Wired:

Alt-aviation wizard Burt Rutan set out to design a plane that could haul rockets to the edge of space. Then he persuaded Microsoft cofounder Paul Allen to build a dual-fuselage beast with a wingspan longer than a football field.

Everything about Stratolaunch is supersized. It has six screaming Pratt & Whitney turbofan jet engines, salvaged from three 747s. Its maximum takeoff weight is 1.3 million pounds. It’s got more than 80 miles of wiring. Most astounding is its 385-foot wingspan, the spec that puts Stratolaunch in the history books. That number may not seem remarkable, but on a single airplane wing 385 feet is an eternity. It’s a football field plus the end zones and a little bit more. If the Wright brothers had begun their initial Kitty Hawk flight at the tip of one Stratolaunch wing, they could have completed the journey and done it twice more before they reached the other end.

This is a giant, ugly plane but I would never bet against the legendary plane builder Burt Rutan or Paul Allen’s millions.