A Plane Just Achieved Supersonic Flight Without the Sonic Boom
But while the successful test flight of XB-1 shows that supersonic flight without sonic booms is technically feasible, the next phase is making it economically feasible. Right now, both subsonic and ...
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How the XB-1 aircraft went supersonic without a sonic boom
When the experimental XB-1 aircraft broke the sound barrier three times during its first supersonic flight on 28 January, it did not produce a sonic boom audible from the ground, according to US ...