The X-51A WaveRider, an unmanned aircraft that ... at six times the speed of sound, or about 3,600 mph (5,800 kph). The unmanned X-51 WaveRider was expected to reach Mach 6 after it's dropped ...

The aircraft, built and tested in Southern California, was designed to hit Mach 6, or six times the speed of sound, and fly for five minutes. But that didn’t happen. The engine never even roared ...

Companies, countries developing 'hypersonic' travel – more than 6x the speed of sound Texas-based ... world's first “hypersonic” aircraft. The Mach 6-capable planes, using rockets instead ...

helping researchers to design advanced aircraft and missiles. Steven Schneider operates the one-of-a-kind wind tunnel No other wind tunnel runs quietly while conducting experiments in airstreams ...