Nakajima Ha[45]-41 NK9A Engine

[krieghund]

I was doing some research into the Ki-44-III and ran across these specs for the Ha[45]41 NK9A of the Shoki 3 fighter. There seems to be only about a half dozen Ki-44-III made but with this engine's power output it must have been hot. This engine is also referred to as the Homare 10. I am wondering with these numbers why is the Homare 11 of the N1K1-J and Ki-84 is so much less in performance and why the Homare 10 was not used. Of course I suspect these numbers are not accurate. Does anyone have any information on this engine or can shed some light on this.

 

[R Pope]

My info on the Homare 21 has it a 1940 cu. in. 18 cylinder radial with 1970 take-off HP. tapering off to 1000 HP at 22,000 feet. Sorry, no gen on the Homare 10.

 

[krieghund]

My info on the Homare 21 has it a 1940 cu. in. 18 cylinder radial with 1970 take-off HP. tapering off to 1000 HP at 22,000 feet. Sorry, no gen on the Homare 10.

Thanks go to here for Homare 21 info http://www.ww2aircraft.net/forum/engines/nakajama-ha-45-hamore-engine-32694-2.html

 

[Shinpachi]

Interesting thread, krieghund.
Where did you know Homare 10 for Ha-145?
As long as I know, the army Ha-145 was equivalent to the navy Homare 40s with 2-stage 3-speed supercharger.

Ha-45-41 was an integrated designation for Homare 41.

 

[krieghund]

A while back I got a spreadsheet from the Biglobe website of a guy who had all kinds of aerodynamic materials on it and one was engines of the Japanese navy army. His name was ながもり

His site has been down now for a few years. This is an excerpt of the Ha145 engine.

 

[Shinpachi]

Thank you very much for your kind information, krieghund.
Nagamori-san is unknown to me regretly.

BTW, the official integrated designation for the Ha-145 was Ha-45-43.
You may think it equivalent to Homare 43.

 

[krieghund]

Ok thanks. Any luck moving forward with the A6M8?