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On October 31, 2014, VSS ''Enterprise'', a Virgin Galactic Scaled Composites Model 339 SpaceShipTwo experimental spaceflight test vehicle, suffered a catastrophic in-flight breakup and crashed in the Mojave Desert, California, United States while performing a test flight.〔〔 The co-pilot, Michael Alsbury, was killed and the pilot, Peter Siebold, was seriously injured. ==Aircraft== The vehicle in the accident, VSS ''Enterprise'', registration N339SS, was the sole Scaled Composites Model 339 SpaceShipTwo test vehicle.〔 It was the first of the five SpaceShipTwo craft planned by Virgin Galactic.〔 Since October 2010, VSS ''Enterprise'' had flown 20 captive flights while remaining attached to its WhiteKnightTwo carrier aircraft, 31 unpowered glide-to-landing tests, and three rocket-powered test flights. There were several performance issues during the ship engine's development in 2012 and 2013.〔(【引用サイトリンク】title=Virgin Galactic was reportedly too aggressive with commercial launch timeline )〕 A rocket-powered test flight of SpaceShipTwo took place on April 29, 2013, with an engine burn of 16 seconds duration. The brief flight began at an altitude of , and reached a maximum altitude of and a speed of Mach 1.2 ().〔 In order to receive a Federal Aviation Administration license to carry passengers, the craft needs to complete test missions at full speed and altitude. A second SS2 vehicle, VSS ''Voyager'', is under construction, as of November 2014. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「VSS Enterprise crash」の詳細全文を読む スポンサード リンク
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