At 3:29 AM -0700 5/18/01, Peter A. Chopelas wrote: > > > >> As long as you move the paddle parallel to the direction of motion >> >> desired all the force applied will go directly to propelling the >> >> boat. >> > >> >This is totally false and again based on uninformed intuitive ideas. >> >> Is it really? Please re read it. Any force you apply parallel to the >> motion of the boat will be useful for moving the boat in that >> direction. Are you suggesting that forces don't create reactions in >> the direction they are applied? > > >My statement is correct, you have not thought this through. Just because >you pull a paddle strait back does not mean your effort "will go directly >to propelling the boat". You will push water in every direction (including >backwards), but you also get turbulence. Turbulence heats the water and >pushes it in directions not useful for forward movement, using up power and >therefore it is wasted effort, i.e. poor efficiency. As Michael Edelman pointed out, my statement at the top amounts to a tautology. As he paraphrased it: "force that produces thrust, produces thrust." If you choose to argue "X" does not equal "X", I can only conclude that you are more interested in insulting me than in having a reasonable discussion. I'm sorry, I will not participate. I learn from your disagreement, but your insults are worthless to me. Nick -- Nick Schade Guillemot Kayaks 824 Thompson St Glastonbury, CT 06033 (860) 659-8847 *************************************************************************** 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 May 18 2001 - 09:51:25 PDT
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