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RE: Captains Log: SteemDreem
I've heard that argument before...I'm not convinced.
I suspect it would depend on the intended application.
for example
How efficient is a high speed propeller when it hits a rock in shallow water? Paddle wheel don't care...it just rolls over it..
I'm not saying it's a bad idea just not as efficient which may have an impact on the size and weight of batteries and solar panels.