From slashdot.org
Boom's XB-1 Supersonic Demonstrator Makes First Flight - Slashdot
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Boom Supersonic's first aircraft, the XB-1, completed its first flight today and met "all of its test objectives." From a report: This initial test only saw the aircraft 7,120 feet above sea level and fly at a top speed of 238 knots (274 mph) -- far from Mach 1, the speed of sound. The first flight...
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on Mar 23