Nasa has flown an unmanned experimental jet to a speed that was just short of 10 times the speed of sound. The jet is called the X-43A - a supersonic...

Nasa has flown an unmanned experimental jet to a speed that was just short of 10 times the speed of sound. The jet is called the X-43A – a supersonic combustion ramjet (scramjet). Some commentators have speculated that scramjets could one day be used on passenger airliners, dramatically cutting long-haul journey times.

BBC Article

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