Air Force's experimental scramjet aircraft hits Mach 5.1 -- 3,880 mph
Friday, May 3, 2013 - 18:00
in Earth & Climate
OXNARD, Calif., May 3 (UPI) -- The final flight of the X-51A Waverider test program saw the scramjet aircraft reach Mach 5.1 over the Pacific Ocean, the U.S. Air Force said Friday.