Lockheed Martin and the U.S. Defense Advanced Research Projects Agency are investigating why contact with the first HTV-2 hypersonic test vehicle was lost soon after launch last week on a mission to demonstrate technology for high-speed, long-endurance flight. The third stage of the Orbital Sciences Minotaur IV Lite booster successfully completed energy-management maneuvers, released its clamshell payload fairing and deployed the HTV-2 at the edge of the atmosphere, but telemetry ...


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