port of Los Angeles.
Six of these Harbor class tractor tugs were built in1998-99, by Nichols Brothers Boatbuilders of Freeland, for Crowley Marine Services (The other 2 are Chief and Guide). Powered by two 2,400 horsepower diesel engines with a Voith Schneider cycloidal drive for a rated 4,800 horsepower.
Carmet's CT Oxton VST tug assist LM Constructor barge through Alfred Dock into the East Float to Vittoria Wharf
Bollard Pull: 30t
Speed: 12.75 knots
IMO: 7703065
Vessel Type - Detailed: Tug
MMSI: 235040685
Call Sign: GZOZ
Flag: United Kingdom
Gross Tonnage: 249
Summer DWT: 119 t
Length Overall x Breadth Extreme: 30.64 x 9 m
Year Built: 1978
Registered owner & Ship Manager: CARMET TUG CO LTD
Shipyard: Richard Dunston LTD Shipbuilders, Hessle, UK
Hull Number: H.915
Main Engine: x2 Rolls Royce Allens 12 F/PBC 4t, 6cyls, @ 750 RPM - she was re-engined in 1989
Engine Power bhp: 1520 bhp
Total Power kW: 2206 kW
Draught: 4.55 metres
Propulsion: x2 Voith-Schneider/Cycloidal Prob LB (oil-closed) 5 @ 750 rpm
Aux Gen sets: x2 Cummins 6 BT5.9-B 87 kVA (70Kw), 415v 50Hz fitted in 2008
Fidalgo Bay
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
Carmet's CT Oxton VST tug assist LM Constructor barge into Cammell Laird shipyard dry dock 6
CT Oxton
Bollard Pull: 30t
Speed: 12.75 knots
IMO: 7703065
Vessel Type - Detailed: Tug
MMSI: 235040685
Call Sign: GZOZ
Flag: United Kingdom
Gross Tonnage: 249
Summer DWT: 119 t
Length Overall x Breadth Extreme: 30.64 x 9 m
Year Built: 1978
Registered owner & Ship Manager: CARMET TUG CO LTD
Shipyard: Richard Dunston LTD Shipbuilders, Hessle, UK
Hull Number: H.915
Main Engine: x2 Rolls Royce Allens 12 F/PBC 4t, 6cyls, @ 750 RPM - she was re-engined in 1989
Engine Power bhp: 1520 bhp
Total Power kW: 2206 kW
Draught: 4.55 metres
Propulsion: x2 Voith-Schneider/Cycloidal Prob LB (oil-closed) 5 @ 750 rpm
Aux Gen sets: x2 Cummins 6 BT5.9-B 87 kVA (70Kw), 415v 50Hz fitted in 2008
Fidalgo Bay.
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
Fidalgo Bay
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
Early Morning Fidalgo Bay
Lindsey Foss and Garth Foss are Enhanced Tractor Tugs, and were the largest in the world (when built in 1994), featuring Voith Schneider cycloidal propulsion systems. and are specifically designed for tanker escorts.
330-PSA-9-63 (USN 711226): LCU-1620 is craft of the LCU-1600 class fitted with vertical-axis (cycloidal), propellers, equipped with two six-blade, controllable pitch, 500 horsepower propellers. The LCU-1620 is steered by shifting the direction of thrust of both propellers simultaneously. In tests the LCU-1620 stopped completely in three quarters of her length from a full speed of more than 11 knots. She turned a complete circle in still water in less than 10 seconds, fully loaded, she retracted, turned around, and came out over a sandbar bow on. Shown is a diagram of the directions of travel. Photograph released January 15, 1963. (2015/10/13).
Port of Los Angeles, California. Berthed next to the Los Angeles Maritime Museum in San Pedro. Operated by Crowley Marine, the 4800-hp, 96-foot tractor tugs (r to l) 'Master', 'Leader', and 'Scout' towing vessels.
56.2.0.5.27.12.thenaddedtoPNWT's
The Woolwich Ferry's current three vessels were built in Dundee in 1963 by the Caledon Shipbuilding & Engineering Company to replace paddle steamers, and were each named after prominent local politicians: John Burns, Ernest Bevin and James Newman (Newman was mayor of Woolwich, 1923–25).
These ferries feature Voith-Schneider propulsion systems for manoeuvrability. A cycloidal propeller is fitted centrally at either end, and each is driven by a 500bhp 7-cylinder Mirrlees National diesel engine.
Various pens on paper. Drawn with my prototype Cycloidal Scribbling-Engine, also using a regular spirograph. About 6" across.
330-PSA-9-63 (USN 711223): LCU-1620 is craft of the LCU-1600 class fitted with vertical-axis (cycloidal), propellers, equipped with two six-blade, controllable pitch, 500 horsepower propellers. The LCU-1620 is steered by shifting the direction of thrust of both propellers simultaneously. In tests the LCU-1620 stopped completely in three quarters of her length from a full speed of more than 11 knots. She turned a complete circle in still water in less than 10 seconds, fully loaded, she retracted, turned around, and came out over a sandbar bow on. Photograph released January 15, 1963. (2015/10/13).
Six of these Harbor class tractor tugs were built in1998-99, by Nichols Brothers Boatbuilders of Freeland, for Crowley Marine Services. Powered by two 2,400 horsepower diesel engines with a Voith Schneider cycloidal drive for a rated 4,800 horsepower.
"San Pedro, California" "Port of LA" "Port of Los Angeles" "Tractor Tug" "Crowley Marine" Harbor Waterfront