Williams FJ33

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.

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. An annular combustor is featured.

The FJ33 has a dry weight of less than 300 lb, overall diameter of 18.36 in, 38.43 in overall length, and produces between 1000 lbf and 1800 lbf static thrust. Specific fuel consumption at 1200 lbf thrust (SLS, ISA) is understood to be 0.486 tsfc.

Variants
Iran apparently reverse engineered a variant, and is using it as high endurance UAV powerplant.
 * FJ33-1
 * FJ33-2
 * FJ33-3
 * FJ33-4-A11
 * FJ33-4
 * FJ33-4-17M
 * FJ33-4-18M
 * FJ33-4A-19
 * FJ33-5A
 * Jahesh-700

Applications

 * Adam A700
 * ATG Javelin
 * Cirrus Vision SF50
 * Diamond D-Jet
 * Epic Elite
 * Flaris LAR01
 * Spectrum S-33 Independence
 * Sport Jet II
 * Eclipse 700