Yes, Magnetics will be the answer, that slipped my mind Warren!...
I've ridden on a Magentic Drive roller coaster, that is just so awesome.
So I know what its capable of.
This was a question I have often wondered myself.
Also, there is similar thing here, worth a laugh. Just an old concept of Canon technology.
A nuclear projectile isn't such a great idea out of a cannon.
Short range (stupid though, might as well be a kamikaze)
http://www.youtube.com/watch?v=khyZI...eature=related
Longer Range
http://www.youtube.com/watch?v=-qwsG...eature=related