Two weeks ago, Boom Supersonic’s XB-1 demonstrator plane made history when it broke the sound barrier over the continental ...
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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 ...
On its 12th test flight, the Boom XB-1 prototype broke the sound barrier three times and achieved a top speed of Mach 1.1.
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