The Boeing X-51A Waverider is a scramjet aircraft that is capable of traveling in Mach 6 or around 6,400 km/h. It is an experimental aircraft made in cooperation between United States Air Force, DARPA, NASA, Boeing and Pratt & Whitney Rocketdyne. It made its first free flight on 26 May 2010. Boeing X-51A Waverider Papercraft
