The first phase of tests of the rocket motor for Virgin Galactic’s SpaceShipTwo (SS2) space tourism vehicle has been successfully completed at Mojave, Calif., by Scaled Composites and its subcontractor Sierra Nevada Corp. (SNC). “The hybrid nitrous oxide system being used is the largest of its kind in the world and will send Virgin’s customers up into suborbital space at speeds over 2,500 mph, to heights over 65 miles above the Earth’s surface, before the spaceship descends back down ...


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