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Oh yeah, glowing vacuum tubes in a digital radio. Nice. . . . . . . . . . . . . We got caught on the other side of the water rolling into rush hour a few days ago, so we decided to kill time meandering around Best Buy. We were originally going to see about a new battery backup for my computer, but my wife saw a home theater speaker set on sale and somehow we found ourselves on a quest to replace the speakers in the office. Naturally we looked at the Bose first, and then all the other component systems they had. None of them felt like they sounded as good as their prices indicated they should have. Then, while looking at something completely different, I turned around and saw these beautiful little black boxes on the shelf with flashing blue "demo" buttons begging to be pressed;.....and press I did. Wow, that was exactly what we were looking for. It sounded amazing. It's two smaller siblings weren't even close. Naturally I had to get my wife to give the button a press as well. Even though the demo was a slow jazz horn solo, she started giggling. Granted the $600 price tag dampened our enthusiasm a wee bit, but no problem;......when I turned around to take a second look at the system we had originally been contempating, what was underneath it? A, discounted, open box Samsung DA-E751; for $150 off! WOOT! It was a done deal. Not only does this thing sound phenomenal, but I can link it to my phone via Bluetooth and let Pandora or my Amazon Cloud Player stream wirelessly. Brilliant! Oh yeah, did I mention the vacuum tubes? If glowing vacuum tubes don't tickle your inner geek I don't know what will.
Now that we have carpet for the first time, we need a vacuum for the first time. Behold the lovely little Miele, which nicely sucks up all of the fuzzy bits of wool which the new carpet is prone to shed.
the vacuum wave.
this landart made olive branches represent the void created when the wave reaches the shore.
made for Land-Art Connections Group for September theme emptiness/vacuum.
+++ DISCLAIMER +++
Nothing you see here is real, even though the conversion or the presented background story might be based historical facts. BEWARE!
Some background:
The Douglas F3D Skyknight (later designated F-10 Skyknight) was a United States twin-engined, mid-wing jet fighter aircraft manufactured by the Douglas Aircraft Company in El Segundo, California. The F3D was designed as a carrier-based all-weather night fighter and saw service with the United States Navy and United States Marine Corps. The mission of the F3D-2 was to search out and destroy enemy aircraft at night.
The F3D was not intended to be a typical sleek and nimble dogfighter, but as a standoff night fighter, packing a powerful radar system and a second crew member. It originated in 1945 with a US Navy requirement for a jet-powered, radar-equipped, carrier-based night fighter. The Douglas team led by Ed Heinemann designed around the bulky air intercept radar systems of the time, with side-by-side seating for the pilot and radar operator. The result was an aircraft with a wide, deep, and roomy fuselage. Instead of ejection seats, an escape tunnel was used.
As a night fighter that was not expected to be as fast as smaller daylight fighters, the expectation was to have a stable platform for its radar system and the four 20 mm cannon mounted in the lower fuselage. The F3D was, however, able to outturn a MiG-15 in an inside circle. The fire control system in the F3D-1 was the Westinghouse AN/APQ-35.
The AN/APQ-35 was advanced for the time, a combination of three different radars, each performing separate functions: an AN/APS-21 search radar, an AN/APG-26 tracking radar, both located in the nose, and an AN/APS-28 tail warning radar. The complexity of this vacuum tube-based radar system, which was produced before the advent of semiconductor electronics, required intensive maintenance to keep it operating properly.
The F3D Skyknight was never produced in great numbers but it did achieve many firsts in its role as a night fighter over Korea. While it never achieved the fame of the North American F-86 Sabre, it did down several Soviet-built MiG-15s as a night fighter over Korea with only one air-to-air loss of its own against a Chinese MiG-15 on the night of 29 May 1953.
In the years after the Korean War, the F3D was gradually replaced by more powerful aircraft with better radar systems. The F3D's career was not over though; its stability and spacious fuselage made it easily adaptable to other roles. The Skyknight played an important role in the development of the radar-guided AIM-7 Sparrow missile in the 1950s which led to further guided air-to-air missile developments.
In 1954, the F3D-2M was the first U.S. Navy jet aircraft to be fitted with an operational air-to-air missile: the Sparrow I,an all weather day/night BVR missile that used beam riding guidance for the aircrew to control the flight of the missile. Only 38 aircraft (12 F3D-1Ms, and 16 F3D-2Ms) were modified to use the missiles, though.
One of the F3D's main flaws, which it shared with many early jet aircraft, was its lack of power and performance. Douglas tried to mend this through a radical redesign: The resulting F3D-3 was the designation assigned to a swept-winged version (36° sweep at quarter chord) of the Skyknight. It was originally to be powered by the J46 turbojet, rated at 4.080 lbf for takeoff, which was under development but suffered serious trouble.
This led to the cancellation of the J46, and calculated performance of the F3D-3 with the substitute J34 was deemed insufficient. As an alternative the aircraft had to be modified to carry two larger and longer J47-GE-2 engines, which also powered the USN's FJ-2 "Fury" fighter.
This engine's thrust of 6.000 pounds-force (27 kN) at 7,950 rpm appeared sufficient for the heavy, swept-wing aircraft, and in 1954 an order for 287 production F3D-3s was issued, right time to upgrade the new type with the Sparrow I.
While the F3D-3's outline resembled that of its straight wing predecessors, a lot of structural changes had to be made to accommodate the shifted main wing spar, and the heavy radar equipment also took its toll: the gross weight climbed by more than 3 tons, and as a result much of the gained performance through the stronger engines and the swept wings was eaten away.
Maximum internal fuel load was 1.350 US gallons, plus a further 300 in underwing drop tanks. Overall wing surface remained the same, but the swept wing surfaces reduced the wing span.
In the end, thrust-to-weight ratio was only marginally improved and in fact, the F3D-3 had a lower rate of climb than the F3D-2, its top speed at height was only marginally higher, and stall speed climbed by more than 30 mph, making carrier landings more complicated.
It's equipment was also the same - the AN/APQ-35 was still fitted, but mainly because the large radar dish offered the largest detection range of any carrier-borne type of that time, and better radars that could match this performance were still under construction. Anyway, the F3D-3 was able to carry Sparrow I from the start, and this would soon be upgraded to Sparrow III (which became the AIM-7), and it showed much better flight characteristics at medium altitude.
Despite the ,many shortcomings the "new" aircraft represented an overall improvement over the F3D-2 and was accepted for service. Production of the F3D-3 started in 1955, but technology advanced quickly and a serious competitor with supersonic capability appeared with the McDonnell F3H Demon and the F4D Skyray - much more potent aircraft that the USN immediately preferred to the slow F3Ds. As a consequence, the production contract was cut down to only 102 aircraft.
But it came even worse: production of the swept wing Skyknight already ceased after 18 months and 71 completed airframes. Ironically, the F3D-3's successor, the F3H and its J40 engine, turned out to be more capricious than expected, which delayed the Demon's service introduction and seriously hampered its performance, so that the F3D-3 kept its all weather/night fighter role until 1960, and was eventually taken out of service in 1964 when the first F-4 Phantom II fighters appeared in USN service.
In 1962 all F3D versions were re-designated into F-10, the swept wing F3D-3 became the F-10C. The straight wing versions were used as trainers and also served as an electronic warfare platform into the Vietnam War as a precursor to the EA-6A Intruder and EA-6B Prowler, while the swept-wing fighters were completely retired as their performance and mission equipment had been outdated. The last F-10C flew in 1965.
General characteristics
Crew: two
Length: 49 ft (14.96 m)
Wingspan: 42 feet 5 inches (12.95 m)
Height: 16 ft 1 in (4.90 m)
Wing area: 400 ft² (37.16 m²)
Empty weight: 19.800 lb (8.989 kg)
Loaded weight: 28,843 lb (13.095 kg)
Max. takeoff weight: 34.000 lb (15.436 kg)
Powerplant:
2× General Electric J47-GE-2 turbojets, each rated at 6.000 lbf (26,7 kN) each
Performance
Maximum speed: 630 mph (1.014 km/h) at sea level, 515 mph (829 km/h) t (6,095 m)
Cruise speed: 515 mph (829 km/h) at 40,000 feet
Stall speed: 128 mph (206 km/h)
Range: 890 mi (1.433 km) with internal fuel; 1,374 mi, 2,212 km with 2× 300 gal (1.136 l) tanks
Service ceiling: 43.000 ft (13.025 m)
Rate of climb: 2,640 ft/min (13,3 m/s)
Wing loading: 53.4 lb/ft² (383 kg/m²)
Thrust/weight: 0.353
Armament
4× 20 mm Hispano-Suiza M2 cannon, 200 rpg, in the lower nose
Four underwing hardpoints inboard of the wing folding points for up to 4.000 lb (1.816 kg)
ordnance, including AIM-7 Sparrow air-to-air missiles, 11.75 in (29.8cm) Tiny Tim rockets, two
150 or 300 US gal drop tanks or bombs of up to 2.000 lb (900 kg) caliber, plus four hardpoints
under each outer wing for a total of eight 5" HVARs or eight pods with six 2 3/4" FFARs each
The kit and its assembly:
Another project which had been on the list for some years now but finally entered the hardware stage. The F3D itself is already a more or less forgotten aircraft, and there are only a few kits available - there has been a vacu kit, the Matchbox offering and lately kits in 1:72 and 1:48 by Sword.
The swept wing F3D-3 remained on the drawing board, but would have been a very attractive evolution of the tubby Skyknight. In fact, the swept surfaces resemble those of the A3D/B-66 a Iot, and this was the spark that started the attempt to build this aircraft as a model through a kitbash.
This model is basically the Matchbox F3D coupled with wings from an Italeri B-66, even though, being much bigger, these had to be modified.
The whole new tail is based on B-66 material. The fin's chord was shortened, though, and a new leading edge (with its beautiful curvature) had to be sculpted from 2C putty. The vertical stabilizers also come from the B-66, its span was adjusted to the Skyknight's and a new root intersection was created from styrene and putty, so that a cross-shaped tail could be realized.
The tail radar dish was retained, even though sketches show the F3D-3 without it.
The wings were take 1:1 from the B-66 and match well. They just had to be shortened, I set the cut at maybe 5mm outwards of the engine pods' attachment points. They needed some re-engraving for the inner flaps, as these would touch the F3D-3's engines when lowered, but shape, depth and size are very good for the conversion.
On the fuselage, the wings' original "attachment bays" had to be filled, and the new wings needed a new position much further forward, directly behind the cockpit, in order to keep the CoG.
One big issue would be the main landing gear. On the straight wing aircraft it retracts outwards, and I kept this arrangement. No detail of the exact landing gear well position was available to me, so I used the Matchbox parts as stencils and placed the new wells as much aft as possible, cutting out new openings from the B-66 wings.
The OOB landing gear was retained, but I added some structure to the landing gear wells with plastic blister material - not to be realistic, just for the effect. A lot of lead was added in the kit's nose section, making sure it actually stands on the front wheel.
The Matchbox Skyknight basically offers no real problems, even though the air intake design leaves, by tendency some ugly seams and even gaps. I slightly pimped the cockpit with headrests, additional gauges and a gunsight, as well as two (half) pilot figures. I did not plan to present the opened cockpit and the bulbous windows do not allow a clear view onto the inside anyway, so this job was only basically done. In fact, the pilots don't have a lower body at all...
Ordnance comprises of four Sparrow III - the Sparrow I with its pointed nose could have been an option, too, but I think at the time of 1960 the early version was already phased out?
Painting and markings:
This was supposed to become a typical USN service aircraft of the 60ies, so a grey/white livery was predetermined. I had built an EF-10B many years ago from the Matchbox kit, and the grey/white guise suits the Whale well - and here it would look even better, with the new, elegant wings.
For easy painting I used semi matt white from the rattle can on the lower sides (painting the landing gear at the same time!), and then added FS 36440 (Light Gull Grey, Humbrol 129) with a brush to the upper sides. The radar nose became semi matt black (with some weathering), while the RHAWS dish was kept in tan (Humbrol 71).
In order to emphasize the landing gear and the respective wells I added a red rim to the covers.
The cockpit interior was painted in dark grey - another factor which made adding too many details there futile, too...
The aircraft's individual marking were to be authentic, and not flamboyant. In the mid 50ies the USN machines were not as colorful as in the Vietnam War era, that just started towards the 60ies.
The markings I used come primarily from an Emhar F3H Demon, which features no less than four(!) markings, all with different colors. I settled for a machine of VF-61 "Jolly Rogers", which operated from the USS Saratoga primarily in the Mediterranean from 1958 on - and shortly thereafter the unit was disbanded.
I took some of the Demon markings and modified them with very similar but somewhat more discrete markings from VMF-323, which flew FJ-4 at the time - both squadrons marked their aircraft with yellow diamonds on black background, and I had some leftover decals from a respective Xtradecal sheet in the stash.
IMHO a good result with the B-66 donation parts, even though I am not totally happy with the fin - it could have been more slender at the top, and with a longer, more elegant spine fillet, but for that the B-66 fin was just too thick. Anyway, I am not certain if anyone has ever built this aircraft? I would not call the F3D-3 elegant or beautiful, but the swept wings underline the fuselage's almost perfect teardrop shape, and the thing reminds a lot of the later Grumman A-6 Intruder?
A vacuum tube and continuity tester using a neon bulb.
I don't know how well these can diagnose a tube, probably sold as a gimmick.
Hardcore Entomology:
The Wednesday Shropshire natural history explorers group hard at it in freezing conditions. Poles Coppice, Shropshire. 14 December 2022.
L-R Keith Fowler, Neil Nash, Jim Cresswell, Nigel Jones
Photo by John Martin
It's shedding season, so a good brushing was in order. Well one thing led to another, and Lenny actually seemed to quite enjoy getting vacuumed.
I was given this rather jolly vacuum flask by my grand-daughters a few years ago 😀
This photograph, which comes to you by courtesy of the letter V, is my twenty-second picture for the February Alphabet Fun: 2020 group.
Pure sound A30 Vacuum tube amplifier
Lighting:
Camera left: Yongnuo Speedlite YN560 1/4 trough diffusion paper
Camera right: Yongnuo Speedlite YN560 1/4 trough diffusion paper
Above: Nikon SB900 1/16 bounced of roof
He's getting his routine vacuum grooming/massage. Hard to believe a boy who is terrified of all noises and strangers loves his vacuum. 😍
24 009 was new to traffic in March 1959 as D5009 and spent most of its service life at a number of depots around England. It was allocated to Eastfield Depot in March 1971 but was sent to Haymarket to be stored in September of 1975. It was officially withdrawn in July 1976.
27 105 was new to traffic as D5388 in May 1962 and spent its first six years in service based in the English midlands. In the early 1970s it was transferred to Eastfield Depot and fitted with dual (vacuum and air) brakes for work on the (then) newly introduced Class 27 E&G push-pull services. It was reclassified 27 105 in January 1973.
The locomotive was renumbered 27 049 in August 1983 and withdrawn in April 1987.
Op een rioolwaterzuivering hebben we een lavafilter leeg gemaakt.
Op deze rioolwaterzuivering wordt overal lucht afgezogen die vrij komt bij de behandeling van het rioolwater.
Deze lava filters worden gebruikt om de stank in de lucht af te breken zodat de omwonende geen last hebben van vieze geuren.
In dit filter zit 60m3 aan lavastenen en tussen die lavastenen groeien bacteriën, en die zorgen voor het afbreken van de stank.
Het leegmaken gebeurt met een grote zuigwagen zoals hier te zien is op de foto's
At a sewage treatment plant, we emptied a lava filter.
At this sewage treatment plant, air is extracted everywhere that is released when sewage is treated.
These lava filters are used to break down the stench in the air so that nearby residents are not bothered by foul odors.
This filter contains 60m3 of lava rocks and bacteria grow between those lava rocks, and they take care of breaking down the smell.
Emptying is done with a large vacuum truck as shown here in the pictures
Shop for the Miele GN Vacuum Bags, Vacuum Cleaner Bags and G/N 3D Vacuum Bags with 3 Boxes online at Broadway. Find products from Miele with the lowest prices. Call +1-925-280-4448.
Strangely enough, there is no vacuum store in the direction the arrow points. It's actual down at the other end of this older plaza.
50042 at Boscarne Junction with the 14.35 from Bodmin General . Suitably refreshed at the Hole In The Wall I decided on a second visit to here before returning at 15.03 to Bodmin Parkway where the train would run round at Bodmin General between 15.15 and 15.45, depositing me back on the main line at 16.02 for the 16.31 HST back to Plymouth. What could possibly go wrong ? Well once 50042 was uncoupled it was found to be unable to operate it's vacuum braking on the stock. Class 50s were known as 'Hoovers' prior to refurbishment due to the distinctive, loud sound produced by their air intake fans, which resembled the noise of a vacuum cleaner. This nickname stuck as did the alternative 'vacuums' which I always found tended to be used by those who were not big fans of the class, myself included. I didn't dislike them however I hasten to add. Anyway 50042 could not return on the train and after much deliberating and radio calls it was sent light back to General and we were informed that 47306 would be on its way in 25 minutes to rescue us. It duly arrived and we left at 15.50. Some smart working at General and 47306 was on its way at 16.12 and a quick trundle downhill to Bodmin Parkway saw us arrive at 16.20 and my 16.31 HST was 10 late. Huzzah.
S73-23952 (May 1973) --- This is the official emblem for the National Aeronautics and Space Administration's (NASA) Skylab Program. The emblem depicts the United States Skylab space station cluster in Earth orbit with the sun in the background. Skylab will evaluate systems and techniques designed to gather information on Earth resources and environmental problems. Solar telescopes will increase man's knowledge of our sun and the multitude of solar influences on Earth environment. Medical experiments will increase knowledge of man himself and his relationship to his earthly environment and adaptability to spaceflight. Additionally, Skylab will experiment with industrial processes which may be enhanced by the unique weightless, vacuum environment of orbital spaceflight. The 100-ton laboratory complex Skylab space station is composed of the Command/Service Module (CSM), Orbital Workshop (OW), Apollo Telescope Mount (ATM), Multiple Docking Adapter (MDA), and Airlock Module (AM).
The NASA insignia design for Skylab is reserved for use by the astronauts and for other official use as the NASA Administrator may authorize. Public availability has been approved only in the form of illustrations by the various news media. When and if there is any change in this policy, which we do not anticipate, it will be publicly announced. Photo credit: NASA
Vacuum
: an empty space in which there is no air or other gas : a space from which all or most of the air has been removed
: a space not filled or occupied; emptiness; void
: a situation created when an important person or thing has gone and has not been replaced
It is a shame I did not keep them all... Various models of vacuum tubes from 1935 till the late sixties....
This is a 1990s-ish Electrolux vacuum cleaner. We got a new one so I'm passing it on. The brush attachment doesn't work, but the hose part is a-ok. Free to whoever wants it.