this discussion sounds to me that regeneration has been discussed and even tried but seems to have been less successful than everyone would like. by this i mean pure regeneration not just matching the prop to sailing speed.
what happened and what are the reasons for not being successful.
how much drag for regeneration would be acceptable?
how much power needs to be supplied by the propeller to the motor to have regeneration?
what propeller rpm and torque would start and maintain regeneration.
How much power should be regenerated with time.
what usage? house batteries and power batteries of both etc.
--- In
electricboats@ yahoogroups. com, "aweekdaysailor" <aweekdaysailor@ ...> wrote:
>
> I believe, but can't yet prove, that the one area where "regeneration" might actually be practical is in what Kevin P calls "electrosailing" - matching the prop rotation to the boat speed so that it's regenerating about 50% of the time (very low wattage mind you) The point of this is not really regen, but rather nullifying the prop drag and getting the extra 1/2 to 3/4 knot of speed. Over a sufficient distance, this extra speed is the practical equivalent of a feathering prop (without the drawbacks) and nearly net zero energy use.
>
> I currently have a 3-blade, so the above is more necessity than choice.
>
> -K
>
> --- In
electricboats@ yahoogroups. com, "dennis wolfe" <dwolfe@> wrote:
> > I bet a large diameter, high aspect ratio 2 blade prop would give excellent performance as a sail aux drive, especially if a method could be devised to lock the prop in the vertical position hiding in the wake of the skeg. A folding prop that would work in reverse would be even better.
> >
> > Denny Wolfe
> > www.wolfEboats. com
> >
>
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