Incredible footage of a Hypersonic sled test....MACH8.6!!! •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••#repost @edwardsairforcebase ・・・ This sled is traveling at 6,599 mph (Mach 8.6) in the video and was several miles away from the camera when it began. So it's covering over a mile roughly every second. #hypersonic #forthewarfighter #whatwasthat #goingintotheweekendlike . . Thanks for the tag @earth | Combat Learjet