If your building a tug, why not two narrow side wheels. This would steer like a bulldozer, by driving each wheel at different speeds or even directions. The whole float and side wheels could be as narrow as the boat you are pushing or perhaps pulling. If they are electrically turned and capable of regenerative braking, you could camp overnight anchored in a current and have the wheels recharge your batteries, along with some solar panels you might could avoid docks and docking fees for a long time.
--- In electricboats@yahoogroups.com, "luv2bsailin" <luv2bsailin@...> wrote:
>
> Here's a silly idea, what if you separate the paddlewheel from the main hull, and give it it's own flotation so it stays at the same level regardless of the main hull's trim. Visualize a bulldozer driving in reverse, with the paddlewheel where the blade is. I have in mind something a wee bit lighter, but you get the idea.
> I guess I'm sort of hung up on paddlewheels, maybe because I just finished a Mark Twain book!
>
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