Nu dat de Reppu af is en de Ginga richting schilder-stadium beweegt, dacht ik dat het eens tijd was voor (nog) wat anders: Een toestel dat werkelijk niet mag ontbreken in deze groepsbouw, omdat het zo ongeveer
Het Japanse Luft '46 toestel is.
Ofwel de Kyushu J7W Shinden. Canard. Prop en motor achterin. Vleugel in pijlstand. Zeer aparte verschijning. En een jet-versie die gepland was maar nooit is geproduceerd.
De Engelse Wikipedia vertelt ons:
Citaat:
The Kyūshū J7W1 Shinden (震電, "Magnificent Lightning") fighter was a World War II Japanese propeller-driven aircraft prototype with wings at the rear of the fuselage, a nose-mounted canard, and pusher engine.
Developed by the Imperial Japanese Navy (IJN) as a short-range, land-based interceptor, the J7W was a response to Boeing B-29 Superfortress raids on the Japanese home islands. For interception missions, the J7W was to be armed with four forward-firing 30 mm cannons in the nose.
The Shinden was expected to be a highly maneuverable interceptor, but only two prototypes were finished before the end of war. A jet engine–powered version was considered, but never even reached the drawing board.
Design and development
In the IJN designation system, "J" referred to land-based fighters and "W" to Watanabe Tekkōjo, the company that oversaw the initial design.
The idea of a canard-based design originated with Lieutenant Commander Masayoshi Tsuruno, of the technical staff of the IJN in early 1943. Tsuruno believed the design could easily be retrofitted with a turbojet, when suitable engines became available. His ideas were worked out by the First Naval Air Technical Arsenal (Dai-Ichi Kaigun Koku Gijitsusho), which designed three gliders designated Yokosuka MXY6, featuring canards. These were built by Chigasaki Seizo K. K. and one was later fitted with a 22 hp Semi 11 (Ha-90) 4-cylinder air-cooled engine.
The feasibility of the canard design was proven by both the powered and unpowered versions of the MXY6 by the end of 1943, and the Navy were so impressed by the flight testing, they instructed the Kyushu Aircraft Company to design a canard interceptor around Tsuruno's concept. Kyushu was chosen because both its design team and production facilities were relatively unburdened, and Tsuruno was chosen to lead a team from Dai-Ichi Kaigun Koku Gijitsusho to aid Kyushu's design works.
The construction of the first two prototypes started in earnest by June 1944, stress calculations were finished by January 1945, and the first prototype was completed in April 1945. The 2,130 hp Mitsubishi MK9D (Ha-43) radial engine and its supercharger were installed behind the cockpit and drove a six-bladed propeller via an extension shaft. Engine cooling was to be provided by long, narrow, obliquely mounted intakes on the side of the fuselage. It was this configuration that caused cooling problems while running the engine while it was still on the ground. This, together with the unavailability of some equipment parts postponed the first flight of the Shinden.
Even before the first prototype took to the air, the Navy ordered the J7W1 into production, with a quota of 30 Shinden a month given to Kyushu's Zasshonokuma factory and 120 from Nakajima's Handa plant. It was estimated some 1,086 Shinden could be produced between April 1946 and March 1947.
On 3 August 1945, the prototype first flew, with Tsuruno at the controls, from Itazuke Air Base. Two more short flights were made, a total of 45 minutes airborne, one each on the same days as the atomic bombings of Hiroshima and Nagasaki occurred, before the war's end. Flights were successful, but showed a marked torque pull to starboard (due to the powerful engine), some flutter of the propeller blades, and vibration in the extended drive shaft.
Surviving aircraft
The two prototypes were the only examples of the Shinden ever completed. After the end of the war, one was scrapped; the other was claimed by a U.S. Navy Technical Air Intelligence Unit in late 1945, dismantled, and shipped to the United States. (Some sources claim that the USN took the first built while others state that it was the second.)
The sole surviving J7W1 was reassembled, but has never been flown in the United States; the USN transferred it to the Smithsonian Institution in 1960. Its forward fuselage is currently on display at the Steven F. Udvar-Hazy Center annex (at Dulles Airport) of the National Air and Space Museum in Washington DC. According to the NASM, 'miscellaneous parts' are stored at Building 7C at the older storage/annex facility, the Garber Facility in Suitland, Maryland.
Specifications (J7W1)
Data from Japanese Aircraft of the Pacific War
General characteristics
Crew: 1
Length: 9.66 m (31 ft 8 in)
Wingspan: 11.114 m (36 ft 6 in)
Height: 3.92 m (12 ft 10 in)
Wing area: 20.5 m2 (221 sq ft)
Empty weight: 3,645 kg (8,036 lb)
Gross weight: 4,928 kg (10,864 lb)
Max takeoff weight: 5,228 kg (11,526 lb)
Powerplant: 1 × Mitsubishi Ha-43 Model 12 (unified) (MK9D - IJNAS) 18-cylinder air-cooled radial piston engine, 1,590 kW (2,130 hp) for take-off[14]
2,020 hp (1,510 kW) at 1,180 m (3,870 ft)
1,160 hp (870 kW) at 8,700 m (28,500 ft)
J7W2 engine: 1x Ishikawajima Ne-130 8.83 kN (1,984 lbf) turbojet engine
Propellers: 6-bladed metal constant-speed pusher propeller
Performance
Maximum speed: 750 km/h (470 mph, 400 kn) at 8,700 m (28,500 ft)
Cruise speed: 422 km/h (262 mph, 228 kn) at 4,000 m (13,000 ft)
Range: 852 km (529 mi, 460 nmi)
Service ceiling: 12,000 m (39,000 ft)
Time to altitude: 8,000 m (26,000 ft) in 10 minutes 40 seconds
Wing loading: 240.4 kg/m2 (49.2 lb/sq ft)
Power/mass: 3.1 kg/kW (5.1 lb/hp)
Armament
Guns: 4× 30 mm (1.181 in) Type 5 cannon with 60 rpg
Bombs: 4× 30 kg (66 lb) or 4× 60 kg (130 lb) bombs
De Japanse Wikipedia kan ons via Google Translate iets meer leren over de jet-versie:
Citaat:
Jet
Details
There is a theory that Shinden had a concept of jetting in the future as "Shinden Kai " (abbreviation J7W2). The groundwork for this concept of jetting the Shinden is based on Kunitake Kiyohara, former deputy director of the Kyushu Aircraft Design Department, 1st Design Division, who contributed to an aerial magazine.
Kiyohara contributed, "On June 5, 1944, at the Aircraft Factory, at the" Prototype "Shinden" Planning Requirement Study Group "or at a later instruction, a member of the Aircraft Factory engineer said" Use of gas turbines. Please proceed with the design in consideration of this. " Attached to the Shinden will have a ground static thrust of 900 kg, equivalent to almost 3,000 HP, and a speed of about 420 kt (780 km / h). However, a take-off rocket was required, but this meant overloading. It seems that it was a Ne-130 jet engine being prototyped at Ishikawajima Shibaura Turbine. I thought that the era of the Tomoe war was finally over. In terms of Shinden's engine layout, retrofitting with a jet engine did not seem too difficult. I remember feeling excited about what we wanted to do soon. In the end, this did not happen, but the twin-engined jet attack aircraft " Tachibana " designed by Nakajima Airplane was also prototyped on Kyushu Airplane, and the war ended when the first aircraft was almost completed.
However, no other specific records of the Shinden have been designed in consideration of jetting. Mitsuo Nishimura, chief of Shinden's power outfitting group, also acknowledged that there was talk of jetting, but also testified that "it had not progressed at all specifically" for realization. . The development of the prototype jet engine NE130, which was scheduled to be installed at that time, was in the stage of full testing just before the end of the war, and it was not in a state where it could be actually used.
The cause is that its predecessor, Ne 20, has various fatal defects , and as a result of this defect, it has a very short durability life of only 15 hours at full design operation. However, even during the test flight of Tachibana, which was being developed in parallel with Shinden at that time, the flaw was revealed, and it was said that no solution had been taken. This defect occurred not only in the Ne20 but also in the Ne130 under development, and of course, it was not in a condition that could be mounted on the Shinden.
Furthermore, rare metals (nickel, chromium, etc.) for making heat-resistant metals essential for jet engines are almost depleted in Japan at the end of the war. The development of highly alternative metals has become one of the major barriers. Therefore, even if the prototype engine was completed, mass production would have been almost impossible.
Voor deze duo-bouw ga ik de moderne kit van Hasegawa voor de J7W1 gebruiken, en een zeer fraaie resin kit van Marsh Models voor de jet-aangedreven versie.
De Hasegawa kit:
Verzonken paneellijnen, goed detail, en voor zover ik kan zien makkelijke bouw.
De Marsh Models kit:
Instructies met kleurenfoto's aan de ene kant, en een exploded view aan de andere kant:
Decals:
White metal onderdelen en een gedraaid aluminium ring voor de uitlaat van de jet:
Twee cockpitkappen en drie photo-etched raampjes:
En een hoop hoge kwaliteit resin onderdelen met ietwat groffe paneellijnen maar excellente passing: