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Yokosuka P1Y
The Yokosuka P1Y ''Ginga'' (銀河, "Galaxy") was a twin-engine, land-based bomber developed for the Japanese Imperial Navy in World War II. It was the successor to the Mitsubishi G4M and given the Allied reporting name "Frances".
==Design and development==
The P1Y was designed by the Yokosuka Naval Air Technical Arsenal to Navy specification 15-''Shi'', calling for a fast bomber with speed matching the Zero, range matching the G4M, a 907 kg (2,000 lb) bombload, and the ability to dive-bomb as well as carry torpedoes. As the result, the construction suffered from excess complexity, difficulty of manufacture, and poor serviceability. Problems with the availability of enough reliable Nakajima ''Homare'' engines led to their replacement by the Mitsubishi ''Kasei'' in the P1Y2-S night-fighter version.
The streamlined design of the ''Ginga'' is attributed to Miki Tadanao, an engineer who, after World War II, went on to create a similar aerodynamic design for Japan's earliest `bullet trains` (Shinkansen), while working with the Japan National Railways (JNR).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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