On Dec 7, 2007, at 1:05 AM, Peter Treby wrote: > Amateur conjecture: An asymmetric airfoil produces lift away from > the higher > side of the foil when moved through a fluid. This is due to the > relative low > pressure on that side. A symmetric blade at an angle of attack > produces lift > away from the back side of the blade due to relative low pressure > on that > side of the blade, because of turbulance. The physics of lift are the same regardless of the blade form. The references John W. gave will get more explicit, but all that is required is that you redirect or turn the fluid that the "wing" is acting in. Shapes other than a flat plate can do this without an angle of attack, but they still create lift by deflecting the fluid. 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/ ***************************************************************************Received on Fri Dec 07 2007 - 07:00:35 PST
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