Boom Supersonic, the American company building what promises to be the world’s fastest airliner, broke the sound barrier for ...

The Colorado-based company is aiming to build a Concorde-like supersonic aircraft—but has hurdles to clear before realizing ...

Boom Supersonic flew its XB-1 test jet at about the speed of sound, a major step as the company works toward the daunting job ...

On its 12th test flight, the Boom XB-1 prototype broke the sound barrier three times and achieved a top speed of Mach 1.1.

During the 44-minute Flight 11, Boom Chief Test Pilot Tristan “Geppetto” Brandenburg soared the XB-1 to an altitude of 29,481 ...

XB-1 then slowed below Mach 1 and sped past that threshold two more times, reaching a top speed over the flight that Boom ...

The Boom Supersonic aircraft exceeded Mach 1 after taking off from the Mojave Air and Space Port in California for its highly ...

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 ...

Boom Supersonic's XB-1 made history on Tuesday by becoming the first civil aircraft to break the sound barrier. Before ...

XB-1’s supersonic flight took place in the same historic airspace where Chuck Yeager broke the sound barrier for the first ...

The aircraft, flown by Boom’s chief test pilot Tristan “Geppetto” Brandenburg, accelerated to Mach 1.122 (652 knots true airspeed or 750 miles per hour) — about 10% faster than the speed ...