The U.S. Air Force and Defense Advanced Research Projects Agency are setting up an engineering review board to investigate the loss of the second, and final, Hypersonic Test Vehicle (HTV-2) shortly after launch from Vandenberg AFB, Calif. on Aug 11. The Lockheed Martin-built hypersonic glide vehicle was placed into its correct trajectory by an Orbital Sciences Minotaur IV, and initial telemetry indicated the Mach 20 glide phase had begun. Around 9 min. into the flight, contact with the ...


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