Scaled Composites and Virgin Galactic have taken another step toward flying SpaceShipTwo (SS2) in suborbital space, following the completion of a third powered flight that evaluated a new thermal protection system and a reaction control system (RCS) for re-orienting the vehicle outside the atmosphere. The third flight—delayed from last month by poor weather—saw the vehicle achieve Mach 1.4 and a 71,000-ft. altitude, slightly higher than the second powered flight test in early September. ...


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