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Pratt & Whitney PT5 : ウィキペディア英語版
Pratt & Whitney J57

The Pratt & Whitney J57 (company designation: JT3C) was an axial-flow turbojet engine developed by Pratt & Whitney in the early 1950s. The J57 was the first 10,000 lbf (45 kN) thrust class engine in the United States. The J57/JT3C was developed into the J75/JT4A turbojet, JT3D/TF33 turbofan and the PT5/T57 turboprop.〔Gunston, p.167〕
==Design and development==

The J57 was a development of the XT45 (PT4) turboprop engine intended for the XB-52. As the B-52 power requirements grew, the design evolved into a turbojet, the JT3. The prestigious Collier Trophy for 1952 was awarded to Leonard S. Hobbs, Chief Engineer of United Aircraft Corporation, for "designing and producing the P&W J57 turbojet engine".〔(List of Collier Trophy Winners )〕 On May 25, 1953, a J57-powered YF-100A exceeded Mach 1 on its maiden flight. The engine was produced from 1951 to 1965 with a total of 21,170 built.
One XT57 was installed in the nose of a JC-124C (BuNo 52-1069), and tested in 1956.〔Francillon, René J. ''McDonnell Douglas aircraft since 1920'' (Putnam, 1979), p.470.〕〔Connors, p.294〕

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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