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Author Topic: Kawasaki Ki-91 long range heavy bomber  (Read 25293 times)

Offline blackkite

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Re: Kawasaki Ki-91 long range heavy bomber
« Reply #60 on: September 12, 2015, 05:21:36 am »
I hope that Ki-91 full scale mockup pictures are still survive somewhere in Japan now and we will see these pictures near future. ;)

http://alternathistory.org.ua/proekt-tyazhelogo-bombardirovshchika-91-kawasaki-ki-91-yaponiya
« Last Edit: September 12, 2015, 04:11:00 pm by blackkite »

Offline CherryBlossom

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Re: Kawasaki Ki-91 long range heavy bomber
« Reply #61 on: September 13, 2015, 03:48:06 pm »
No not really. Just that I've never seen a picture of a prototype or even a partial construction. According to Ed Dyer's book Japanese Secret Projects a wood mockup was made and inspected by the JAAF in May 1944. The book also says that construction of a prototype was began but the factory was bombed by the Americans in February 1945 which severely damaged the project. With the war situation worsening the project was abandoned to concentrate on fighters.

I have the book as well, its a dam shame about it.

It reminds me of the Ki-98 and Ki-119, I just wish to see some photos of them!

But otherwise i have another question; The Ki-91 was supposed to have 12 x 20 mm cannons according to various sources. However, In artist impressions and the drawings, you find it difficult to see where the remaining two go. I think if i recall correctly, the far-rear turret housed 4, but again i cannot see them on the impressions/drawings. Do you know why this is?
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Offline blackkite

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Re: Kawasaki Ki-91 long range heavy bomber
« Reply #62 on: September 13, 2015, 05:08:34 pm »
Hi!
I think 20mm cannon were 10.
Some Japanese source says that each fuselage side had a 20mm cannon.
But I can't confirm it.

http://military.sakura.ne.jp/ac/ki91.htm

武装(armament) 20ミリ機関砲(20mm cannon)12(連装銃座(coaxial machine cannon)(機首(nose)、前方下部(front under)、上部(upper)、後方下部(aft direction under)、尾部(tail))5、
胴体側面左右各1(fuselage left and right side had one cannon each))、爆弾(bomb)4,000kg~8,000kg搭載
« Last Edit: September 13, 2015, 11:26:56 pm by blackkite »

Offline Winston

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Re: Kawasaki Ki-91 long range heavy bomber
« Reply #63 on: September 14, 2015, 09:02:52 am »
http://military.sakura.ne.jp/ac/ki91.htm

武装(armament) 20ミリ機関砲(20mm cannon)12(連装銃座(coaxial machine cannon)(機首(nose)、前方下部(front under)、上部(upper)、後方下部(aft direction under)、尾部(tail))5、
胴体側面左右各1(fuselage left and right side had one cannon each))、爆弾(bomb)4,000kg~8,000kg搭載
In "The Xplanes of Imperial Japanese Army & Navy 1924-45" the armament is listed as 20mm x12 but in the drawing there are only x10.  :-\

Offline JFC Fuller

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Re: Kawasaki Ki-91 long range heavy bomber
« Reply #64 on: September 14, 2015, 09:46:59 am »
Ha214s as engines? With turbochargers?

Offline blackkite

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Re: Kawasaki Ki-91 long range heavy bomber
« Reply #65 on: September 14, 2015, 01:39:30 pm »
Hi!
The engine was Mitsubishi Ha214 ru(HA42-21 ru or MK10 or A18) with turbo charger.
This engine has 4 kinds of name in the thing which should be marvellous. Crazy! ;D
Take off power was 2,500hp each.
RU means turbo charged engine.
Ha214's base was the Kasei 14 cylinders air cooling engine.
Ha214 was a 18 cylinders air cooling engine.
Ki-91 engine nacelle shape is very clean same as Mitsubishi Hiryu's engine nacelle.
We can't see ram air intake for engine and air intake for oil cooler.
Perhaps Ha214-ru engine had a forced cooling fan.
Perhaps Ki-91's engine was same as Mitsubishi 4-shiki heavy bomber Hiryu Ki-67-Ⅱ's engine.

Of course A18 engine had many delivatives for example, A18A,B,C,D,E.
(1) Single stage two speed mechanical supercharger type ; A18A?
(2) First stage turbo charger+second stage two speed mechanical supercharger type ; A18B?(Ha214 ru?)
(3) Single stage three speed mechanical supercharger type ; A18C?
(4) Vulkan coupling drive first stage supercharger+second stage two speed mechanical super charger type(for pusher) ; A18D?
(5) Vulkan coupling drive first stage supercharger+second stage two speed mechanical super charger type(for tractor) ; A18E?

« Last Edit: September 15, 2015, 12:52:02 am by blackkite »

Offline blackkite

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Re: Kawasaki Ki-91 long range heavy bomber
« Reply #66 on: December 28, 2017, 01:41:16 am »
Hi! Larger images.
There is no window for sight in the rear turret under the fuselage. ???
I can see some turret shape in existing images.

https://forum.warthunder.com/index.php?/topic/337549-kawasaki-ki-91-%E3%82%AD-91/
« Last Edit: December 28, 2017, 01:58:03 am by blackkite »