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X-59 experimental aircraft fires up its engine for first time on its way to takeoff

NASA's Quesst mission marked a major milestone with the start of tests on the engine that will power the quiet supersonic ...
Yahoo

NASA runs first engine tests on supersonic X-59 research aircraft

Nov. 6 (UPI) --NASA engineers fired the engines on the X-59 research aircraft in advance of planned test flights to determine if the aircraft can reduce sonic booms and make supersonic flight over ...