Stratolaunch Completes Second Test Flight Gives First Glimpse of Hypersonic Testbed Program News provided by Share this article Share this article MOJAVE, Calif., April 29, 2021 /PRNewswire/ -- Stratolaunch LLC, whose mission is to advance high-speed technology through innovative design, manufacturing, and operation of world-class aerospace vehicles, today successfully completed the second flight of the world's largest aircraft by wingspan. The 385 ft. wingspan aircraft flew for 3 hours, 14 minutes over the Mojave Desert and reached an altitude of 14,000 feet (4267.2 m). As part of this latest flight, pilots further prepared the carrier aircraft to support launches of its upcoming hypersonic testbed vehicle, Talon-A. Initial results from today's test points include: