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Pratt & Whitney PW4000

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The Pratt & Whitney PW4000 is a family of high-bypass turbofan aircraft engines with certified thrust ranging from 52,000 to 99,040 lbf (230 to 441 kN). Built as the successor to the JT9D series engines, it has found much wider application than its predecessor.

PW4000
PW4000-112 (cropped).jpg
PW4098
Type Turbofan
National origin United States
Manufacturer Pratt & Whitney
First run April 1984
Major applications Airbus A300
Airbus A310
Airbus A330
Boeing 747-400
Boeing 767
Boeing 777
Boeing KC-46
McDonnell Douglas MD-11
Produced 1986–present
Developed from Pratt & Whitney JT9D
Developed into Engine Alliance GP7000

Design and developmentEdit

The PW4000 is divided into three distinct families based on fan diameter.

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, A300-600 aircraft, Boeing 747-400, 767-200/300, KC-46A, and McDonnell Douglas MD-11 aircraft and is certified for 180-minute ETOPS if used in twinjets. These models include the PW4050, PW4052, PW4056, PW4060, PW4062, PW4152, PW4156, PW4158, PW4160, PW4460, PW4462 and PW4650.

 
A Pratt & Whitney PW4098 engine at the Steven F. Udvar-Hazy Center

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 include the PW4164, PW4168 and PW4170. The launch of the Advantage70 program was announced at the 2006 Farnborough Airshow with a sale to Kingfisher Airlines. This package increases certified thrust to 70,000 lbf (311 kN), reduces fuel burn by about 1%, and reduces maintenance costs by around 15%.

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. Currently available on the 777-200ER, it has certified thrust from 86,760 to 99,040 lbf (386 to 441 kN). Models include the PW4074, PW4077, PW4084, PW4090 and PW4098. It entered service on June 7, 1995, with United Airlines, and was the first jet engine to enter service with 180-minute ETOPS certification. It was also an engine option for the 777-200 and -300.

The PW4000 features advanced technology materials and Full Authority Digital Engine Control (FADEC), for enhanced fuel economy and reliability, as well as the Technology for Advanced Low NOx (TALON) combustor.[1]

VariantsEdit

 
A Pratt & Whitney PW4098 engine for advanced Boeing 777 models at Boeing's Future of Flight museum

PW4000-94Edit

Thrust range: 231–276 kN (52,000 lbf – 62,000 lbf)[2]

PW4000-100Edit

Thrust range: 287–311 kN (64,500 lbf – 70,000 lbf)[3]

PW4000-112Edit

Thrust range: 329–436 kN (74,000 lbf – 98,000 lbf)[4]

ApplicationsEdit

A -94 powering the Boeing 767 with 38 fan blades
A -100 powering the Airbus A330 with 34 fan blades
A -112 powering the Boeing 777 with 22 fan blades

SpecificationsEdit

The PW4000 is produced in three distinct models, with differing LP systems to address different thrust needs.

Variant -94[5] -100[6] -112[7]
Type Two spool high bypass ratio Turbofan
Length 153.6 in (390 cm) 167.2 in (425 cm) 190.4 in (484 cm)
Weight 9,420 lb
4,273 kg
12,900 lb
5,851 kg
15,095–15,741 lb
6,847–7,140 kg
16,260 lb
7,375 kg
Compressor 1 fan, 4 LP, 11 HP 1 fan, 5 LP, 11 HP 1 fan, 6 LP, 11 HP 1 fan, 7 LP, 11 HP
Combustor Annular
Turbine 2 HP, 4 LP 2 HP, 5 LP 2 HP, 7 LP
Thrust 50,000–62,000 lbf
222–276 kN
64,500–70,000 lbf
287–311 kN
77,440–91,790 lbf
344–408 kN
91,790–99,040 lbf
408–441 kN
Variant -94[8] -100[9] -112[10]
Fan 94 in (239 cm) 100 in (254 cm) 112 in (284 cm)
Bypass ratio 4.8-5:1 4.9:1 5.8-6.4:1
Overall pressure ratio 27.5-32.3 32.0-34.1 34.2-42.8
Fan pressure ratio 1.65-1.80 1.75-1.76 1.70-1.80
Applications B747-400, B767, MD-11
A300-600, A310
A330 B777

See alsoEdit

ReferencesEdit

  1. ^ Jeff Schweitzer, Pratt & Whitney (14–17 July 2003). "Propulsion Technology Readiness for Next Generation Transport Systems". AIAA International Air and Space Symposium and Exposition. doi:10.2514/6.2003-2787.
  2. ^ Pratt & Whitney. "PW4000-94". Retrieved 20 July 2019.
  3. ^ Pratt & Whitney. "PW4000-100". Retrieved 20 July 2019.
  4. ^ Pratt & Whitney. "PW4000-112". Retrieved 20 July 2019.
  5. ^ "TCDS E24NE" (PDF). FAA. 23 November 2015.
  6. ^ "TCDS E36NE" (PDF). FAA. 28 May 2014.
  7. ^ "TCDS E46NE" (PDF). FAA. 23 January 2012.
  8. ^ "PW4000 94-inch-fan" (PDF). Pratt & Whitney.
  9. ^ "PW4170 Engine for the A330" (PDF). Pratt & Whitney.
  10. ^ "PW4000 112-inch-fan" (PDF). Pratt & Whitney.
  • Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. ISBN 0-7509-4479-X.

External linksEdit