Tokyo Single Seat Assault Aircraft Project,1945

[hesham]

Hi,

Prototype single-seat assault aircraft
The prototype single-seat surprise attack aircraft (Shisakutanzaki Shuki) is
an attack aircraft jointly planned by the Imperial Japanese Army and the
Imperial Japanese Navy. There is no plan number or abbreviated code
because it is a site planning machine.

overview
In April 1945, Singaporean army and navy officials announced the
"Southern Self-Support Plan," a local production plan for a special attack
aircraft using a spare 1,000-horsepower-class air-cooled
engine and propeller, which had been used for about 250 aircraft. Planned
by The design was carried out from the beginning of May 1945, led by Shinroku Inoue, an engineer of the Tokyo Air Service, who was dispatched to the 3rd Air Force Headquarters as an Army administrator. cooperated with it. Production
of the aircraft began in June 1945, but development halted at the end of
World War II, and several sets of fuselages and wings that had been assembled
at the end of the war were scrapped.

The fuselage is made of wood, except for the fuselage framework that uses
steel pipes. Locally procured engines were used, and various equipment such
as fixed legs were used from the damaged aircraft. It was also designed for dive bombing at a descent angle of 60 degrees.

Specifications
Total length: 8.35m
Width: 11.35 m
Main wing area: 20.0 m2
Weight: 2,500 kg
Takeoff weight: 3,000 kg
Engine: Locally procured air-cooled (1,000 hp class) x 1
Armament: 250kg bomb x 1
Crew: 1 person

https://profilbaru-com.translate.goog/ja/試作単座奇襲機?_x_tr_sl=ja&_x_tr_tl=en&_x_tr_hl=en

 

[Hafidz Rahman]

Hi, just found some information on Twitter.

Based from that information too, that aircraft was made by modifying Ki-107 trainer aircraft.

The full translate was like this:

"Shinroku Inoue, an engineer of Tokyo Airlines who worked on the Ki-107, was appointed as the chief designer and appointed to the 3rd Air Force Headquarters as an army administrator. Originally, the design prototype was started

Two and a half months later, the assembly of the wings and fuselage began, but unfortunately it was not completed due to the end of the war. A 250 kg bomb drop device was installed on the underside of the fuselage, and a 60-degree dive bombing was possible."

Source:

https://twitter.com/x/status/1315645181878628355

View: https://twitter.com/farman12we18wdt/status/1315645181878628355

 

[airman]

Hi,

Prototype single-seat assault aircraft
The prototype single-seat surprise attack aircraft (Shisakutanzaki Shuki) is
an attack aircraft jointly planned by the Imperial Japanese Army and the
Imperial Japanese Navy. There is no plan number or abbreviated code
because it is a site planning machine.

overview
In April 1945, Singaporean army and navy officials announced the
"Southern Self-Support Plan," a local production plan for a special attack
aircraft using a spare 1,000-horsepower-class air-cooled
engine and propeller, which had been used for about 250 aircraft. Planned
by The design was carried out from the beginning of May 1945, led by Shinroku Inoue, an engineer of the Tokyo Air Service, who was dispatched to the 3rd Air Force Headquarters as an Army administrator. cooperated with it. Production
of the aircraft began in June 1945, but development halted at the end of
World War II, and several sets of fuselages and wings that had been assembled
at the end of the war were scrapped.

The fuselage is made of wood, except for the fuselage framework that uses
steel pipes. Locally procured engines were used, and various equipment such
as fixed legs were used from the damaged aircraft. It was also designed for dive bombing at a descent angle of 60 degrees.

Specifications
Total length: 8.35m
Width: 11.35 m
Main wing area: 20.0 m2
Weight: 2,500 kg
Takeoff weight: 3,000 kg
Engine: Locally procured air-cooled (1,000 hp class) x 1
Armament: 250kg bomb x 1
Crew: 1 person

https://profilbaru-com.translate.goog/ja/試作単座奇襲機?_x_tr_sl=ja&_x_tr_tl=en&_x_tr_hl=en

Any official designations or a special version of Ki 107 for special attack ?

 

[Apophenia]

... that aircraft was made by modifying Ki-107 trainer aircraft...

I don't believe that was what was being implied in those Tweets. Shinroku Inoue had some experience with the Ki-107 at Tōkyō Kōkū K.K. (and probably the Tachikawa Ki.9 before that). But the Ki-107 was a tiny, lightweight wooden trainer powered by a 110 hp 4-cylinder. No such an airframe could be successfully 'tweaked' to take engine almost 10 times more powerful.

Rather than "modifying" the Ki-107, I would suggest 'influenced' is the word. I have seen the claim: "The wings and tail refer to the Tokyo Airlines [sic] Ki-107 trainer." In other words, Shinroku Inoue referenced his knowledge of the Ki-107's wooden wings and tail to create much beefier structures for this Singapore 'special attack' aircraft.

I'm not sure that I would completely trust the source above. (For example, there are some dodgy bits about a supposed 'twin-engined Tachikawa Ki-91'.) With that acknowledged though, I was interested to see: "The aircraft adopts a steel tube frame and wooden structure." If accurate, that confirms hesham's quote about a steel-tube fuselage structure.

 

[Apophenia]

... or a special version of Ki 107 for special attack ?

Not that I'm aware of but it would have been technically feasible. The Kokusai-built development of the Ta-Gō 'special attack' aircraft was powered by the same 110 hp Hitachi Ha.47 II engine used in the Ki-107.