Antelope Valley Press2 天
Bittersweet flight milestone
Boom Supersonic’s XB-1 technology demonstrator broke the sound barrier three more times Monday morning in its final flight, ...
Space.com2 天
Boom Supersonic's XB-1 jet breaks sound barrier 3 times on final test flight (video, photos)
The XB-1 broke the sound barrier three times during its 13th and final test flight, which lifted off Monday from the Mojave ...