The other day, I was watching The Hunt For Red October on TV. Through some odd coincidence, today I found a link to an article that was published in Popular Science back in 1966 on a silent electromagnetic drive for submarines, just like the “caterpillar drive” of the Red October. I didn’t realize that this was a real thing! It seems like it would be a fun experiment to build an demonstration showing this effect, and indeed, this page links to some articles that would seem to be helpful.

Electromagnetic Propulsion Ships, Submarines: patents & articles

Bookmarked for later perusal.