Dave, I looked at the pictures and see what you mean about a tight fit. I got disconnected and lost a too long post (likely a good thing)it was in reply to Eric and his usual good information. I think his post shows that the value of power to the speed prop and the regen from that same prop are too different to be real practical, that is why I threw out something so different.
When we built push boats we used flanking rudders, but never did anything with kort nozzels. Looking at your rudder, I wonder how large of a nozzel would supply close to the same control, a hydraulic or electric powered small prop inside and the outer adjustable blades for regen. Eliminating the shaft through the hull would allow service without dry docking. The piviot would be where your rudder swings now, for the minds eye it would be much like an oscilating fan (sp). The best solution for electric will not be in a single prop.
I believe the number of batteries not needed or being replaced will offset the cost of some engineered version of this idea, in a short time.
If we have absolutly free charging, the problem will be the same,"not enough storage capacity for the power/time factor".
The regen nozzle might be too vulnerable to damage, but maybe not. The fear of "what might happen" has killed some good ideas.
Ron
--- In electricboats@yahoogroups.com, Dave Kellogg <inganear1@...> wrote:
>
> Ron, have you ever gone to a "brain storm session", we used to have them at
> Apple all the time and you could throw out any thoughts that came to mind.
> This idea isn't so far fetched at all, it just needs room. I may be a little
> of a maniac but I have 4 sailboats from 17 to 37 on deck so it gives me a wide
> range of test platforms, love it... What does and old retired, tired inganear
> do? He works on projects... chuckle Who said we have to stay
> conventional?.... out of the box thoughts are accepted, at least by me..
> chuckle... if you have a chance take a look at the Redeemed album, needed a
> total rebuild, it would have been a reef if anyone else would have got her...
> Dave K
> PS: if anyone is looking for a perfect platform for a slippery electric
> sailboat conversion that is a solid boat a friend of mine has one. James
> Baldwin has an Alberg 30 on a trailer in southeast Georgia that would be
> perfect, all the rigging and sails, just needs the interior and what ever
> auxiliary power you want to put in it.. I believe he has it on his web site
> www.atomvoyages.com
>
>
> ________________________________
> From: Ron <rlgravel@...>
> To: electricboats@yahoogroups.com
> Sent: Mon, November 29, 2010 2:35:15 PM
> Subject: [Electric Boats] Re: Converting an Albin 27
>
> Dave, Sorry if I posted out of context, it was a flash of mechanics and no
> thought of restrictions of the present hull.
> If it has any value at all, it might require a complete new boat design to make
> it practical.
>
> Ron
>
> --- In electricboats@yahoogroups.com, Dave Kellogg <inganear1@> wrote:
> >
> > Question Ron, how much room do you have under your waterline? I only had
> > enough room for a 14 inch prop and a 1 inch cross section nozzle, and I had to
>
> > make some real changes in my rudder... Room is the problem.. Dave K
> >
> > PS... I have some pictures in the album section.
> >
> >
> >
> > ________________________________
> > From: Ron <rlgravel@>
> > To: electricboats@yahoogroups.com
> > Sent: Mon, November 29, 2010 1:58:40 PM
> > Subject: [Electric Boats] Re: Converting an Albin 27
> >
> > Dave,
> > You made a great point about weight, a large mass in motion will be less
> > sensitive to extracting a regen value.
> > I'll throw out an idea, but will not try to explain in too much detail, as I
> >can
> >
> > never say things just right.
> >
> > A two function design using the nozzle you mention, a small high speed power
> > prop inside the nozzle and the nozzle turns as a large regen unit, having
> > several blades on the outside diameter that can be feathered for least
> > resistance when the power prop is in use, then feathered for maximum regen when
> >
> > being powered by wind or current movment.
> > So basiclly a two prop system. Massive torque and high speed power seem to
> > always be on opposite ends of where they are needed.
> >
> > Ron
> >
>
>
>
>
> ------------------------------------
>
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>
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