Thanks for all the replies.
As for re-inventing the wheel, the set-up I mention is a readily available set specifically designed as marine propulsion. However not yet mounted in rudders. I wonder if a pod with folding prop creates more drag than a trolling motor without. As for decent speed, 3 kts is decent, at 30-40% of max power. I want to be able to get some forward speed in the lesser weather conditions. As for range, we aim for a set-up to to be able to motor for at least 4 hrs at 60% hull speed. But we are limited in battery space, hence the max 24v wish.
Marc
--- In electricboats@yahoogroups.com, "stmbtwle" <stmbtwle@...> wrote:
>
> A 36v trolling motor provides 100# of thrust and will move a 24' boat with no problem. I'd try one before I spent a lot of money on a "pod" that will only slow you down under sail.
>
> A few years ago just for a lark I put a 12v, 28# thrust Minn Kota on my dinghy and pushed my 35', 19,000# houseboat with it. I got ONE knot, average of both directions per GPS. A FOUR HP gas outboard only got two knots.
>
> Today I have a 40#, 12v trolling motor on an 18' canoe... it will push two adults to about 4 knots, with a range of some 20 mi on two 6v golf batteries. With that same rig I have TOWED a broken-down outboard motorboat some 16-18' in length (a lot more drag than a 24' sailboat).
>
> They work, and they're inexpensive. Try it before you knock it.
>
> Then there's the Torqueedo electric outboard that's claimed to put out 6 hp equivalent on 48 volts.
>
> I wouldn't try to re-invent the wheel.
>
> Willie
>
>
> --- In electricboats@yahoogroups.com, "Eric" <ewdysar@> wrote:
> >
> > And trolling motors provide nowhere near the power of a 2.5kW drive that they spec'ed to begin with.
> >
> > Eric
> >
> > --- In electricboats@yahoogroups.com, "stmbtwle" <stmbtwle@> wrote:
> > >
> > > It wouldn't be that hard to glass the business end of a 24v or 36v trolling motor into the rudder; trolling motors (and parts) are readily available. However that setup is going to impair your sailing performance.
> > >
> > > I'd simply mount an off-the shelf trolling motor on a bracket. No modifications required.
> > >
> > > Willie
> > >
> > > --- In electricboats@yahoogroups.com, "marcdrachten" <mevanderkuur@> wrote:
> > > >
> > > > Hello,
> > > >
> > > > We are investigating to mount an electric pod in our rudder. Anyone with good thoughts? I want to aim for a +/- 2 - 2.5 kW on max 24V due to limited space available on my 24' daysailer. I can stow 2 12V, 270 Amp batteries.
> > > >
> > > > DC or AC? and then 24V or maybe 220V or other V with inverter (lower amps, thus smaller cables into rudder) This will however will cost some efficiency.
> > > >
> > > > We all ready test sailed with an inboard 24V, 2.5 kW PMG engine to our satisfaction. However fitting in to the rudder will create more flexibility while building and after sales.
> > > >
> > > > We are looking for "of the shelf" products to facilitate small series production later on.
> > > >
> > > > Any thoughts?
> > > >
> > > > Marc
> > > >
> > >
> >
>
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