And the plane that would ultimately achieve that goal would be the experimental Bell X-1 jet. The National Advisory ... barrier was in fact a passable threshold. Yeager’s X-1, nicknamed ...

XB-1 is the world’s first independently developed supersonic jet and the first ... below the supersonic threshold of Mach 1. Tuesday’s test, however, will see the aircraft break the sound ...

A civilian jet broke the sound barrier for the first time Tuesday while making a historic test flight over the Mojave Desert. The XB-1 aircraft, manufactured by Boom Supersonic, was piloted by ...