Mitsubishi 3MT5

The Mitsubishi 3MT5 was a twin-engined biplane bomber of the 1930s, ordered by the Imperial Japanese Navy Air Service in January 1930 as a large carrier-based torpedo bomber. A team under the British engineer G. E. Petty designed it, and the Navy called it the 7-shi Twin-engine Carrier Aircraft. Eleven prototypes were built, the first flying on 19 October 1932, powered by two Mitsubishi A4 radial engines. It proved hard to control and suffered severe vibration, once tearing all four ailerons off a prototype in March 1934. It was judged unfit for carrier use and used instead as a land-based trainer, and no production followed. It is sometimes confused with the later monoplane G1M.