Williams FJX-2

The Williams 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.

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

In 1996, Williams teamed with NASA to develop a smaller and lighte turbofan engine ”the Williams 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.

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 first FJX-2 turbofan engine was fully assembled on December 18, 1998, by Williams International in Walled Lake, Michigan, marking a major milestone in the GAP program. On December 22, 1998, the first operational test of the new FJX-2 engine was conducted in the Williams static test facility. The engine was then disassembled for inspection and found to be in excellent condition.

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


Williams V-Jet II

Built by Scaled Composites under contract to William, the Williams V-JET II made its first flight on April 13, 1997 NASA has hard partnered with the general aviation industry in introducing the V-JET II, a...