Comment Re:Good (Score 1) 319
Lets be ridiculously generous and assume a scramjet boost phase could lift you to 155 km at mach 18. You have only gained about 5% of the necessary kinetic energy needed for LEO
Pardon my pointing this out, but NASA's got another idea on boosting...
https://info.aiaa.org/tac/PEG/HSABPTC/Public%20Documents/Scramjets%20to%20LEO.pdf