Gloster A.S.31 Survey

The Gloster A.S.31 Survey was a British photo-survey biplane of the late 1920s, developed from the de Havilland DH.67 design project that de Havilland transferred to Gloster in 1928. It was a twin-engined biplane with two 525 horsepower Bristol Jupiter XI engines on the lower wings, an open cockpit for two pilots and an enclosed cabin for a camera operator, with a glazed floor for three survey cameras, and it could keep flying on one engine. The prototype first flew in June 1929 and went to the Aircraft Operating Company, which flew it on a 7,000-mile survey of Northern Rhodesia in 1930. It was later sold to the South African Air Force, and a second example went to the Royal Aircraft Establishment.