What was the Japanese name for the Ha-5/41/109 [Ha-34] Engine?
- Thread starter Kilkenny
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Hardrada55
Airman
I may be wrong, but I always thought it had to do with the different naming conventions of the IJA and the IJN. Please correct me if I am wrong, but early in WW2, did not the IJ Navy engines have names by which the engine was commonly known. Didn't the Army use their own Ha number and/or a formal designation. Later in WW2 the IJA and IJN developed an "integrated" unified numbering system. For example the Japanese Navy called the engine the Honor 11, The Japanese Army called the same engine the Ha45, or the Type 4 1850hp engine. The late unified (integrated) system referred to the engine as the Ha45-11. I don't remember when the unified numbering started. 1943?
- Thread starter
- #3
I think you are correct about this... However, I am looking for a name; not a number (which I already have)... Perhaps it is because the engine was not used by the IJN?
Hardrada55
Airman
I'm not aware of any IJN usage of this series of engines. It was used much by the Ki-49 Helen bomber and Ki-44 fighter
It was after the Ministry of Munitions was established on November 1, 1943.
I think that Nakajima failed sales promotion to IJN at the first step.
IJN was not interested in Nakajima's NAL-family engine Ha-5 because they thought such a new type engine like the double-row should be more powerful. At this point, Nakajima should have waited for the next chance in the future but carelessly attempted re-designing the Ha-5 for 1,450hp as NAL-6 with insufficient experiences. Result was, of course, failure and, to the worse, IJN never paid attention to the NAL again.
