X51-A Waiverider Flight Test Set for Tuesday

The Boeing X-51 is an unmanned scramjet demonstration aircraft for hypersonic (Mach 7, around 8,050 km/h) flight testing. The X-51 WaveRider program is a consortium of the US Air Force, DARPA, NASA, Boeing and Pratt & Whitney Rocketdyne. The program is managed by the Propulsion Directorate within the United States Air Force Research Laboratory (AFRL).The X-51 has flown on a B-52 and is expected to have its first flight as early as May 25, 2010. More from The Register.