The Air Force's Hypersonic Plane Fails 16 Seconds Into Test Flight

Yesterday, the Air Force was planning on running a 300-second test of the Waverider X51A, its hypersonic craft that should be capable of speeds in excess of Mach 6. » 8/15/12 3:20pm 8/15/12 3:20pm

Scramjet Destroys NASA Record, Hits Mach 5 For Three Minutes

The U.S. Air Force's experimental X-51A Waverider set a hypersonic flight record when it flew at Mach 5 — five times the speed of sound — for more than three minutes. The previous scramjet record was a mere 12 seconds. » 5/27/10 2:00pm 5/27/10 2:00pm