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 ...
The test flight was a milestone for Boom Supersonic, the small jet’s builder that is hoping to eventually bring supersonic air travel to the masses. “And she’s airborne,” said Mike ...