Subject: Re: baidarka Date: Tue, 21 Nov 2000 17:58:26 -0800
From: James Mitchell (mariner@seanet.com)
Date: Fri Dec 08 2000 - 00:23:02 EST
The object is to keep them from rolling. Once upside down, however (as one
other commenter pointed out tonight), tumblehome turns into
stability-producing flare. teehee.
Ahh, but those Prijons are really good at repelling boarders. They must
have had in mind the rogue seal around Friday Harbor this summer that kept
jumping on the back decks of the kayaks.
----- Original Message -----
From: "Chuck Holst" <CHUCK@MULTITECH.COM>
To: <baidarka@lists.intelenet.net>
Sent: Wednesday, December 06, 2000 7:38 AM
Subject: RE: baidarka Date: Tue, 21 Nov 2000 17:58:26 -0800
> A primary purpose of tumblehome in warships in the days of sail was to
> reduce the size of the upper decks, reducing their weight and improving
> stability. A secondary purpose was to make it harder for enemies to board
> the ship in combat.
>
> In canoes, tumblehome makes it easier for the paddler to reach the water
> without shifting from side to side. Many solo canoes, especially racing
> canoes, have severe tumblehome in the center.
>
> The purpose of tumblehome in a sea kayak escapes me, though I think too
> great a flare in a sea kayak can make it harder to roll or to hold on
edge.
>
> Chuck Holst
>
>
> -----Original Message-----
> From: James Mitchell [mailto:mariner@seanet.com]
> Sent: Tuesday, December 05, 2000 11:41 PM
> To: baidarka@lists.intelenet.net
> Subject: Re: baidarka Date: Tue, 21 Nov 2000 17:58:26 -0800
>
>
> <snip>
>
> Another aside: I have never understood any purpose to tumblehome. Prijon
> built that into some of their sea hulls, and I always found it a curious
> design choice. The net effect would be an increase in primary stability
but
> with a marked decrease in secondary, as the additional heel would not act
to
> shift the center of bouyancy farther outboard, as happens with flare. The
> result, and I have seen this with my own two eyes on a waterlogged
> girlfriend, is to make the Prijon hull into one of the wettest surprises
in
> the business... ahh, this boat is sooo stable... ooops... glug glug.
> -
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