Williams FJ33

FJ33
Type	Turbofan
National origin	United States
Manufacturer	Williams International
First run	1998
Major applications	Cirrus Vision SF50 ; Diamond D-Jet
Developed from	Williams FJ44

The Williams FJ33 is an American family of turbofan jet engines intended for use in very light jet aircraft. The FJ33 is a scaled-down version of the FJ44 engine. The FJ33-5A is the latest version certified in June 2016.^[2]

Design

Engine configuration is a single stage fan, with booster stage, driven by a two-stage LP turbine, supercharging a centrifugal HP compressor, driven by a single stage HP turbine.^[3] An annular combustor is featured.

The FJ33 has a dry weight of less than 300 lb (140 kg), overall diameter of 18.36 in (466 mm), 38.43 in (976 mm) overall length, and produces between 1,000 lbf (4,400 N) 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/(lbf⋅h) (13.8 g/(kN⋅s)).

Variants

FJ33-1 FJ33-2 FJ33-3 FJ33-4-A11 FJ33-4 FJ33-4-17M FJ33-4-18M FJ33-4A-19 FJ33-5A Jahesh-700

Iran apparently reverse engineered a variant, and is using it as high endurance UAV powerplant.^[4]^[5]

Applications

Specifications (FJ33-5A)

General characteristics

Type: turbofan
Length: 38.43 in (976 mm)
Diameter: 18.36 in (466 mm),
Dry weight: less than 300 lb (140 kg)

Components

Compressor: 2 spool, 1-stage fan and 3-stage LP axial, 1 centrifugal
Turbine: 2 spool, 1 HP and 2 LP

Performance

Maximum thrust: 1,846 lb_f (8.21 kN)
Specific fuel consumption: 0.486 lb/lbf/h (13.77 g/kN/s)
Thrust-to-weight ratio: 6

References

^ "P&WC unveils light jet study". Flight International. 28 October 1998.
^ "Williams International FJ33-5A Turbofan FAA-Certified". 8 June 2016. Retrieved 10 June 2016.
^ "EM-9303-05i" (PDF). sistemas.anac.gov.br.
^ "Iran Flaunts New Missile and Jet Engine Technology". The Washington Institute. Retrieved 2022-06-10.
^ "Iran's 1st turbofan engine: Jahesh-700". iranpress.com. Retrieved 2022-06-10.

External links

[1] "P&WC unveils light jet study". Flight International. 28 October 1998.

[2] "Williams International FJ33-5A Turbofan FAA-Certified". 8 June 2016. Retrieved 10 June 2016.

[3] "EM-9303-05i" (PDF). sistemas.anac.gov.br.

[4] "Iran Flaunts New Missile and Jet Engine Technology". The Washington Institute. Retrieved 2022-06-10.

[5] "Iran's 1st turbofan engine: Jahesh-700". iranpress.com. Retrieved 2022-06-10.

[2]