Mitsubishi K7M

The Mitsubishi K7M, also called the Ka-18, was an experimental crew trainer of the 1930s that Mitsubishi built for the Imperial Japanese Navy to replace the single-engined K3M. It was a cantilever high-wing monoplane of metal construction with fabric-covered outer wings, a cabin for five students and two instructors, and two Gasuden Tempu radial piston engines of 254 kilowatts each. The Navy decided that a twin-engined type was too costly to replace the K3M, so the design was not developed further. The two prototypes were nevertheless taken into service as trainers under the designation K7M1. It had an empty weight of 2,558 kilograms and a top speed of 260 kilometres per hour.