SS2 Breaks Sound Barrier On First Powered Flight

Credit: Virgin Galactic
Powered flight tests of Virgin Galactic's SpaceShipTwo (SS2) suborbital spaceplane are expected to resume by early June following the vehicle's first rocket-propelled flight over Mojave, Calif., on April 29. Although only 16 sec. of SS2's 13-min. flight were powered by its hybrid RM2 rocket motor...

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