The XB-1 prototype accelerated smoothly to reach as fast as Mach 1.11 at about 35,000 feet at 11:33 a.m., 11:38 a.m. and 11:45 a.m. Mach 1 is equal to the ...
About 35,000 feet (10,670 meters) over the Mojave Desert, northwest of Los Angeles, Boom Supersonic's XB-1 became the first ...
Boom Supersonic's XB-1 demonstrator jet became the first U.S.-made civilian supersonic jet to break the sound barrier ... Boom said it completed construction on its Overture Superfactory in ...
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