Boom made aviation history on the morning of January 28, 2025, with the first supersonic flight of our demonstrator aircraft, XB-1. After taking off from the Mojave Air & Space Port in California, XB-1 safely and successfully reached an altitude of 35,290 ft. before accelerating to Mach 1.122 (652 KTAS or 750 mph)—and breaking the sound barrier.With over 1,000 years of combined aerospace experience, the XB-1 team has devoted nearly two years to ground and flight testing. Each team member is driven by a deep passion for aviation and a singular mission: to make commercial supersonic flight a reality.During XB-1’s first supersonic flight, Chief Test Pilot Tristan “Geppetto” Brandenburg broke the sound barrier not just once, but three times.Here’s a closer look at each of XB-1’s test flights, documenting its progression up to the sound barrier and beyond: https://boomsupersonic.com/flyby/xb-1…