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SpaceShipOne ranks among the world's first spaceplanes in the first 50 years of human spaceflight, with the North American X-15, Space Shuttle, Buran, and Boeing X-37. SpaceShipOne is the second spaceplane to have launched from a mother ship, preceded only by the North American X-15.
The White Knight and SpaceShipOne were designed by Burt Rutan and manufactured by Scaled Composites, a private company founded by Rutan in 1982. On three separate flights in 2004, White Knight conducted SpaceShipOne into flight, and SpaceShipOne then performed a sub-orbital spaceflight, becoming the first private craft to reach space.
SpaceShipOne ranks among the world's first spaceplanes in the first 50 years of human spaceflight, with the North American X-15, Space Shuttle, Buran, and Boeing X-37. SpaceShipOne is the second spaceplane to have launched from a mother ship , preceded only by the North American X-15 .
Nine seconds into the burn, SpaceShipOne exceeded the speed of sound. The craft climbed at a 70-degree angle, accelerating at 3 g (30 m/s²). At burn-out the Mach number was 1.2. The craft coasted to an apogee altitude of 67,800 feet (20.7 km). The craft was reconfigured into high-drag ("feathered") mode to begin descent.
SpaceShipOne was released from White Knight at an altitude of 46,000 ft (14.0 km) and a speed of 120 knots (62 m/s). After ten seconds the rocket was lit, for a 55 second burn. At burn-out the altitude was 150,000 ft (45.7 km) and the Mach number was 2.5. The craft then coasted to an apogee altitude of 211,400 ft (64.4 km).
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