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Williams FJX-2

In 1996, Williams teamed with NASA to develop a smaller and lighte turbofan engine ”the FJX-2” for general aviation. The General Aviation Propulsion (GAP) program is part of NASA's Advanced General Aviation Transport Experiments (AGATE) program a joint NASA/industry venture to revitalize general aviation. AGATE was born at the 1992 Oshkosh convention.

Image Nasa : The FJX-2 turbofan engine in Glenn's Propulsion Systems Lab (PSL) altitude test chamber.

The FJX-2 is a high-bypass-ratio turbofan engine that produces 700 pounds of thrust, yet weighs only 85-100 pounds, about one-fourth the weight of piston engine propulsion systems with similar capabilities. To keep costs low, the FJX-2 team applied many lessons learned from research of automotive gas turbine engines. Emphasis was placed on simplifying design and reducing the number of parts. Low-cost design techniques and advanced automated manufacturing methods have led to the first turbine engine that is cost competitive with piston engines. While not as fuel efficient as today's comparable piston-powered aircraft, new turbofan jets will have equivalent or lower takeoff-to-landing fuel consumption.

The FJX-2 Turbofan Engine Prior to the Initial test Run. Source : NASA/CR—2008-215266
The revolutionary FJX-2 turbofan engine developed in the GAP program. Source : NASA