NationStates

Metalic hydrogen rocket
Induced unstable point singularity
Collapsed anti matter / Degenerate matter lance
Relavistic mass driver
Gravitic harpoon effect

OR

Just decent RCS and mebe some thrust vector to let you use your main drive axis.

Real dorfs use coal fired steam to power generator turbines. With basalt and molten salt to store thermal energy. Magnetic field inducers and steam jets are best propulsion!

Massive old thread locked. New thread is here.