BOOM XB-1 PUSHES THE SOUND BARRIER BEFORE SUPERSONIC FLIGHT

Summary from the TLDR newsletter

The Boom Supersonic XB-1 prototype reached a transonic speed of Mach 0.95 during Test Flight 11 on January 10. Transonic speed is when some areas of the airflow over the airframe exceed the speed of sound. During the flight, the XB-1 was subjected to dynamic pressures of up to 383 Knots Equivalent Air Speed, which is a pressure greater than what it would experience when flying supersonic at Mach 1.1. The company has now completed 11 test flights, each incrementing to reach supersonic speed.