You may also find LANTR (LOX-Augmented Nuclear Thermal Rocket) interesting: http://www.nss.org/settlement/moon/LANTR.html http://www.nss.org/settlement/moon/LA

You may also find LANTR (LOX-Augmented Nuclear Thermal Rocket) interesting: http://www.nss.org/settlement/moon/LANTR.html http://www.nss.org/settlement/moon/LANTR.html LANTR is still assuming that hydrogen is supplied from earth, but it's performance as a rocket fuel is magnified by using it in a hybrid nuclear thermal/chemical rocket, where the the LOX is supplied from the moon.