X-51A Makes Longest Scramjet Flight

An engine first validated in a NASA wind tunnel successfully made the longest supersonic combustion ramjet-powered hypersonic flight to date off the southern California coast on May 26.


The air-breathing scramjet engine, built by Pratt & Whitney Rocketdyne, burned for more than 200 seconds to accelerate the U.S. Air Force's X-51A vehicle to Mach 5, or five times the speed of sound. It broke the previous record for the longest scramjet burn in a flight test, set by NASA's X-43 vehicle.
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Full story at http://spacefellowship.com/news/art20559/x-51a-makes-longest-scramjet-flight.html