| J57 / JT3C | |
|---|---|
| YJ57-P-3 cut-away demonstrator at USAF Museum | |
| Type | Turbojet |
| National origin | United States |
| Manufacturer | Pratt & Whitney |
| First run | 1952 |
| Major applications | B-52 Stratofortress B-57 Canberra Boeing 707 Douglas DC-8 F-8 Crusader F-100 Super Sabre |
| Number built | 21,170 built |
| Developed from | Pratt & Whitney XT45 |
| Variants | Pratt & Whitney JT3D/TF33 |
| Developed into | Pratt & Whitney J52/JT8A Pratt & Whitney J75/JT4A |
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 J75/JT4A turbojet, and the JT3D/TF33 turbofan.[1]
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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".[2] 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 C-124 (BuNo 52-1069), and tested in 1956.[3][4]
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