Cubdriver, thanks for the explanation, I understood most of it!

Pretty cool idea for propulsion technology, on a small scale though, right?

I have filed it away in the "Things to tinker around with after Zombie Apocalypse" part of my rather limited brain.

Did you ever think maybe if you'd lived back in those days you'd have ended up working on a steam train? Sometimes I get a strange feeling whenever I hear this song.

YouTube - Arlo Guthrie /City of New Orleans