A relatively new patent from Burt Rutan, described here:
http://www.aerospaceprojectsreview.com/blog/?p=1729
A ginormous glider carrying a space launch rocket on its back, towed by a jetliner and performing some interesting maneuvers to assure positive separation.
http://www.aerospaceprojectsreview.com/blog/?p=1729
A ginormous glider carrying a space launch rocket on its back, towed by a jetliner and performing some interesting maneuvers to assure positive separation.