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Rolls-Royce Pegasus : ウィキペディア英語版 | Rolls-Royce Pegasus
The Rolls-Royce Pegasus, formerly the Bristol Siddeley Pegasus, is a turbofan engine originally designed by Bristol Siddeley. It was manufactured by Rolls-Royce plc. The engine is not only able to power a jet aircraft forward, but also to direct thrust downwards via swivelling nozzles.〔Bolkcom, C. "(F-35 Joint Strike Fighter (JSF) Program: Background, Status, and Issues )" CRS Report for Congress. (2005). Accessed 14 October 2009.〕 Lightly loaded aircraft equipped with this engine can manoeuvre like a helicopter. In particular, they can perform vertical takeoffs and landings.〔"(Air Cadet Publication 33: Flight - Volume 3 Propulsion )" (282 East Ham Squadron - Air Training Corps ). (2000). Accessed 14 October 2009.〕 In US service, the engine is designated F402. The unique Pegasus engine powers all versions of the Harrier family of multi-role military aircraft. Rolls-Royce licensed Pratt & Whitney to build the Pegasus for US built versions. However Pratt & Whitney never completed any engines, with all new build being manufactured by Rolls-Royce in Bristol, England. The Pegasus was also the planned engine for a number of aircraft projects, among which were the prototypes of the German Dornier Do 31 VSTOL military transport project.〔(''Flight'' 23 April 1964 p. 668 )〕 ==Development==
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