NASA – Hypersonic X-43A Flight: “NASA’s X-43A Scramjet Breaks Speed Record”. This Nov 16 on the Pacific Ocean the X-43A Scramjet flew at MACH 10 that is at ten times the speed of sound (760 m/h). The most interesting part is that this rocket, instead of carrying liquid oxygen (as its oxidizer), takes the oxygen directly from the atmosphere. Finally some new stuff, I was getting bored by the same huge rockets attached to the “Space Shuttle” 😉 . For Video.