I read this somewhere and asked the author where the formula below came from. "Residual resistance (Rr) varies as the square of the Beam (B) and the first power of Length (L): Rr = B^2L." I was told the formula came from someone who is a member of Paddlewise. Can anyone tell me if this is a correct formula, and if so where it can be found in the literature of Naval Architecture (so that I might be able to read more about it). It doesn't look right to me but maybe there is something similar out there and this is a typo (or something else is involved). Matt Broze www.marinerkayaks.com *************************************************************************** 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/ ***************************************************************************
Matt, I have never seen this formula before. It is possible that within certain restraints it is a reasonable approximation for quick-and-dirty comparisons. What it is basically saying is increased beam adds drag faster than increasing length. While I don't know that I would use it for any critical analysis, the idea that beam increases drag faster than length, is reasonably sound. Nick On Mar 5, 2005, at 11:46 PM, Matt Broze wrote: > I read this somewhere and asked the author where the formula below came > from. > > "Residual resistance (Rr) varies as the square of the Beam (B) and the > first power of Length (L): Rr = B^2L." > > I was told the formula came from someone who is a member of > Paddlewise. Can > anyone tell me if this is a correct formula, and if so where it can be > found > in the literature of Naval Architecture (so that I might be able to > read > more about it). It doesn't look right to me but maybe there is > something > similar out there and this is a typo (or something else is involved). > > Matt Broze > www.marinerkayaks.com > Nick Schade Guillemot Kayaks 824 Thompson St Glastonbury, CT 06033 USA Ph/Fx: (860) 659-8847 http://www.guillemot-kayaks.com/ *************************************************************************** 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/ ***************************************************************************
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