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Rolls-Royce RB108
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Rolls-Royce RB108 : ウィキペディア英語版
Rolls-Royce RB108

The Rolls-Royce RB.108 was a British jet engine designed in the mid-1950s by Rolls-Royce specifically for use as a VTOL lift engine, i.e., an engine intended primarily for providing upwards thrust rather than for horizontal propulsion.
==Design and development==
Of a squat and compact design for mounting vertically, the RB.108 differed from conventional turbojet engines in having its bearings and oil system designed for prolonged operation in the vertical attitude. First bench-tested in 1955 by Alan A. Griffith, who had conceived the idea of a specialised lift jet in 1941, thrust was 2,130 lbf (966.15 kg) from a weight of 269 lb (122 kg), giving a thrust/weight ratio of 8:1.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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