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 ...

It took off with a bang. Boom Supersonic’s XB-1 jet broke the sound barrier for the first time on Monday as the American company seeks to deliver the world’s faster airliner capable of ...

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The countdown has begun for the XB-1’s “historic” first supersonic test flight that should break the sound barrier, according to Boom Supersonic. The test flight for the Boom Supersonic XB-1 ...

Boom Supersonic's XB-1 demonstrator jet became the first U.S.-made civilian supersonic jet to break the sound barrier. The independently funded XB-1 reached a speed of Mach 1.122, or about 750 mph ...

Boom Supersonic's XB-1 test vehicle is scheduled to lift off today (Jan. 28) at 11 a.m. EST (1600 GMT). Editor's note: Boom Supersonic successfully broke the sound barrier with the XB-1 today in a ...

During the XB-1's historic flight on Tuesday—its 12th test flight overall—the aircraft stayed supersonic for around four minutes before breaking the sound barrier two more times during the ...

Boom Supersonic's XB-1 demonstrator craft could become the first commercial jet to break the sound barrier since Concorde after acing its 11th test and reaching 0.95 Mach at low altitudes.