Boom’s XB-1 jet breaks sound barrier on first supersonic flight - Boom’s inaugural XB-1 supersonic test flight reached speeds of more than 850 miles per hour

Boom Supersonic, the American company building what promises to be the world’s fastest airliner, broke the sound barrier for its first time with a test flight in Mojave, California, on Tuesday.

Boom ‘son of Concorde’ in bid to fly supersonic for first time The 'Son of Concorde' XB-1 jet is set to take off on its inaugural supersonic flight today, where it will break the sound barrier for the first time.