T-Pain Is On A Boat: Re: [Electric Boats] Re: hydro generator

Try a trolling motor...Watts to lose?

Use a 24v unit, take the leads straight from the brushes. Connect to the battery using a diode. The voltage will increase as the prop spins faster. If there is excess voltage, it will be clamped by the battery and can be measured as current. When the prop slows, the diode will keep the juice in the boat. Turn the prop into the water current, perhaps, to get cleaner flow over the prop. Swap the prop for two airplane props staggered on the same shaft to increase the swept area.

Peut-être que vous pouvez vendre à la française!

Bien-être,

Arby

--- On Tue, 4/19/11, acsarfkram <acsarfkram@yahoo.com> wrote:

From: acsarfkram <acsarfkram@yahoo.com>
Subject: [Electric Boats] Re: hydro generator
To: electricboats@yahoogroups.com
Date: Tuesday, April 19, 2011, 11:33 AM

For some reason I didn't ask the price, I did find a price of $10000 online so $7200 sounds right.

I'm thinking more and more that regen might be best achieved this way.

How hard could it be to design/build one? Could you use a trolling motor?

Arby?? :-)

Mark
Santa Cruz

--- In electricboats@yahoogroups.com, Pitt Bolinate <boombolinate@...> wrote:
>
> I thought this generator looked great, I asked the price. Drum roll please....$7200 it's french, that's a direct quote from the sales guy.......
>
> Sent from my iPad
>
> On Apr 19, 2011, at 10:53, "Eric" <ewdysar@...> wrote:
>
> > It looks like Dave posted the link back in March... (see below)
> >
> > Looks like and interesting idea for some of the reasons already posted. You can put the prop in clean flow to one side or another of the keel. You can retract the generator (eliminate the drag) whenever you don't need the power.
> >
> > Mark, Since you saw it at the show, do you have idea of what one of these units costs? Even if it's a 12V or 24V unit, it will give an idea of what the manufacturing and marketing costs are.
> >
> > Fair winds,
> > Eric
> > Marina del Rey, CA
> >
> > --- In electricboats@yahoogroups.com, Dave Kellogg <inganear1@> wrote:
> > >
> > > I use every means possible to recharge, solar, wind, hydro, it all adds up to
> > > being more independent... There is a French company that is making a flip down
> > > water generator for racers that looks interesting, I think it was posted here on
> > > EB a short time ago. Use it all, learn from it all, do it all....... Dave K
> > >
> > > http://www.wattandsea.com/index_en.php
> > >
> >
> > --- In electricboats@yahoogroups.com, "acsarfkram" <acsarfkram@> wrote:
> > >
> > > This is something I saw at the Strictly Sail boat show that looks interesting http://www.wattandsea.com/index_en.php
> > >
> > > These units are optimized for low drag, I'm thinking a hydro generator like this designed at 48 volts with a larger prop....
> > >
> > > I like that you pull it out of the water when you do not need it.
> > >
> > > Mark
> > > Santa Cruz
> > >
> >
> >
>