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Key Test Set For Sustained Hypersonic Flight -- L.A. Times
The unmanned experimental aircraft X-51A WaveRider is expected to fly above the Pacific Ocean near Point Mugu at Mach 6 for 300 seconds Tuesday.
Since test pilot Chuck Yeager broke the sound barrier in 1947, engineers and scientists have dreamed of ever-faster aircraft. Now, they face one of their toughest challenges yet: sustaining hypersonic flight — going five times the speed of sound or more — for more than a few minutes.
In a nondescript hangar at Edwards Air Force Base in the Mojave Desert, a team of aerospace engineers has been putting the finishing touches on a lightning-quick experimental aircraft designed to fly above the Pacific Ocean at 3,600 mph. A passenger aircraft traveling at that speed could fly from Los Angeles to New York in 46 minutes.
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Update: Tomorrow's Test Of The X-51 Waverider Could Usher In A New Era Of Flight -- Business Insider
My Comment: I wish them the best.