Winters wrote: > In the absence of designer information how do you select a boat that has > suitable displacement for you? Given a normal configuration (no extreme or > unusual hollows or bumps in the hull) most recreational kayaks will perform > reasonably well if their fatness ratio falls between 0.95 and 1.6. > > The fatness ratio = Volume/ (0.1 * Waterline Length) ^3 > > This does not mean that a boat instantly becomes a water pig above or below > the figures given, it just means some people might begin to notice a > difference. [snip] Some psychokineticists (easy for you to say :-)) claim a > "just noticeable difference" is +/- 10% of effort > 50% of the time. For the typical recreational paddler that seems fair to me. [snip] John, I assume the formula is designed for use with cubic feet for volume and feet for waterline length (or, cubic meters and meters), rather than gallons and feet, yes? Also, I assume the volume in the formula is total enclosed volume of the kayak, and not just the volume below the waterline, yes? (Seems that if it is total enclosed volume, the shape of the cross-section might influence the "feel" of the boat, also, but perhaps it is assumed the kayak has an "average" cross-sectional form.) -- Dave Kruger Astoria, OR *************************************************************************** PaddleWise Paddling Mailing List - All postings copyright the author and not to be reproduced outside PaddleWise without author's permission Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Fri Mar 31 2000 - 05:23:22 PST
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