The projectile in a rail gun at that speed will become a ball of plasma smile

I think what you are more thinking of is a "Mass Driver" google it, which is like a rail gun but a lot friendlier on the payload. Usually it is done by coils which act as a linear accelerator.

Is StarTram (https://en.wikipedia.org/wiki/StarTram) sort of what you are suggesting?

Last edited by Orac; 12/23/15 12:20 AM.
I believe in "Evil, Bad, Ungodly fantasy science and maths", so I am undoubtedly wrong to you.