On 30 Apr 01, at 16:07, Michael Edelman wrote: > I've read a lot about seasocks lately. Some of it seems to be based on > good physics but not necessarily direct experiment. Actually, the theory about the partial vacuum is not good physics. The material of the seasock is so soft it can not cause any pressure difference between the air in the boat and the air in the seasock. The burping does nothing to the air pressure, it only reduces the amount of ait within the boat, and increases the amount of air within the seasock. In order to create a pressure difference you need: - a stiff material that can be loaded in bending (pressure vessel) -or flexible material that is loaded in tension (blown up balloon) The seasock is a flexible material, bot not loaded in tension unless you would burp it by vacuumising the interior of the boat using a pump. Greetings, Merijn > ************************************************************************** > * 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/ > ************************************************************************** > * ****************************** Merijn Wijnen Vinkenhofje 8 5613 CN Eindhoven The Netherlands Tel.: 040-2939991 (job: 040-2650539) Fax: same as tel., call before sending or try twice E-mail: Home: merijn_at_music.demon.nl Job: m.wijnen_at_ind.tno.nl Web-site: http://www.music.demon.nl *************************************************************************** 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 Tue May 01 2001 - 10:16:28 PDT
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