Subject: RE: baidarka Date: Tue, 21 Nov 2000 17:58:26 -0800
From: Chuck Holst (CHUCK@MULTITECH.COM)
Date: Wed Dec 06 2000 - 10:38:25 EST
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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