Hawker Siddeley Trident 1978, 117 Tridents had been produced. BEA's successor British Airways withdrew its Tridents by the mid-1980s. Trident services ended in China in the early 1990s. In 1953, as British European Airways (BEA) introduced the world's first turboprop-powered civil airliner – the Vickers Viscount – into passenger service, the operator was already considering what would be required of a potential successor. Following the entry into service of jet airliners in 1952, many airline managers and economists remained sceptical and advocated turboprop airliners as replacements of piston-engined airliners. In 1953, while several manufacturers across the world were investing in pure jet-powered aircraft,
Vickers Vampire Corps in February 1918. Service evaluation was unfavorable: although performance was satisfactory, its handling qualities were poor. A third aircraft, B1485, powered by a 230 hp (170 kW) Bentley rotary engine and modified for ground-attack was built in 1918 but by the time it was built the Sopwith Salamander had already been ordered for production and development was abandoned. Three further aircraft had been ordered and allocated service numbers but it is not known whether any of these were built. Vickers Vampire The Vickers F.B.26 Vampire was a British single-seat pusher biplane fighter built by Vickers during the First World