Pratt & Whitney J57

Wednesday, September 22, 2010

The Pratt & Whitney J57 was an axial-flow turbojet engine designed by Leonard S. Hobbs in 1952 and manufactured by Pratt & Whitney to power the B-52 Stratofortress aircraft. The J57 was the first 10,000 lbf (45 kN) thrust class engine in the United States. The J57 company designation was JT3C. This turbojet engine also powered the F-100 Super Sabre and the F-102 Delta Dagger.

Specifications for the Pratt & Whitney J57

Type: Afterburning turbojet
Length: 244 in (6,200 mm)
Diameter: 39 in (1,000 mm)
Dry weight: 5,175 lb (2,347 kg)
Compressor: Two-spool 16-stage axial compressor
Maximum thrust: 11,700 lbf (52.0 kN) dry; 17,200 lbf (76.5 kN) with afterburner
Overall pressure ratio: 11.5:1
Turbine inlet temperature: 1,600 °F (870 °C)
Specific fuel consumption: 2.10 lb/(h·lbf) (214.2 kg/(h·kN)) with afterburner
Thrust-to-weight ratio: 3.32:1 (32.6 N/kg)


Source: Wikipedia