Super Secret Hypersonic Aircraft Flew Out of Its Skin!
The Sheffield United striker's lawyers said he "maintains his innocence". Super Secret DARPA Hypersonic Aircraft Flew Out of Its Skin April 24, 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. Cause Of Hypersonic Plane Crash Revealed, Super Secret Hypersonic Aircraft Flew Out of Its Skin. While the letter doesnt spell out where the aircraft would be deployed.