Merijn, you said: "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." How would you explain the seasock retention, in good terms of good physics? I've noticed an interesting, perhaps related phenomenon lately. I now have a drytop, latex seals at neck and wrists. I tighten the waist bungy as far as bearable. If a little water gets into the cockpit, say from re-enter and roll practice, I then pump it out with a foot pump. As the water is pumped out, the spray deck depresses, and the cag starts to cling like shrink wrap on me! I then let in a little air by releasing the spray deck at the side of the coaming. If you can vacuum bag a boat, you can vacuum bag a paddler! Regards, Peter Treby 37º 42' S 145º 08' E *************************************************************************** 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 - 15:33:57 PDT
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