Lockheed Martin's X-59 experimental quiet supersonic aircraft completed its first flight, moving toward NASA testing for ...
The National Interest on MSN
How Were Modern Helicopters Invented?
The idea of the helicopter dates back to the Renaissance—but the contraptions could not be built until the development of modern aerospace engineering during the interwar period.
NASA's X-59 supersonic-but-quiet jet soared over the Southern California desert on Tuesday in the first test flight of an ...
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