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Published: Feb 21, 2007

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This article was Originally Published on Apr 19, 2006 in Volume: 5  Issue: 1

JSF engine experiencing overheating issues

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The primary engine for the F-35B Joint Strike Fighter is currently operating at about 190 degrees Fahrenheit above the desired temperature for the test program, according to Pratt & Whitney officials. The company wants to cut the excessive heat in the short takeoff vertical landing (STOVL) aircraft engines by about half this summer. A specific area of concern is the rotor inlet temperature margin, according to company officials. Pratt & Whitney spokesman Matthew Perra told MAT that the company plans to bring the margin down by adjusting the engine’s bypass ratio to optimize air flow through the engine’s core where the most extreme temperatures are experienced. He also said there is no military requirement for the margin and that the STOVL engine has already demonstrated the 40,550 lb. specification level of thrust. Pentagon officials and Congress are debating whether an alternative F136 engine made by GE-Rolls Royce will remain a part of the Joint Strike Fighter program.

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