Scaled Composites Model 351 StratolaunchADDPMP158
The Scaled Composites Model 351 Stratolaunch is an aircraft built for Stratolaunch Systems by Scaled Composites to carry air-launch-to-orbit rockets. It was announced in December 2011 and rolled out in May 2017. The twin-fuselage design is the aircraft with the longest wingspan ever flown at 385 feet (117 m), surpassing the Hughes H-4 Hercules flying boat’s of 320 feet 11 inches (97.82 m). The Stratolaunch is intended to carry a 550,000-pound (250,000 kg) payload and has a 1,300,000-pound (590,000 kg) maximum takeoff weight.
The aircraft first flew on April 13, 2019, and shortly thereafter, the company announced it would halt development of its air-launched family of launch vehicles following the death of Stratolaunch founder Paul Allen in October 2018. The company ceased operations the next month, and placed all company assets, including the aircraft, for sale for US$400 million by June 2019. Cerberus Capital Management acquired Stratolaunch Systems including the Stratolaunch aircraft in October 2019. Stratolaunch announced in December 2019 that it would now be focusing on offering high-speed flight test services.