Boeing/USAF X-51 WaveRider
Boeing
On May 1, this 25-foot, 4,000-pound test bed for future missiles survived the longest air-breathing hypersonic flight: three minutes at Mach 5. It’s the first true flight of a scramjet, a type of vehicle in which supersonic force pulls, burns, and accelerates oxygen without any moving parts (at these speeds, they’d melt).
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