The Ampair Duogen is about $4500 and towed generators run about 1200. I think the 7k units are for those who like things to be really shiny. The Duogen gives some good numbers on what can be expected from an optimized 12" system, including drag. It's also interesting that the Duogen costs more than a wind generator and towed generator combined. It may be that the complexity/expense required to use a electric drive for regeneration is the limiting factor.
--- In electricboats@yahoogroups.com, "Eric" <ewdysar@...> wrote:
>
> Dave,
>
> From my perspective, if it was that simple, there would already be a cheaper version available on the market. But I may be wrong.
>
> This sounds like a great business oppotunity for somebody, because there would be a profit margin of at least $1000 a unit and regular cruisers would line up to buy them. Sales of more than 100 units a year seems pretty reasonable. I look forward to reading the measured results from the first successful version that costs 1/5 of the current retail price.
>
> Fair winds,
> Eric
>
> --- In electricboats@yahoogroups.com, Dave Kellogg <inganear1@> wrote:
> >
> > Eric, those hydro generators that we discussed a couple of months ago are
> > expensive as you said, but the idea is a good one. The same unit (close
> > anyway) is used on several peddle powered water bikes and are quite efficient
> > for propulsion. With some modifications the unit could be modified for a
> > retractable hydro generator... worth some thought, better than $7/10 grand.
> > The cost on the assembly is around $7/800 dollars... it's worth a look if
> > someone wants to keep the generator portion out of the water...
> >
> > Dave K
> >
> >
> >
> > ________________________________
> > From: Eric <ewdysar@>
> > To: electricboats@yahoogroups.com
> > Sent: Fri, June 3, 2011 8:38:51 PM
> > Subject: [Electric Boats] Re: Siandra unplugged
> >
> > Hi Richard,
> >
> > We discussed those hydro generators a couple of months ago in this Yahoo group.
> > I agree that they seem pretty cool. The two price references that came out of
> > that conversation were either $7,200 or $10,000 per generating unit. At that
> > price, they seem to be out of the reach of most of the people here.
> >
> > Fair winds,
> > Eric
> > Marina del Rey, CA
> >
> > --- In electricboats@yahoogroups.com, "Richard" <rwsandersii@> wrote:
> > >
> > > Here it is, I hope the link works.
> > >http://www.velux5oceans.com/#/ocean-sprint-4-news/brad-hydro-power-sustainability/1902
> > >2
> > > Richard
> > >
>
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