Pratt & Whitney J57


The Pratt & Whitney J57 is an axial-flow turbojet engine developed by Pratt & Whitney in the early 1950s. The J57 was the first 10,000 lbf thrust class engine in the United States. The J57/JT3C was developed into the J75/JT4A turbojet, JT3D/TF33 turbofan, and PT5/T57 turboprop.

Design and development

The J57 was a development of the Pratt & Whitney XT45 turboprop engine that was originally intended for the Boeing XB-52. As the B-52 power requirements grew, the design evolved into a turbojet, the JT3.
The J57 used titanium alloys and the Ti-150 alloy used in the mid 1950s suffered hydrogen embrittlement until the problem was understood.
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".
On May 25, 1953, a J57-powered YF-100A exceeded Mach 1 on its first flight. The engine was produced from 1951 to 1965 with a total of 21,170 built.

Variants

Data from:Aircraft Engines of the World 1964/65, Aircraft engines of the World 1957
;J57-P-1W: s.t with water injection
;J57-P-1WA:As P-1W
;J57-P-1WB:As P-1W
;J57-P-2:
;YJ57-P-3: thrust, used in the Convair YB-60
;J57-P-4A: thrust
;J57-P-5:
;J57-P-6: thrust
;J57-P-6B: thrust
;J57-P-7: thrust
;J57-P-8:
;J57-P-8A: thrust
;J57-P-8B: thrust
;J57-P-9:
;J57-P-9W: thrust
;J57-P-10: thrust
;J57-P-11: thrust, thrust
;J57-P-12:
;J57-P-13: thrust
;J57-P-15:
;J57-P-16: thrust
;J57-P-19W: thrust with water injection
;J57-P-20: thrust
;J57-P-20A: thrust
;J57-P-21: thrust
;J57-P-23: thrust
;J57-P-25: thrust
;J57-P-27:
;J57-P-29W: thrust with water injection
;J57-P-31:
;J57-P-37A:
;J57-P-39:
;J57-P-41:
;J57-P-43W: thrust
;J57-P-43WA: thrust
;J57-P-43WB: thrust
;J57-P-59W: thrust
;J57-F-13:Production by Ford
;J57-F-19W:Production by Ford
;J57-F-21:Production by Ford
;J57-F-23:Production by Ford
;J57-F-29W:Production by Ford
;J57-F-31W:Production by Ford
;J57-F-35:Production by Ford
;J57-F-43:Production by Ford
;J57-F-43W:Production by Ford
;J57-P-53:
;J57-P-55:
;J57-F-59W:Production by Ford
;JT3C-2: Civilian derivative of the J57-P-43WB, thrust
;JT3C-4:
;JT3C-5:
;JT3C-6: thrust
;JT3C-7: thrust
;JT3C-12: thrust
;JT3C-26: Civilian derivative of the J57-P-20, thrust

Derivatives

;J57
;JT3C

Specifications (JT3C-7)