Friday, September 24, 2010

Pratt & Whitney PW4000

The PW4000 is a two-spool, high-bypass turbofan engine which was developed by Pratt & Whitney to power the Boeing 777 and Airbus A300 aircraft. Based on fan diameter, the PW4000 is divided into 3 distinct families. The PW4000 features advanced technology materials and Full Authority Digital Engine Control (FADEC), for good fuel economy and reliability.

The first family is the 94 inch (2.4 m) diameter fan with certified thrust ranging from 52,000 to 62,000 lbf (230 to 275 kN). It powers the Airbus A310-300 and A300-600 aircraft and Boeing 747-400, 767-200/300 and MD-11 aircraft and is certified for 180-minute ETOPS if used in twinjets. These models include the PW4052, PW4056, PW4060, PW4062, PW4062A, PW4152, PW4156A, PW4156, PW4158, PW4460, and PW4462.

The second family is the 100 inch (2.5 m) diameter fan engine developed specifically for Airbus Industrie's A330 twinjet. It has certified thrust from 64,500 to 68,600 lbf (287 to 305 kN). Models are numbered PW4164, PW4168, and PW4168A. The third family is the 112 inch (2.8 m) diameter fan engine developed specifically for Boeing's 777 where it was the launch engine. It has certified thrust from 86,760 to 99,040 lbf (386 to 441 kN).

Specifications for the Pratt & Whitney PW400-100

Type: Two spool high bypass ratio Turbofan
Length: 163.1 in (4.14 m)
Diameter: 100 in (2.54 m) (fan)
Compressor: 1 stage fan, 5 stage low pressure compressor, 15 stage (5 variable) high pressure compressor
Combustor: Annular
Turbine: 2 stage high pressure turbine, 5 stage low pressure turbine
Maximum thrust: 64,000 - 70,000 lbf (284.7 - 311.4 kN)
Overall pressure ratio: 32.0:1 - 35.4:1
Bypass ratio: 5.0:1

Pratt & Whitney PW4000 on Boeing 777