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-Armstrongs company produced the Wellesley, designed by Rex Pierson using the geodetic airframe principle of structural engineer Barnes Wallis. This would later evolve into the famous Wellington bomber, a mainstay of RAF Bomber Command and RAF Coastal Command during World War II. The Cold War-era Valiant V bomber was another Vickers product. Military aircraft with the Vickers brand: Vickers also competed for contracts with designs such as: Vickers was a pioneer in producing airliners, early examples being converted from Vimy bombers. Post-WWII, Vickers went on to manufacture the piston-engined Vickers VC.1 Viking airliner, the Viscount and Vanguard turboprop airliners and (as