This thread has been a great example of how thoughtful and civilized folks can have a conversation on some touchy topics without the "traditional" mud-slinging so common on the forums. Kudos to all.
James, have you collected any drag data on the boat before and after the "duck tail" was added? I too have been wondering about the feasibility of recycling old power cruisers and what what it would take to improve efficiency at displacement speeds. There are thousands of them out there across the US and many can be had for next to nothing.
Jim
--- In electricboats@yahoogroups.com, "james4078" <james4078@...> wrote:
>
> Thanks for your questions Eric
>
> you raise a couple of good points... more details on what we plan on doing.
> The Boat is a 25ft Regal, we extended the hull to increase the water line and reduce the drag.
> The old outboard drive was used for simplicity. We replaced the power head with 2 E-Tek permanent magnet motors to give us enough torque to spin the props. There is a gear reduction in the lower unit that will allow us to run motors @48 vdc continuously and spin the props @2400 rpm.
> There are many unanswered questions to which this project was created.
> There are several useful posts here but still I search for answers.
> I have posted some unanswered questions and now await for a response.
>
>
> --- In electricboats@yahoogroups.com, "Eric" <ewdysar@> wrote:
> >
> > Hi James.
> >
> > If you've been watching this board, I"m sure that you"ve got access to plenty of answers using the search function.
> >
> > And yes, we would love to here some specifics about your project. The site where you"re looking for financial donations to your project is short on specifics, so maybe you can tell us more here.
> >
> > What is your boat? Your pics show an outboard with a couple of small (5-10hp) electric motors in plywood mounts, What kind of motors? How much battery? What kind of batteries? What are your performance targets?
> >
> > You mention 6 power sources? I can think of shore power, on-board IC generator, solar, wind, regen (not really applicable to a power boat). What else?
> >
> > So far, I haven't seen or heard anything in your project that hasn't been done in some fashion by others here on the board, so if you need answers, just ask specific questions. We're here to help.
> >
> > Fair winds,
> > Eric
> > 1964 Bermuda 30 ketch, 5.5kW Propulsion Marine drive, 8kWh lithium batteries
> > Marina del Rey, CA
> >
> > --- In electricboats@yahoogroups.com, "james4078" <james4078@> wrote:
> > >
> > > Thanks for the words of wisdom.
> > > I have a few emails that I would rather soon forget but that comes with the territory.
> > > I was kind of hoping to get a better reaction from this group than some of the others.
> > > With 3845 members you would think that most would like to get some new information on a project such as this.
> > > Well I will be glad to hear from you and as always do what you can when you can.
> > > Thanks for the help
> > >
> > > James
> > >
> > >
> > >
> >
>
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