Boom’s XB-1 test craft has flown at supersonic speeds for a second time following its first flight last month, and this time nobody heard a thing. Microphones below the flight path confirmed no sonic boom was audible at the ground.
That matters because FAA regulations ban supersonic flight over land due to the risk of sonic boom damage. Boom hopes boomless flight could change that, and already has Elon Musk’s ear.
[boomsupersonic.com]















