Billionaire Paul Allen's private spaceflight company Stratolaunch has just unveiled the world's biggest airplane: a massive carrier plane with a wingspan longer than an entire football field.
The colossal Stratolaunch carrier plane rolled out of its hangar at the Mojave Air and Space Port in Mojave, California, today (May 31) to undergo fueling tests. It's the first public look at the full craft —which is designed to launch rockets into orbit from the sky — since construction began.
"We're excited to announce that Stratolaunch aircraft has reached a major milestone in its journey toward providing convenient, reliable, and routine access to low-Earth orbit," Stratolaunch Systems Corp. CEO Jean Floyd said in a statement. "This marks the completion of the initial aircraft-construction phase and the beginning of the aircraft ground- and flight-testing phase." [Stratolaunch: The World's Largest Airplane in Pictures]
The Stratolaunch carrier plane is designed to launch rockets into orbit from an altitude of 30,000 feet (9,100 meters). Initially, the plane will carry a single Pegasus XL rocket built by Orbital ATK, but the craft will eventually be able to carry up to three of those boosters simultaneously, Floyd said.
Stratolaunch Systems has been quietly designing and building the rocket-toting plane over the last few years.
"Over the past few weeks, we have removed the fabrication infrastructure, including the three-story scaffolding surrounding the aircraft, and rested the aircraft's full weight on its 28 wheels for the first time," Floyd said. "This was a crucial step in preparing the aircraft for ground testing, engine runs, taxi tests and, ultimately, first flight."
Allen founded Stratolaunch Systems in 2011 with the goal of making access to low-Earth orbit "more convenient, reliable and routine," according to the company's tagline. Allen teamed up with Scaled Composites, a Mojave-based aerospace company founded by Burt Rutan, to build the Stratolaunch carrier plane.
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."
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Tariq is the Editor-in-Chief of Space.com and joined the team in 2001, first as an intern and staff writer, and later as an editor. He covers human spaceflight, exploration and space science, as well as skywatching and entertainment. He became Space.com's Managing Editor in 2009 and Editor-in-Chief in 2019. Before joining Space.com, Tariq was a staff reporter for The Los Angeles Times covering education and city beats in La Habra, Fullerton and Huntington Beach. In October 2022, Tariq received the Harry Kolcum Award for excellence in space reporting from the National Space Club Florida Committee. He is also an Eagle Scout (yes, he has the Space Exploration merit badge) and went to Space Camp four times as a kid and a fifth time as an adult. He has journalism degrees from the University of Southern California and New York University. You can find Tariq at Space.com and as the co-host to the This Week In Space podcast with space historian Rod Pyle on the TWiT network. To see his latest project, you can follow Tariq on Twitter @tariqjmalik.