Apr 24

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Super Secret Hypersonic Aircraft Flew Out of Its Skin (ABC News, April 23, 2012):

It turns out that tearing through the atmosphere at 20 times the speed of sound is bad for the skin, even if you’re a super high-tech aircraft developed by the government’s best engineers at its far-out research agency.

DARPA, the Defense Advanced Research Project Agency, has made public its best guess about what might have caused its unmanned arrowhead-shaped Hypersonic Technology Vehicle (HTV-2) to suddenly lose contact and crash in the Pacific just a few minutes after slicing through the sky at Mach 20 last August: it was going so fast its skin peeled off.

After an eight-month investigation, DARPA concluded that even though the HTV-2 was expected to lose some of its skin mid-flight, “larger than anticipated portions of the vehicle’s skin peeled from the aerostructure,” the agency said in a statement Friday.

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