The Jayhawk Jet 120 engine (JJ-120) was designed to respond to the request for proposal issued by the American Institute of Aeronautics and Astronautics and the International Gas Turbine Institute for a half-scale unmanned Joint Strike Fighter power-plant.  The engine was named for its design mass flow rate, and the designer’s alma mater.  The chief design goal was to maximize efficiency – leading to the optimal balance between fuel and weight such that overall power-plant contribution to the aircraft weight could be minimized.  A critical mission point was defined as a subsonic cruise at Mach 0.9 at 40,000 ft, with additional subcritical mission points including standard sea level takeoff, super-cruise penetration and escape, and combative maneuvers.  Trade studies were performed to determine the optimal split between high and low pressure spools for high power extraction required by the extensive onboard avionics for unmanned systems.

                   The Jayhawk Jet 120 engine (JJ-120)!                                                      JJ-120 Engine Side View