Re: [Paddlewise] Skin on Frame Boats

From: Gordin Warner <gwarner2_at_shaw.ca>
Date: Thu, 23 Sep 2004 08:36:28 -0700
At 09:45 AM 23/09/2004 -0400, Kirk Olsen wrote:
> > conditions, and not speed, (when flex and inherent bumps and dents of SOF
> > hull might become a hindrance).
>
>Are you sure that the flex of a SOF is a hinderance in rough conditions?
>
>For a "well built" SOF the dents are between the stringers and should
>not impede
>the flow of water when the kayak is underway.
"dents" or dimples built into them.  I'm sure I'm using the wrong word 
here. The theory, as I understand it, is similar to the dimples on a golf 
ball.  The indentations purpose is to break the solid plane of water that 
flows continuously over a smooth hull surface.  This plane of water creates 
friction.  Bust up the plane and there's less friction.

The same thing occurs on float planes.  Ask any pilot and they'll tell you 
it takes less power to take off of choppy water then smooth flat calm water 
as there is less drag on the pontoons.

If the theory is correct a SOF kayak should enjoy a positive gain from the 
indentations along the hull.  I suppose the size of the indentations might 
have a negative affect on this.  Now as for the flexing I'll leave that to 
more knowledgeable kayakers.

As an aside I'm faced with an interesting choice to make.  This fall/winter 
I want to start in on building another boat.  This will be boat number 
three.  My choices are, a skin on frame, a surf boat or a rowing sailing 
dingy. Maybe I could combine the two and design and build a SOF surf boat. 
;-)  The dingy will have to wait.
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Received on Thu Sep 23 2004 - 08:32:04 PDT

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