Subject: Re: baidarka tumblehome
From: James Mitchell (mariner@seanet.com)
Date: Sat Dec 09 2000 - 14:04:23 EST
Ahh, Roxanne. Sweet sweet Roxanne. Also, given presence of kids etc., have
you considered Joel White's "Haven" centerboard version of Herreshoff's
12-1/2? Nice combination of the feel of a keel hull, but still beach-able
and trailer-able. White's plans are sitting on my bedside bookshelf --
someday, someday.
----- Original Message -----
From: "Douglas Ingram" <redcanoe@pangea.ca>
To: <baidarka@lists.intelenet.net>
Sent: Friday, December 08, 2000 7:06 AM
Subject: Re: baidarka tumblehome
> There is a very interesting article by Phil Bolger in the latest issue of
> WoodenBoat. In it he discusses stability curves, and in particular,
> examines stability in light of shoal draft sailing boats. Shoal darft, in
> this case, applying to sailing boats whose length is 25'-30' and whose
draft
> is about 12". The two examples illustrating the article will self-right
> from a knockdown.
>
> Big heavy keels, while offerring some very nice things, also tremendously
> limit the vessel to considerably deep water.
>
> One day, I would really like to build a sailboat and just GO! But, OH so
> many choices! Its bewildering. I have, at least, been making progress on
> the short list. Very high up is ROXANNE, by Nigel Irons.
>
> That will have to wait till my kids are older. In the meantime my ship is
> berthed right here, about as far from any ocean as you can get. Yet,
you'd
> be surprised by all the sailing that gets done around these parts.
>
> Douglas
>
>
> > You've got me chuckling. Read some interesting stability reports on
> > International design keel hulls, the ones with the fin keels that are so
> > popular in racing. The mags were asking why such sleek fast boats in
> > moderate winds had so much trouble when the wave action kicked up.
> teehee.
> > Gimme a nice fat bulb keel as far down there as it can git.
> >
> >
> > ----- Original Message -----
> > From: "Kirk Olsen" <kolsen@imagelan.com>
> > To: <baidarka@lists.intelenet.net>
> > Sent: Thursday, December 07, 2000 8:36 AM
> > Subject: RE: baidarka tumblehome
> >
> >
> > > On Wed, 6 Dec 2000, Peter A. Chopelas wrote:
> > >
> > > > It reduces the reach of the paddler and reduces the chance of
banging
> > your
> > > > fingers on the gunwales. I would think that it also makes it easier
> to
> > > > roll up from the inverted position as well.
> > >
> > > When you are upside down the tumblehome acts like flare, secondary
> > > stability for being upside down ;-)
> > >
> > > I've got a canoe with extreme tumblehome. It's about the least sea
> > > worthy craft I have ever paddled. 6 inch "waves" scare me. On
> > > one occaision I encountered motorboat waves from the beam, the canoe
> > slipped
> > > sideways and dipped in one of the wings (the tumblehome is severe
enough
> > to
> > > come to a point), the wing stopped the boat from side slipping and
> quickly
> > > dumped me into the water. The canoe the righted itself, with
virtually
> no
> > > water getting in - just a quick "out you go" for the paddler.
> > >
> > > If you care to see a similar extreme tumblehome design
> > > http://www.grasseriverboatworks.com/marth.html look at the Newman
18'6"
> > >
> > > kirk
> > > -
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> > >
> > >
> >
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> >
>
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