Wind tunnel tests demonstrated the engine's successful operation under sustained high inlet temperatures, and the ability to make normal relights up to 60,000 ft (18,290 m), the limit of the wind tunnel in which the tests were conducted.
Wind tunnel testing demonstrated that the engine could function effectively at high inlet temperatures, and it successfully restarted under conditions up to 60,000 feet (18,290 meters) in altitude, which was the maximum capacity of the wind tunnel used for these tests.