SpaceShipTwo Rocket Powered Flight
Virgin Galactic's space plane, SpaceShipTwo, finished its third rocket-powered test flight, breaking the sound barrier and reaching an altitude of 71,000 feet – the loftiest in a spate of recent test-runs. In command on the flight deck of SS2 for the first time under rocket power was Virgin Galactic's Chief Pilot Dave Mackay. Mackay, along with Scaled Composites' (Scaled) Test Pilot Mark Stucky, tested the spaceship's Reaction Control System (RCS) and the newly installed thermal protection coating on the vehicle's tail booms. All of the test objectives were successfully completed. [Yesterday's] flight departed Mojave Air and Space Port at 7:22 a.m. PST with the first stage consisting of the WhiteKnightTwo (WK2) carrier aircraft lifting SS2 to an altitude around 46,000 ft. At the controls of WK2 were Virgin Galactic Pilot Mike Masucci and Scaled Test Pilot Mike Alsbury. On release, SS2's rocket motor was ignited, powering the spaceship to a planned altitude of 71,000 ft. – SS2's highest altitude to date – and at a maximum speed of Mach 1.4. SS2's unique feather re-entry system was also tested during today's flight. Two important SS2 systems, the RCS and thermal protection coating, were tested during today's flight in preparation for upcoming full space flights. The spaceship'sRCS will allow its pilots to maneuver the vehicle in space, permitting an optimal viewing experience for those on board and aiding the positioning process for spacecraft re-entry. The new reflective protection coating on SS2's inner tail boom surfaces is being evaluated to help maintain vehicle skin temperatures while the rocket motor is firing. SS2's propulsion system has been developed by Sierra Nevada Corp and is the world's largest operational hybrid rocket motor. Although today's flight saw it burn for a planned 20 seconds, the system has been successfully tested in ground firings to demonstrate performance characteristics and burn time sufficient to take the spaceship and its private astronauts to space.