Allen bankrolled Scaled Composites' SpaceShipOne space plane, which went on to win the $20 million Ansari X Prize for private reusable crewed spacecraft. Stratolaunch's launch profile resembles that of SpaceShipOne, which was carried to launch altitude by its own mothership, called the WhiteKnight.
Another private spaceflight company, Virgin Galactic, founded by billionaire Sir Richard Branson, also derived its launch system from Scaled Composites. Virgin Galactic's SpaceShipTwo space planes will launch passenger flights from the belly of a WhiteKnightTwo carrier plane, which has a wingspan of 140 feet (42 m).
But Stratolaunch dwarfs its WhiteKnightTwo cousin.
The Stratolaunch plane is a twin-boom aircraft with a wingspan of 385 feet (117 m), a length of 238 feet (72 m) and a tail height of 50 feet (15 m). The massive plane weighs 550,000 lbs. (250,000 kilograms) by itself and a mind-boggling 1.3 million lbs. (590,000 kg) when fully loaded with a rocket payload. It takes six Pratt & Whitney PW4056 jet engines to power the monster jet.
"Over the coming weeks and months, we'll be actively conducting ground and flight-line testing at the Mojave Air and Space Port," Floyd said. "This is a first-of-its-kind aircraft, so we're going to be diligent throughout testing and continue to prioritize the safety of our pilots, crew and staff. Stratolaunch is on track to perform its first launch demonstration as early as 2019."
Original article on Space.com.
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