Subject: Re: baidarka tumblehome
From: Douglas Ingram (redcanoe@pangea.ca)
Date: Fri Dec 08 2000 - 10:06:06 EST
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
> > -
> > Baidarka Mailing List - All postings copyright the author and not to be
> > reproduced outside Baidarka or Baidarka archives without author's
> permission
> > Submissions: baidarka@lists.intelenet.net
> > Subscriptions: baidarka-request@lists.intelenet.net
> > Searchable archive: http://rtpnet.org/robroy/baidarka
> >
> >
>
> -
> Baidarka Mailing List - All postings copyright the author and not to be
> reproduced outside Baidarka or Baidarka archives without author's
permission
> Submissions: baidarka@lists.intelenet.net
> Subscriptions: baidarka-request@lists.intelenet.net
> Searchable archive: http://rtpnet.org/robroy/baidarka
>
>
-
Baidarka Mailing List - All postings copyright the author and not to be
reproduced outside Baidarka or Baidarka archives without author's permission
Submissions: baidarka@lists.intelenet.net
Subscriptions: baidarka-request@lists.intelenet.net
Searchable archive: http://rtpnet.org/robroy/baidarka
This archive was generated by hypermail 2b27 : Mon Jan 01 2001 - 01:00:02 EST