The design was quickly grounded after repeated incidents caused by flying the now overweight airframe and a number of engine failures that led to the loss of the aircraft.

The program failure was primarily due to lack of investment in research and experimental resources by Westinghouse, leaving them unable to resolve the issues with the various models of the engines.

In 1953 Westinghouse worked with Rolls-Royce to offer engines based on the Avon, which had similar performance but matured into an excellent design of even higher output.

While most early engines in the US were redesigned versions of British jets, the J30 was the first truly American-designed turbojet to run, and saw use in the McDonnell FH Phantom.

According to an article in the April 1949 edition of the Naval Aviation Confidential Bulletin by Lieutenant Commander Neil D. Harkleroad of the Bureau of Aeronautics Power Plant Division, "The engine has been operating successfully to date."

These included the Grumman XF10F Jaguar variable-sweep wing general-purpose fighter, the McDonnell F3H Demon and Douglas F4D Skyray interceptors.

The lower-powered early development models were now intended to be used only for ground and initial flight testing until the high-powered engines became available.

It has been stated, that although considered failures, the F3H-1 could have been competitive with early supersonic Air Force's Century Series fighters had the original engines delivered on their design specifications.

[2] In fact, the Demon that emerged from development was a missile-armed all-weather fighter over 8,000 lb (3,600 kg) heavier than the XF3H-1 had been, and even the high-powered J71 could not restore its performance.

The F3H-1N Demon single-engine jet fighter was initially a severe disappointment, due to the unreliability of the J40 and the difficulties of flying the much heavier airframe with the lower-powered J40-WE-22A engines.

[3] The decision to move the Demon to the J71 had occurred long before the initial production batch emerged and with the development of a suitable afterburner for the J71 being protracted, BuAer decided to accept the early aircraft with Westinghouse J40-WE-22A and -22 engines.

The F10F-1 program was cancelled primarily due to unsolvable aerodynamic issues with the variable-sweep wing and the control systems.