Rolls-Royce Dart Rolls-Royce Dart The Rolls-Royce RB.53 Dart is a long-lived British turboprop engine designed, built and manufactured by Rolls-Royce Limited. First run in 1946, it powered the first Vickers Viscount maiden flight in 1948, and in the Viscount was the first turboprop engine to enter airline service, with British European Airways (BEA), in 1950. On 29 July 1948 a flight between Northolt and Paris–Le Bourget Airport with 14 paying passengers in a Dart-powered Viscount was the first scheduled airline flight by any turbine-powered aircraft. The Dart was still in production when the last Fokker F27 Friendships and Hawker Siddeley HS 748s
Vickers V-1000 version with much greater bypass ratio. Vickers V-1000 The Vickers-Armstrongs V-1000 was an intended jet-powered cargo aircraft that was designed to meet a requirement issued by the British Ministry of Supply which sought a strategic transport for the Royal Air Force (RAF) to support its strategic bomber fleet, particularly the V-bombers. The design bears many similarities to the Vickers Valiant, one of the V-bombers, but also featured substantial changes. In addition to its military application, both the Ministry and Vickers also intended to use the same basic design as the VC7, a six-abreast trans-Atlantic jet airliner for British Overseas Airways