NO! read the text : The Mitsubishi Shusui (Sword Stroke) was a design for a joint Army-Navy project for a fast-climbing interceptor fighter, prompted by the appearance over Japan of the American B-19 Superfortress bomber. The Navy version was designated the J8M1, and the Army version was designated the Ki-200. The project was based on the German Me-163b rocket-powered fighter, but unfortunately for the Japanese the submarine carrying the technical plans and the sample engine was sunk by the Allies enroute to Japan. Based on the incomplete data that arrived on a second submarine Mitsubishi took on the project in 1944 and had a mock-up ready by September of that year. A glider version for testing purposes was designated the MXY8 Akigusa (Autumn Grass), with three being built. After the testing and training program was undertaken the rocket-powered J8M1 was developed and was ready to start flight trials on July 7, 1945. On its maiden flight, however, the J8M1 crashed when the engine failed during the steep takeoff climb. Modifications were being made to the fuel system of the sixth and seventh prototypes, but the war ended before they could be tested or used
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