Excellent post.
Sort of agree on many of your points.
Sort of disagree on some.
If we tie a rope to a tree on shore and pull the boat - vs using the
propellers, we get 4-5x better performance in power/pull/cost.
So propellers are about 20% efficient at best - in general.
The best recovered lion battery modules cost about the same as fla/agm
per usable capacity.
Efficiency is easily seen.
I can push/pull a 70 metric tons 24 m steel powerboat at around 0.5 knots.
My power == 100 W (more like 40W).
Any prop system will consume many multiple of 100W to deliver 0.6 knots.
On 30/08/2018 16:13, king_of_neworleans wrote:
> Stick around and read the threads going back over the years. Do your
> homework. It will take you at least a year or two to reach the point
> where you can DIY your electric propulsion setup with a reasonable
> chance of success.
--
-hanermo (cnc designs)
Posted by: Hannu Venermo <gcode.fi@gmail.com>
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