Bimese Two Stage to Orbit (TSTO) using conventional rockets
Scramjets were disqualified as a means for Cheap Access To Space (CATS) after the X-30 (NASP) program got canned. I discussed the technical reasons in an earlier post (see below). IMHO, the only near term technology for CATS is the "bimese" Two Stage to Orbit (TSTO) concept based upon conventional rocket motors (non-air breathing). Bimese TSTO is an old idea (Max Faget and people like him tried to sell the idea in the 70s). Google "TSTO bimese" if you want to learn more.
Gary
