Turboprop on 20 September 1945. From their experience with the Trent, Rolls-Royce developed the Rolls-Royce Clyde, the first turboprop engine to be fully type certificated for military and civil use, and the Dart, which became one of the most reliable turboprop engines ever built. Dart production continued for more than fifty years. The Dart-powered Vickers Viscount was the first turboprop aircraft of any kind to go into production and sold in large numbers. It was also the first four-engined turboprop. Its first flight was on 16 July 1948. The world's first single engined turboprop aircraft was the Armstrong Siddeley Mamba-powered Boulton
Vickers Vulcan its fuselage, as well as its flying characteristics, earned it the nickname "Flying Pig". The first delivery took place in August 1922, to Instone Air Line Ltd. Other operators included Imperial Airways and Qantas (however, the latter returned the aircraft as their performance was too poor for the company's needs). The last Vulcan flying was a Type 74 with Imperial Airways. It crashed in July 1928. Vickers Vulcan The Vickers Vulcan was a British single-engine biplane airliner of the 1920s built by Vickers Limited at Brooklands Aerodrome, Surrey. It carried eight passengers and a pilot. The Vickers Vulcan was designed