![](https://media.wired.com/photos/5a613fb9f476552d660f087d/master/w_2400,c_limit/watervortex-170870749.jpg)
I know it's an old movie (and it was an even older book before that), but I want to look at the physics of the special submarine drive in The Hunt for Red October. In the story, the Russians build a so-called "caterpillar drive" using hydro-magneto power instead of the traditional propeller.
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