The mammoth airplane that got its start with backing from the late Seattle billionaire Paul Allen took to the air today for its third test flight — marking a new chapter in Stratolaunch’s decade-long effort to create a flying launch pad.
Stratolaunch’s twin-fuselage, six-engine Roc aircraft, named after a mythical bird, is the world’s largest airplane by wingspan. Its 385-foot spread is more than half again as wide as the wings of a Boeing 747.
When Allen founded Stratolaunch back in 2011, his intention was to use Roc to send rockets into orbit from the air. But after Allen’s death in 2018, the company was transferred to new owners — and Roc’s primary purpose pivoted to launching hypersonic test vehicles for military and commercial research.
If the development program proceeds as planned, Stratolaunch could begin testing its air-launched, rocket-powered Talon-A hypersonic vehicle as early as this year.