The US National Transportation Safety Board (NTSB) investigation team probing the cause of the Oct. 31 crash of Virgin Galactic’s SpaceShipTwo spaceplane said two seconds before beginning to break-up in midair the vehicle’s two moveable tail booms unexpectedly began to deploy into a “feathering” position. Revealing the findings, NTSB acting chairman Christopher Hart said camera footage and telemetry show that around nine seconds after ignition of the hybrid rocket the ...

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