Williams FJ44

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Template:Short description Template:Primary

FJ44
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A Williams FJ44-3ATW turbofan engine
Type Turbofan
National origin United States
Manufacturer Williams International
First run 1985[1]
Major applications Beechcraft Premier I
Cessna CitationJet
Piper PiperJet Altaire
Saab 105
Grob G180 SPn
Pilatus PC-24
Developed into Williams FJ33

The Williams FJ44 is a family of small, two-spool, turbofan engines produced by Williams International for the light business jet market. Until the recent boom in the very light jet market, the FJ44 was one of the smallest turbofans available for civilian applications. Although a Williams design, Rolls-Royce was brought into the project at an early stage to design, develop, and manufacture an air-cooled high-pressure (HP) turbine for the engine. The FJ44 first flew on July 12, 1988 on the Scaled Composites/Beechcraft Triumph aircraft.

The Williams FJ33 is a newer, smaller engine based on the basic FJ44 design.

Development

Production started in 1992 with the Script error: No such module "convert". thrust FJ44-1A. The FJ44-1C is derated to Script error: No such module "convert".. The uprated to Script error: No such module "convert". FJ44-2A was introduced in 1997. The Script error: No such module "convert". thrust FJ44-3A was introduced in 2004. In 2005, a new low end version, the FJ44-1AP, was introduced, with a Script error: No such module "convert". takeoff thrust. Released in 2007 was the new Script error: No such module "convert". thrust FJ44-4. In 2010 this engine was in use on the Cessna CJ4, and since 2018 also on the new Pilatus PC-24.

Design

The FJ44-1A has a single stage blisk fan plus a single intermediate pressure (IP) booster stage, both driven by a 2 stage low pressure (LP) turbine, and supercharging a single stage centrifugal high pressure (HP) compressor, driven by a single stage uncooled high pressure (HP) turbine. The combustor is an impingement cooled annular design. Fuel is delivered to the combustor through an unusual rotating fuel nozzle system, rather than the standard fuel-air mixers or vapourisers. The bypass duct runs the full length of the engine. The FJ44-2A has two additional booster compressor stages.

Variants

FJ44-1A
Script error: No such module "convert". thrust, production started in 1992, Script error: No such module "convert". diameter fan, SFC at full thrust at SLS, ISA is understood to be 0.456 lb/(hr lbf),
FJ44-1AP
Script error: No such module "convert". takeoff thrust, introduced in 2005, 5% better specific fuel consumption, lower internal temperatures, similar to the -1A with a higher pressure ratio fan, a new combustor and LP turbine, a new full length bypass duct/exhaust mixer and a dual channel FADEC.[2]
FJ44-1C
Script error: No such module "convert". thrust, derated version of the FJ44-1A, SFC of Script error: No such module "convert"..[3][4]
FJ44-2A
Script error: No such module "convert". thrust, introduced in 1997, larger Script error: No such module "convert". diameter fan, with two additional booster stages to increase core flow, centrifugal compressor throttled-back aerodynamically to a lower HPC pressure ratio than the -1, exhaust mixer and a fuel electronic control unit.[5]
FJ44-2C
Script error: No such module "convert". thrust, similar to the -2A with an integrated hydromechanical fuel control unit.
FJ44-3A
Script error: No such module "convert". thrust, 2004 introduction, similar to the -2A with a larger fan and dual channel FADEC unit.[6]
FJ44-3A-24
Script error: No such module "convert". thrust, derated -3A.
FJ44-3AP
Script error: No such module "convert". thrust.[7]
FJ44-4A
Script error: No such module "convert". thrust, released in 2007, hi-tech fan of larger diameter than the -3 unit.[8] Used on the Cessna CJ4 and the Pilatus PC-24.
FJ44-4C
3,450 lbf (15.3kN) thrust. Used on the upcoming Honda HA-480 Echelon.[9][10]
FJ44-4M
Williams-Rolls F129
Military designation for the derated FJ44-1C with Script error: No such module "convert". thrust.

Applications

File:OO-FLN.JPG
2,000 CitationJets have been delivered by June 2017[11]
Variant Application Type Deliveries
FJ44-1[12] Cessna CitationJet CJ1/CJ1+/M2 Business jet 1993-
SAAB Sk60 Jet trainer re-engine
FJ44-2[13] Beechcraft Premier 1A Business jet 2001-2012
Cessna CitationJet CJ2 Business jet 2000-2005
Cessna Citation 501SP Business jet re-engineTemplate:Efn
Cessna Citation 550 Business jet re-engineTemplate:Efn
Scaled Composites Proteus Experimental 1998
Syberjet SJ30 Business jet 2007-2009
Learjet 25 Business jet re-engineTemplate:Efn
Virgin Atlantic GlobalFlyer Experimental 2005
FJ44-3[14] Cessna CitationJet CJ2+/CJ3+ Business jet 2004-
Cessna Citation 550 Business jet re-engineTemplate:Efn
Nextant 400XTi Business jet re-engine
FJ44-4[15] Cessna CitationJet CJ4 Business jet 2010-
Hawker 400XPR Business jet re-engine
Pilatus PC-24 Business jet 2018-
FJ44-4M Aero L-39 Skyfox Jet trainer
Light attack aircraft		 2022-
FJ44-4M-34 Alenia Aermacchi M-345 Jet trainer 2018-
not deliveredScript error: No such module "Unsubst". Cessna 526 CitationJetTemplate:Efn Jet trainer 2 prototypes
Eviation Jets EV-20 Vantage Jet Business jet 1 prototype
Grob G180 SPn Business jet 4 prototypes
Hawker 200 Business jet Cancelled
Lockheed Martin Polecat Drone Crashed
Lockheed Martin RQ-3 DarkStar Drone Cancelled
Piper PA-47 PiperJet/Altaire Business jet 1 prototype
Scaled Composites Triumph Business jet 1 prototype

Specifications

Type Certificate Data Sheet[16]
Variant FJ44-1AP[17] FJ44-2[18] FJ44-3[19] FJ44-4[20]
Configuration Twin-spool turbofan with 1-stage fan and annular combustor
LP compressor 1-stage axial 3-stage axial
HP compressor 1-stage centrifugal
Turbine 1-stage HP, 2-stage LP
Thrust Template:Cvt Template:Cvt Template:Cvt Template:Cvt
Weight Template:Cvt Template:Cvt Template:Cvt Template:Cvt
Length Template:Cvt Template:Cvt Template:Cvt Template:Cvt
Diameter Template:Cvt Template:Cvt Template:Cvt Template:Cvt

See also

Related development

Related lists

References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ FJ44-1AP Template:Webarchive at www.williams-int.com, Accessed 2006-05-07
  3. ↑ FJ44-1 Template:Webarchive at www.williams-int.com, Accessed 2006-05-07
  4. ↑ FJ44 for military trainer aircraft Template:Webarchive at defence.rolls-royce.com Template:Webarchive, Accessed 2006-05-07
  5. ↑ FJ44-2 at www.williams-int.com, Accessed 2006-05-07
  6. ↑ FJ44-3 Template:Webarchive at www.williams-int.com, Accessed 2006-05-07
  7. ↑ Williams Fanjet Family, Accessed 2020-02-20
  8. ↑ FJ44-4 Template:Webarchive at www.williams-int.com, Accessed 2010-03-12
  9. ↑ Script error: No such module "citation/CS1".
  10. ↑ Script error: No such module "citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".
  17. ↑ Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Script error: No such module "citation/CS1".
  20. ↑ Script error: No such module "citation/CS1".

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Notes

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External links

Template:Sister project

Template:Williams aeroengines Template:US military gas turbine aeroengines Template:Swedish military gas turbine aeroengines

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