Sonic Boom

X-59 hits altitude and speed milestones as flight testing continues

NASA steps closer to beginning a series of 'community overflights' to evaluate public perception of the X-59's sonic signature. NASA's X-59 quiet-supersonic demonstrator reached 55,000ft and Mach 1.4 during a 12 June flight, achieving a key programme milestone six weeks after the aircraft took off for the first time. The agency had been eager for…