Boeing XF8B
First flying on 27 November 1944, the Boeing XF8B was capable of acting as an interceptor, long-range escort fighter, dive-bomber, and torpedo bomber. Armament was to consist of six 0.50 inch machine guns or six 20 mm wing-mounted cannons, and a 6,400 lb (2,900 kg) bomb load or two 2,000 lb (900 kg) torpedoes.
Three prototypes were built, the first two being evaluated by the US Navy and the third by the USAAF. The end of World War Two and the advent of the jet engine resulted in the project being cancelled.