made it the first civil supersonic jet made in the U.S. to break the sound barrier. Manned by Boom Supersonic's chief test pilot Tristan "Geppetto" Brandenburg, the XB-1 launched in the early hours of ...
The XB-1's flight, livestreamed from the Mojave Air & Space Port in California, made it the first civil supersonic jet ... speed Mach 1.122, or about 750 mph, according to a press statement from Boom.