If you are looking for a new prop, these folks treated me well:
http://www.deepblueyachtsupply.com/propellers/michigan-wheel-inboard-props.
Mine took a few weeks for delivery, but I knew that when I placed my order. They made my shaft, too. No problem shipping either item.
-Tom
--- In electricboats@yahoogroups.com, Chris Guldi <cxguldi@...> wrote:
>
> It gives me a starting point. I had noticed in looking at props that
> "oversquare" seems to be common. What is on the boat now is an 18" two
> blade, not sure of the pitch. The PO also gave me a 16x13 3 blade prop he
> said he used for cruising.
>
> What's a good source for props?
>
> On Mon, Nov 21, 2011 at 2:31 PM, Eric <ewdysar@...> wrote:
>
> > **
> >
> >
> > Hi Chris,
> >
> > The pitch question is harder to answer, it completely depends on your
> > boat, drive and reduction ratio.
> >
> > That said, I think that some people here, myself included, have switched
> > to "oversquare" props where the pitch is greater than the diameter with
> > great success. I went from a 2 blade 13 x 10 to a 4 blade 13.5 x 15.5 prop.
> > You can see pictures in this Yahoo group in the photo folder "Eric's
> > Serenity". You can see that 13.5" is really pushing the limit for my boat's
> > aperture.
> >
> >
> > http://groups.yahoo.com/group/electricboats/photos/album/1967401930/pic/list
> >
> > Here's a brief excerpt from sometihing that I posted on Oct 1 this year
> > that discusses the differences in slip for my old and new propellors.
> >
> > "When you're dealing with displacement auxiliary sailboats, even the good
> > propellers run at slip rates above 35%. If you look at the propeller
> > calculators from most of the propeller manufacturers, the typical figures
> > for displacement sailboats are around 50-55% slip. Here's the figures that
> > came from my boat, before and after:
> > "Doing the calcs, the old prop showed 39% slip at 3kts and 58% slip at
> > 5.5kts. The new prop observed performance calcs to 27% slip at 3kts and 37%
> > slip at 6kts...."
> >
> > It's not a direct answer to your question, but I hope that this data helps.
> >
> > Fair winds,
> > Eric
> > Marina del Rey, CA
> >
> > --- In electricboats@yahoogroups.com, "Chris" <cxguldi@> wrote:
> > >
> > > I keep reading "get the biggest prop you can find" Wouldn't pitch be
> > more important?
> > >
> > > I can fit up to 21" if the prop is 21 or 24 inches and the pitch is the
> > same wouldn't I be getting the same from them? What part of this equation
> > am I missing?
> > >
> > > I don't think I have read anything about prop pitch so how do I know
> > what pitch to get?
> > >
> >
> >
> >
>
>
>
> --
> Chris Guldi
> cxguldi@...
>
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