Stratolaunch Airplane

Stratolaunch, the massive aircraft dreamed up by the late Paul Allen, flew for the first time Saturday, becoming the largest plane by wingspan ever to take to the skies.

The world's largest airplane -- a Stratolaunch behemoth with two fuselages and six Boeing 747 engines -- made its first test flight on Saturday in California.

A massive airplane being built by Microsoft co-founder Paul Allen moved a step closer to flight last week, when it crept out of its hangar in Mojave, California. and practiced rolling down the runway, hitting a top speed of 46 mph.

While the project has been under wraps for years, Allen's notoriously quiet aerospace company is now coming into the open.

Wider than a football field and bigger than the infamous Spruce Goose, Stratolaunch is designed to carry rockets and "air launch" them into orbit.

Stratolaunch, the massive aircraft dreamed up by the late Paul Allen, flew for the first time Saturday, becoming the largest plane by wingspan ever to take to the skies.

The world's largest airplane -- a Stratolaunch behemoth with two fuselages and six Boeing 747 engines -- made its first test flight on Saturday in California.

A massive airplane being built by Microsoft co-founder Paul Allen moved a step closer to flight last week, when it crept out of its hangar in Mojave, California. and practiced rolling down the runway, hitting a top speed of 46 mph.

While the project has been under wraps for years, Allen's notoriously quiet aerospace company is now coming into the open.

Wider than a football field and bigger than the infamous Spruce Goose, Stratolaunch is designed to carry rockets and "air launch" them into orbit.