Talk:Mitsubishi Kinsei

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Origin of Mitsubishi Kinsei engine[edit]

Mitsubishi Kinsei engine DID NOT developed from P&W R-1689 Hornet just because Hornet was single raw 9-cylinder engine but A8 Mitsubishi Kinsei was 14-cylinder 2-raw engine from the very beginning. It has bore/stroke size absolutely different from P&W R-1689 Hornet. So its origin from P&W R-1689 Hornet is false!!!

Mitsubishi's only two-row radial licenses were for Armstrong-Siddeley engines, the largest being the Leopard of 1932. This lineage is very apparent, right up to the late model Kinsei and Kasei variants, and even the 18-cylinder Ha-104.

So true Kinsei origin was Armstrong-Siddeley design & Tiger engine is the most close relative. It had bore 139.7 mm (Kinsei - 140 mm), stroke 152,4 mm (Kinsei - 150 mm). It is apparent that these two engines are almost identical.

See also a short timelist of Mitsubishi engines development http://www.mhi.co.jp/aero/introduction/contents/history_e.html --Aurum (talk) 08:53, 24 June 2011 (UTC)

Engines based on Mitsubishi A8 Kinsei design[edit]

Besides the development of the Kinsei engine itself, Mitsubishi started design of its more spacious successor. Firstly it was A6 Shinten (Navy) Ha-6(Army) engine. It had bore 140 mm, stroke 170 mm. And further the A6 Shinten engine was redisigned into A10 Kasei that had 150 mm bore & 170 mm stroke.

That was the history of Mitsubishi engines development --Aurum (talk) 08:51, 24 June 2011 (UTC)