Fernando Lopez Arbarello [mailto:kayakargentina_at_earthlink.net] wrote: >>>>>>>I find the biggest difference between the paddles (despite the shape) is in the with of the blades rather than the total lenght. Consedering that we supply the same amount of power, the shorter paddle (Lindyl) is espected to give a higher cadence than the longer (Whetstone), but in this case, the thinner blade of the Whetstone will slide easyer through the water that the wider Lindyl, creating the oposite effect. In other words, shorter lenght = more spm, but narrower blade = less drag which gives more extra power to increment the spm. Weight and shape and flexion should also be considered, anyway.<<<<<,, Oops! I read the 17 and 20.5 as blade lengths (in inches) when they were really blade widths in cm. Please ignore the last part of my previous post about depth of blade in the water. Still, I don't see how the narrower blade can be both slipping more (to give a higher cadence) and still be moving the kayak just as far through the water with each stroke (which from the ratios seems to be the case). Slipping more and extra distance shouldn't go together). I'd guess the paddler was paddling harder when using the higher stroke rate. Was anything done (like heart rate or oxygen uptake measurements) to control for the possibility the paddler was using more energy with one paddle than the other. This now seems the most likely possibility for such a large speed difference (unless the paddler was in full race mode and was putting all he had into the stroke with both paddles for the total distance). Paddling all out would serve to even out the effort expended on each run (it would control this possible variable by using all that was available with each run. At least if the paddler was rested between runs going all out should equalize the energy expenditure. More details please, Paul. If the Lendahl was heavier or had a more flexible shaft that may account for some of the difference. Matt Broze http://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/ ***************************************************************************Received on Sat Jul 20 2002 - 18:35:31 PDT
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