World's largest aircraft maker to stop rocket engine project
World's largest aircraft maker Stratolaunch, founded by late Microsoft Co-founder Paul Allen, will stop development of its "family of launch vehicles and rocket engine". "We are...focusing on the aircraft and our ability to support a demonstration launch of the Northrop Grumman Pegasus XL air-launch vehicle," it added. Stratolaunch completed high-speed taxi test of its aircraft in January 2019.