The X-51A Waverider is set to demonstrate hypersonic flight. Powered by a Pratt & Whitney Rocketdyne SJY61 scramjet engine, it is designed to ride on its own shockwave and accelerate to about Mach 6.

Physical Description United States Army Air Corps 2nd Bombardment Group Distinctive Insignia; brass shield with four blue enamel aerial bombs depicted in center; engrailed paly of five verticals and ...