Flown by Boom Supersonic’s chief test pilot, Tristan “Geppetto” Brandenburg, the aircraft called XB-1 reached an altitude of 35,290 feet before accelerating to Mach 1.122, or 750 mph ...

Boom Supersonic passed a major milestone Tuesday on its path to reintroduce supersonic commercial flights. After years of testing and refinement, a pilot flying the aerospace company’s XB-1 ...

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Ten months after its long-delayed first subsonic flight took place last March, Boom Supersonic’s prototype test plane, the XB-1, broke the sound barrier today three times during its 12th flight.

Boom Supersonic’s XB-1 demonstrator plane just went supersonic in the skies over California’s Mojave Desert, making it the first civil aircraft to break the sound barrier. The American startup ...

Boom Supersonic's XB-1 demonstrator aircraft soared past the speed of sound in a test flight on Tuesday—the first time a plane has accomplished that feat without the fuels of government ...

Boom Supersonic's XB-1 demonstrator plane just went supersonic in the skies over California's Mojave Desert, making it the first civil aircraft to break the sound barrier. The American startup's ...