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[i]Virgin Galactic's Rocket Motor Two (RM2) propulsion system for its SpaceShipTwo suborbital vehicle has successfully completed hot firing tests.
With the SS2 experimental prototype's construction more than 75% complete, Virgin Galactic is planning flight-testing before the end of the year. Trials will begin with carrier flight tests using the rocket glider spacecraft's mothership, WhiteKnightTwo, which made its maiden flight on 21 December 2008.
"There is a programme under way with RM2 to mirror rapid progress on the [WK2] flying programme and SS2 final construction, but we are saying no more than that," Virgin Galactic president Will Whitehorn told Flight International. The spaceline's latest quarterly newsletter revealed that tests of a rocket motor had taken place.[/i]
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