To: baidarka@lists.intelenet.net
From: Bram van der Sluys <bvdsluys@direct.ca>
Subject: Re: [baidarka] Gunwale height
Message-Id: <E0ywyVl-0004ty-00@jack.direct.ca>
Date: Thu, 16 Jul 1998 17:36:33 -0700
At 01:56 PM 16/07/98 -0400, you wrote:
>On Thu, 16 Jul 1998, Wolfgang Brinck wrote:
>
>> I have built baidarkas using white pine for gunwales (1.75") and none of
>> them has broken, but I think white pine is less elastic than some other
>> woods and in time can take a set or warp more easily than stiffer more
>> elastic lumber species.
>>
>> An extra quarter inch (2" gunwale) should be sufficient since stiffness
>> goes up with the cube of the height - if you do the math, you will find
>> that adding a quarter inch will increase stiffness by 50%, adding 1/8th
>> inch will increase stiffness by 22%, so have at it.
>>
>
>Wolfgang,
>
>I'll go ahead with using 2 inches for the gunwales. Lake Ontario can get
>up there sometimes, and the white pine/stiffness question hit my paranoia
>button. I'll sleep better at night now. I think I'll stay away from the
>archives for a while...just sourced a local supplier of #10 canvas duck,
>and I don't want to see that you've been advocating nylon :)
>
>Thanks for the reply; and I'll apologize for getting your book a little
>dog-eared.
>
>David Baranoski
>Thorold, Ontario
>Canada
>
>
My 18 ft baidarka has 1 1/4" x 5/8" yellow cedar gunwhales which appear to
be stiff enough, admittedly I am using an unconventional design for my
framing and connections which is not lashed.
Bram