Boom Supersonic sans Sonic boom

Boom Supersonic now says Overture can avoid sonic booms, potentially opening up overland flights even at Mach 1 or higher.
And yet, knowing what I know about the climate, the promise of a return to supersonic flight is a little tarnished. We’re in ...
American space agency NASA announced it has concluded the ground engine tests for the X-59 supersonic airplane, first flight coming later this year ...
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