Avro 547

The Avro 547 was a prototype triplane airliner developed in Britain after the First World War. It utilised components from the highly successful 504 but added an extra set of wings and a new deep fuselage housing a fully enclosed cabin to seat four passengers. The aircraft was powered by a 160 hp (120 kW) Beardmore engine. The pilot sat in an open cockpit offset to port. The prototype flew well, having similar characteristics to a 504, the second example built was substantially modified, in order to compete in a British Air Ministry competition for a commercial aircraft, being fitted with a 240 hp (180 kW) Siddeley Puma engine. Designated 547A, this version turned out to be slow and unstable in the air and failed to win an award in the competition in August 1920. Damaged in a forced landing at the competition, the second prototype was scrapped in 1922.