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Pratt
& Whitney J57 (JT3)

The
Engine 

Specifications 



The
J57 was the world's first jet engine to develop 10,000 lbs
thrust. It evolved from the T45 turboprop engine designed for the
XB52 program. The J57 featured a dualrotor axialflow compressor
which allowed low fuel consumption over a wide operating range and
improved the sluggish acceleration previously characteristic of jet
engines.
The civil version, the JT3 made possible
the Boeing 707 and Douglas DC8.
Production began in 1953 and lasted to 1970 (per U.S. Air Force
Museum. Pratt & Whitney gives the production dates as 1951 
1965). Over 21,000 were produced.


 Turbojet 
 Dualrotor axialflow compressor 
 mass flow: 164187 lbs/sec 
 pressure ratio: 12.5 






Models 

Used
by 



 YJ57P3: 8,700 lb (38.7 kN) thrust 
 J57P8B: 14,500 lb (64.5 kN) thrust w/afterburner 
 J57P10: 10,500 lb (46.7 kN) thrust 
 J57P19W: 12,100 lb (53.8 kN) thrust with water injection 
 J57P20A: 18,000 lb (80.1 kN) thrust 
 J57P21A: 17,000 lb (75.6 kN) thrust 
 J57P23: 17,200 lb (76.5 kN) thrust 
 J57P55: 16,900 lb (75.2 kN) thrust with afterburner 






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page updated 19 July 2003


