Ten months after its long-delayed first subsonic flight took place last March, Boom Supersonic’s prototype test plane, the XB-1, broke the sound barrier today three times during its 12th flight. The XB-1 is a smaller-scale demonstration version of the larger Overture airliner Boom wants to eventually build that will carry 64 passengers on supersonic international flights at cruising speeds of up to Mach 1.7, similar to service that the Concorde offered before it retired in 2003.
After…
