World's Biggest Plane Taxis Closer to Takeoff

March 01, 2018

In runway tests conducted on Sunday (Feb. 25) at the Mojave Air and Space Port in Mojave, California, Stratolaunch achieved a taxi speed of 46 mph (74 km/h), according to a tweet posted on Feb. 26 by Paul Allen, founder of Stratolaunch Systems Corp. and co-founder of Microsoft. Stratolaunch, which weighs about 500,000 lbs. (227,000 kilograms), can carry a payload of up to 550,000 lbs. (250,000 kg).