The biggest issues that the Concorde faced in its heyday were complaints about its deafening sonic boom and its high fuel consumption. Multiple modern aerospace organizations and companies like ...

"The second half of our test campaign is all about expanding XB-1's envelope incrementally in altitude, air speed, and Mach number until we inevitably make that sonic boom," Nick Sheryka ...

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 ...