Bell Boeing and Rolls-Royce have flight tested a modification, already being installed in AE1107C engines powering the V-22 Osprey, that increases the tiltrotor’s hot-and-high performance. Flight tests on a V-22 at Kirtland AFB in New Mexico validated that the Block 3 turbine, already in new engines and being retrofitted in others, increases capability up to 6,000 ft. altitude and 95F temperature. The tests come as the U.S. Navy seeks information from manufacturers on alternative ...

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