Tachikawa Ki-70 "Clara" reconnaissance plane

[T-50]

I searching for info about the Tachikawa ki-70 reconaisance aircraft,I believe there was one prototype of this very clean and advanced
aircraft.
Ill hope there is more info about this 2 engined aircraftfor example photos and drawnings or other info,who can help me with this?
regards
T-50

 

[GTX]

http://www.aviastar.org/air/japan/tachikawa_ki-70.php

 

[Stargazer]

Tachikawa Ki-70 (Allied codename: "Clara"):

 

[blackkite]

Wow excellent images! I will check Japanese sources.

http://home1.tigers-net.com/~tj016341/index_1.html
http://www.airwar.ru/enc/spyww2/ki70.html

 

[blackkite]

Nohara Shigeru's ILLISTRATED WARPLANE HISTORY THE XPLANES OF IMPERIAL JAPANESE ARMY & NAVY include interesting Ki-70 wind shield drawing. What is this? This wind shield shape is same as attached picture. This picture seems to be a mockup picture.
Ki-70's wind shield shape is mystery. :-[ I think that existing Ki-70 3 side view's wind shield shape based on Tachikawa's desk top model is mistake.
Desk top model had a simplified wind shield or ideal wind shield?

 

[Stargazer]

Thanks for the pics, blackkite.

It's difficult to find good resources on the Ki-70.

What surprises me more is that a prototype is claimed to have been produced, and the Allies even gave it the name "Clara", so why is it impossible to find even one photo of the real article??

As for the "wind shield" I think it's a problem of translation. Some kind of armored panels I believe.

 

[blackkite]

Three Ki-70 were producted and tested, but the the test result was not satisfactory for the IJA. Maximum speed was 580km/h, where required maximum speed was 650km/h. There was a Ki-70Ⅱ plan with take off power 2200hp HA-211 engine or turbo charged HA-211 engine.(HA-211 lu engine).

 

[blackkite]

Hi! Matsuba's image. Amazing drawing. Too large to scan. ;D This drawing is a large folded drawing in the book.
I will add some explanation for each parts. Please wait.
Source : JAPANESE ARMY & NAVY EXPERIMENTAL AIRCRAFT, DESIGN WITH PRECISION[4] drawing by Matsuba Minoru
Thanks T-50 san. This topic is very interesting.

 

[theponja]

Hi! Matsuba's image. Amazing drawing. Too large to scan. ;D

Maybe in two parts?


Now we're talking. Thanks blackkite great scans!!!

 

[windswords]

The Ki-70 was supposed to replace the Ki-46 but was more difficult to handle and slower. It also had a 3 man crew to the Ki-46's 2 man.

 

[windswords]

One interesting feature was the remote controlled 12.7mm tail gun.

from 'The Xplanes of the Imperial Japanese Army and Navy 1924-1945':

 

[windswords]

Blackite-san,

Would you be able to translate any of the numbered features in the drawings you or I have posted?

 

[T-50]

Three Ki-70 were producted and tested, but the the test result was not satisfactory for the IJA. Maximum speed was 580km/h, where required maximum speed was 650km/h. There was a Ki-70Ⅱ plan with take off power 2200hp HA-211 engine or turbo charged HA-211 engine.(HA-211 lu engine).

Hi Blackkite san
Ididnt know that there were three prototypes of the Ki-70,and I also didnt know that the Tachikawa plant was developing an inproved version of the Ki-70 very interesting stuff I must say!

 

[T-50]

Hi! Matsuba's image. Amazing drawing. Too large to scan. ;D

wow great picture blackkite san!

 

[T-50]

I didnt know that there is so many info about this very rare type build by Tachikawa ,I want to thank everybody who was replying on my question for info about the Ki-70!
regards
T-50

 

[blackkite]

Hi!
Three side view in before page shows No.3 aircraft because span was extended to 17.8m because of excessive 1ton weight.
Excessive weight and larger wing were the reason why maximum speed lowered. The IJA's requirements were to hard to design.
I imagine that flying test result of No.1 and No.2 aircraft were very bad. Ki-70 was cancelled due to poor preformance in 1943.

 

[blackkite]

① 肩当て : shoulder pad​

② 握把 : grip​

③ 操作槓桿固定金具 : operating lever fix device​

④ 予備弾倉 : extra magazine​

⑤ 弾倉格納袋 : magazine rack​

⑥ 尾部砲照準環 : tail cannon sight​

⑦ 尾部砲操作槓桿 : tail cannon operating lever​

⑧ 引金 : trigger​

⑨ 操作器 : operating equipment​

⑩ 連動槓桿（上下用） : linkage lever(up and down direction)​

⑪ 連動槓桿（左右用） : linkage lever(right and left direction)​

⑫ 後席7.7mm機銃架 : aft seat 7.7mm gun frame​

⑬ 油圧槓桿信号灯 : hydraulic lever signal light​

⑭ 7.7mm機銃取付部 : 7.7mm gun attachment part​

⑮ 回転風防 : rotating wind shield​

⑯ 油圧槓桿切替レバー : hydraulic lever change lever​

⑰ 尾砲発射準備レバー : tail cannon fire preparation lever​

⑱ 尾砲電源開閉器 : tail cannon power supply switching station​

⑲ 銃手用足掛 : gunner foot bar​

 

[windswords]

Domo for the translation Blackkite. You're the best!

 

[T-50]

I agree!!!!

 

[blackkite]

Domo for the translation Blackkite. You're the best!

No no no.......windswords-san and T-50-san. But I'm very happy to know that you are my side. ;D

① 握把 : grip​

② 引鉄 : trigger

③ 操作槓桿 : operating lever​

④ 照準環 : gun sight

⑤ 連動槓桿（上下用）: linkage lever(up and down direction)​

⑥ 連動槓桿（左右用）: linkage lever(right and left direction)​

⑦ ホ一○三　一式12.7mm機関砲 : Ho103 type-1 12.7mm gun​

① ホ一○三　一式12.7mm機関砲 : Ho103 type-1 12.7mm gun​

② 革袋 : leather bag​

③ 保弾子排出口 : link ejection chute​

④ 俯仰用股状金具 : looking up and down metal fitting

⑤ 胴体尾端覆 : tail cover

⑥ 尾灯 : tail light

⑦ 銃架支軸 : gun frame support structure

⑧ 尾端覆着脱用ネジ : tail cover dismountable screw

⑨ 砲油圧槓桿給油管 : gun hydraulic lever oil supply tube

⑩ 砲発射電磁器 : gun discharge electromagnetic contactor

⑪ 油圧槓桿信号開閉器導線 : hydraulic lever signal switching station lead

⑫ 連動槓桿（上下用）: linkage lever(up and down direction)​

⑬ 連動槓桿（左右用）: linkage lever(right and left direction)​

⑭ 発射槓桿操作索 : discharge lever control cable

⑮ 砲防振装置 : gun vibration-proofing device

⑯ 砲後方取付金具 : gun back attachment lug

⑰ 砲防振装置軌条 : gun vibration-proofing device rail

⑱ 胴体第２８筐 : fuselage No.28 case

⑲ 可撓式給弾管 : flexible bullet supply tube

⑳ 砲前方取付金具 : gun front attachment lug

21 空薬莢排出口 : empty cartridge outlet

22 砲揺 : cannon cradle

23 駐退器 : recoil brake

24 弾帯引出口 : cartridge belt outlet

 

[blackkite]

① 大航空写真機 : large air camera​

② 偏流計 : drift meter​

③ 偵察士 : reconnaissance crew​

④ 無線機 : wireless radio ⑤ 操縦室主計器盤 : cockpit main instrument board ⑥ 着陸灯 : landing light ⑦ 操縦士 : pilot ⑧ ループアンテナ : loop antenna ⑨ 胴体燃料タンク : fuselage fuel tanks ⑩ 遠方羅針儀 : distant place compass ⑪ 照明弾 : flare

⑫ 垂下空中線絡車 : trailing antenna spinning wheel​

⑬ 酸素ボンベ : oxygen cylinder​

⑭ 機上蓄電池 : storage battery on a plane ⑮ 照明弾投下装置 : flare jettison gear ⑯ 銃手 : gunner ⑰ 九八式7.92mm機銃 : 98-shiki 7.92mm machine gun ⑱ 弾倉 : magazine ⑲ 配電盤 : switchboard

⑳ 遠隔操作一式12.7mm機関砲(ホ一○三) : remote control type-1 12.7mm gun(Ho-103)​

The feature of Ki-70 reconnaissance plane is that the cockpit and the reconnaissance member seat are very separated.
Since 670 km/h of maximum spped was required, Ki-70 reconnaissance plane adopted the thinnest possible laminar flow wing.
Therefore, the fuel which can be stored in wings will be restricted and fuel will be stored also in the body.
Loading of a flare was also required.
Therefore, it is the disadvantageous big long body on aerodynamics.​

It is a type of the negative design which fell spirally.
​