As Pratt & Whitney works with the Air Force and Navy to improve the efficiency of the Joint Strike Fighter's F135 engine, the company is discussing options to field some of those upgrades on the F-22 Raptor's F119 engine. Through the Navy's Fuel Burn Reduction program, the company recently validated improvements to the F135 that could provide a 5 percent to 6 percent fuel burn improvement and a 6 percent to 10 percent thrust increase. The company is pitching that...
