Williams FJ33

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The Williams International FJ33 is a family of turbofan jet engines intended for use in very light jet aircraft. Sources suggest that the FJ33 is a scaled-down version of the FJ44 engine.

Engine configuration is believed to be a single stage fan, with booster stage/s, driven by a 2 stage LP turbine, supercharging a centrifugal HP compressor, driven by a single stage HP turbine. An annular combustor is featured.

The FJ33 has a dry weight of less than 300 lb (140 kg), overall diameter of 21.05in, 47.9in overall length, and produces between 1000 and 1,800 lbf (8,000 N) static thrust. Specific fuel consumption at 1,200 lbf (5,300 N) thrust (SLS, ISA) is understood to be 0.486 lb/h/lbf.

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[edit] FJ33 versions

FJ33 leading particulars
FJ33-1 FJ33-2 FJ33-3 FJ33-4-A11 FJ33-4 FJ33-4-17M FJ33-4-18M FJ33-4A-19
Static thrust (lbf) 1,200 1,300 1,400 1,100 1,500 1,700 1,800 1,900
Specific fuel consumption (lb/(h·lbf)) SLS, ISA 0.486 ? ? ? ? ? ? ?
Bypass ratio 3.28 ? ? 3.4 ? ? ? ?
Dry weight (lb) <300 <300 <300 <300 <300 >310 >310 <300
Overall length (in) 47.9 47.9 47.9 47.9 47.9 47.9 47.9 ?
Approximate fan diameter (in) 17.3 17.3 17.3 17.3 17.3 17.3 17.3 ?

The -1, -2 , -3 and -4-A11 are believed to be essentially derated versions of the -4. Presumably the -17M and -18M are throttle pushed versions of the -4, but without any flat-rating to a hot day.

[edit] FJ33 applications

The FJ33 powers a number of different aircraft:

  1. Adam A700: 2× Williams FJ33 (company files bankruptcy in February 2008[1] )
  2. ATG Javelin Mk 10: 2× Williams FJ33-4-17M 1,700 lbf (7,600 N) static thrust (program stopped due to lack of funding)
  3. ATG Javelin Mk 20 military trainer: 2× Williams FJ33-4-18M 1,800 lbf (8,000 N) static thrust (program stopped due to lack of funding)
  4. Diamond D-Jet: single FJ33-4 1400 lbf static thrust, flat-rated to ISA+7.2C (not certified)
  5. Excel Sport Jet: single FJ33-4 (program stopped following accident)
  6. Maverick LEADER Jet: twin FJ33-4-A11 1100 lbf static thrust (not certified)
  7. Spectrum Aero Model 33: 2× Williams FJ33-4 (program stopped following accident)
  8. TAM-AIR Epic Jet: 2× Williams FJ33-4 (Epic Elite First Flight June 7 2007)
  9. Epic Victory (Will Switched to Pratt & Whitney PW600 engine for production
  10. TAMJet
  11. Safire Jet: twin FJ33-4-A11 1100 lbf static thrust (program stopped)
  12. Cirrus The-Jet FJ33-4A-19 1900 lbf static thrust (under development)

[edit] See also

[edit] External links

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