Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Boom Supersonic passed a major milestone Tuesday on its path to ...
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, ...
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