High Quality Content by WIKIPEDIA articles! Design work on the Ki-12 was a collaboration between engineers Roger Robert and Jean Beziaud from the French Dewoitine firm and Shigenobu Mori, a Nakajima engineer, and was heavily-influenced by the Dewoitine D.510 design. Nakajima wanted the new design to be the most technically advanced in Japan. Based on the Ki-11 airframe, the engine was replaced by a liquid-cooled 454 kW (610 hp) Hispano-Suiza 12Xcrs V engine. The landing gear were fully retractable (the first Japanese design to have this feature)[2], and the design introduced the use of slotted flaps. Proposed armament consisted of a 20 mm cannons firing from between the engine cylinders and twin 7.7 mm (.303 in) machine guns.

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