Talk:Mitsubishi K7M

Engine

Evening Milborne. According to Bill Gunston's book (2nd ed) the Kawasaki Ha-9 was a watercooled V-12 in the 710-950 hp range. For what it's worth, http://www.hikotai.net/datasheets/k7m.htm has the K7M with 2 x 340hp Gasuden GK2 Tempu II radials. Cheers, TSRL (talk) 17:16, 28 January 2010 (UTC)

Some sites give the alternative name Hitachi Ha-22-11 to this engine.TSRL (talk) 17:22, 28 January 2010 (UTC) Gunstone mentions Hitachi radials and the Tempu 9 cylinder radial though not, explicitly, the Ha-22.TSRL (talk) 17:27, 28 January 2010 (UTC)

If we could find an image it would help as the sources dont seem to agree! I wonder if the prototypes had a different engine than intended for the production machines that were not built! Although that may not explain the mix up of V-12 and radial. MilborneOne (talk) 18:45, 28 January 2010 (UTC)

Image here http://www.samoloty.ow.pl/str068.htmTSRL (talk) 19:05, 28 January 2010 (UTC) Kawasaki Ha-9 has no article but points to several users, which describe it as a developed DB engine and as water cooled.TSRL (talk) 19:08, 28 January 2010 (UTC)

The Kawasaki Ha-9 was a license-built BMW IX (with a Kawasaki-redesigned supercharger), not DB. Later Kawasaki engines (Ha-40, Ha-140) were licensed copies of the DB601.

The Tempu was the Ha-13 or (after mid-1943) Ha[23], not Ha[22]. However, Ha-13 is an IJAAF designation and would not have been used in this case, as the K7M was an IJNAF aircraft. Gasuden's aero-engine division was merged with Hitachi's in 1938 (iirc), and the Gasuden Tempu became the Hitachi Amakaze (Tempu and Amakaze are Chinese-style and Japanese-style pronunciations respectively of the same name, spelt with the same Kanji.) The non-aero engine part of Gasuden became Hino, for which there is a Wikipedia entry that mentions Gasuden, but I don't know how to link that up, sorry. —Preceding unsigned comment added by 202.49.0.2 (talk) 04:00, 29 July 2010 (UTC)