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AEDC PHOTO # 92-22320

THE PRATT & WHITNEY 4084, which started testing at the Air Force's Arnold Engineering Development Center in the fall of 1992, is the largest turbine engine ever tested at AEDC. The engine stands ten feet in height, has a 112-inch diameter fan and a thrust capability in the 73,000 to 90,000-pound range. It is being developed to power the new generation of commercial aircraft and is scheduled to be used on the new Boeing 777. AEDC and Pratt & Whitney signed a 20-year alliance, potentially worth $350 million, in December 1992 to test the companies jet engines at AEDC.

OFFICE OF PUBLIC AFFAIRS
ARNOLD ENGINEERING DEVELOPMENT CENTER
100 KINDEL DRIVE, SUITE B-213
ARNOLD AFB, TENN 37389-2213
(931) 454-5586