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The General Electric YJ93 turbojet engine was designed as the powerplant for both the North American XB-70 Valkyrie bomber and the North American XF-108 Rapier interceptor. The YJ93 was a single-shaft axial-flow turbojet with a variable-stator compressor and a fully variable convergent/divergent exhaust nozzle. The maximum sea-level thrust was .〔 ==Design and development== The YJ93 started life as the General Electric X275, an enlarged version of the General Electric J79 turbojet. This evolved to the X279 when Mach 3 cruise became a requirement, and ultimately became the YJ93.〔Jenkins, Dennis R. and Tony R. Landis. ''Valkyrie: North American's Mach 3 Superbomber''. North Branch, Minnesota: Specialty Press, 2005. ISBN 1-58007-072-8. 〕 The engine used a special high-temperature JP-6 fuel. The six YJ93 engines in the XB-70 Valkyrie were capable of producing a thrust to weight ratio of 5, allowing for a speed of (approximately Mach 3) at an altitude of .〔(National Museum of the USAF )〕 The XF-108 interceptor was cancelled outright and the B-70 project was reoriented to a research project only.〔(NB-58A Testbed for General Electric J93 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「General Electric YJ93」の詳細全文を読む スポンサード リンク
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