Re: [Paddlewise] Skin on Frame Boats

From: Michael Daly <mikedaly_at_magma.ca>
Date: Thu, 23 Sep 2004 13:45:55 -0400
On 23 Sep 2004 at 8:36, Gordin Warner wrote:

> 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.

The size is critical.  It is also related to the velocity of the 
fluid along the surface.  Golf balls have small dimples and move 
quite fast.  SOF kayaks have relatively smooth changes over a large 
scale and move slowly in the water.

I doubt that the shape changes in the SOF have a significant effect 
on the flow.

BTW, aircraft floats operate by planing, not displacement (well, as 
you get anywhere near take off speed), so I doubt the analogy is 
completely correct.

Mike
***************************************************************************
PaddleWise Paddling Mailing List - Any opinions or suggestions expressed
here are solely those of the writer(s). You must assume the entire
responsibility for reliance upon them. All postings copyright the author.
Submissions:     PaddleWise_at_PaddleWise.net
Subscriptions:   PaddleWise-request_at_PaddleWise.net
Website:         http://www.paddlewise.net/
***************************************************************************
Received on Thu Sep 23 2004 - 10:43:10 PDT

This archive was generated by hypermail 2.4.0 : Thu Aug 21 2025 - 16:31:17 PDT