Hughes XF-11
The Hughes XF-11 was a twin-engined photographic reconnaissance prototype built by Hughes Aircraft Company for the United States Army Air Forces. Developed from the secretive D-2, it was designed for 400 mph at high altitude, but it was not completed until after the Second World War had ended. The first prototype crashed on its maiden flight in July 1946, critically injuring Howard Hughes; the second flew in 1947, was tested by the Air Force as the XR-11, and was scrapped in 1949. No example survives.