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The was a two-row, 14-cylinder air-cooled radial engine built by the Mitsubishi Aircraft Company for the Imperial Japanese Army Air Service (IJAAS) and the Imperial Japanese Navy Air Service (IJNAS) in the early 1930s. Like many aircraft engines in Japan, there were multiple designations for this engine. The company model designation was A6(7) while it was an experimental engine project. Once accepted, it was known as the "Shinten" or MK1 by the IJNAS, and Ha6 by the IJAAS.〔Francillon, René J. Japanese Aircraft of the Pacific War. p. 515〕 ==Design and development== The Mitsubishi Shinten was a development of the Mitsubishi Kinsei engine. The stroke of the Kinsei was increased from to on the Shinten model 11 and to on the Shinten model 21 and 21Kai designs. Lengthening the stroke increased the displacement from the Kinsei's to for the Shintin model 11. The increased displacement raised the horsepower from to at take-off power. Initially Ha-6 Shintens were to be installed on Mitsubishi Ki-21 bomber aircraft, but it was decided to use a competing engine, the Nakajima Ha-5 instead. Furthermore Mitsubishi was ordered to produce Nakajima's engine at its factory under license. So only 113 Shinten engines were made and they were installed on only few types of aircraft. In order to beat the rival and also to develop a more powerful engine for the new Navy Attack Bomber that became famous Mitsubishi G6M Betty, Mitsubishi Shinten was developed into the Mitsubishi Kasei by increasing the bore from to which in turn brought the displacement to and increased power to . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mitsubishi Shinten」の詳細全文を読む スポンサード リンク
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