The XB-1 demonstrator has broken the speed of sound, hitting Mach 1.1. It is the first civil supersonic aircraft in US history and the first to do so since Concorde was retired in 2003. That was an ...
The aircraft, flown by Boom’s chief test pilot ... It’s now almost 55 years since the 002 prototype for Concorde first flew at Mach 1 on March 25, 1970, and more than 21 years since commercial ...