Monday, October 4, 2010

Pratt & Whitney PW2000

The Pratt & Whitney PW2000 is an axial-flow turbofan engine developed by Pratt & Whitney to power the Boeing 757. Also known as the F117 by the military, the PW2000 had a thrust range between 37,000 and 43,000 lbf. This turbofan engine was fitted with a directed-flow thrust reverser capable of being deployed in flight. On the ground, the thrust reverser can reverse a fully-loaded aircraft up a two-degree slope.

The PW2000 was a two-spool, annular combustion, electronically-controlled turbine engine, which was the first designed to certify a Full Authority Digital Engine Control (FADEC) system available for civil aviation use. The PW2000 has been built in three variants: the PW2037, which powered the Boeing 757-200; the PW2040; and the PW2043 with a thrust of 43,000 lbf (190 kN).

Used on the C-17 Globemaster III aircraft, the F117-PW-100 engine is the military version of Pratt & Whitney’s PW2000 commercial engine. Because the F117 is derived from a commercial application, it meets all current and anticipated commercial engine requirements for low noise and exhaust emissions.

Specifications of the PW2000

Type: axial-flow tubrofan engine
Length: 141.4 inches (3,592 mm)
Diameter: 78.5 inches (1,994 mm)
Compressor: Axial
Combustors: Annular
Turbine: 8 stage axial
Maximum thrust: 43,000 pounds-force (190 kN)
Overall pressure ratio: 27.6-31.2