From: "Bob Myers" <bob_at_appereto.com> > You seem to imply that nothing can "fly" without an > internal power source. I disagree with that; sailplanes, > hang gliders, That's gliding, not flying. Flight requires power. > and even balloons do fly Bouyancy, not flight. > And how does it differ for a sailboarder, who also has no > internal power source? I have often heard that described > as planing. Power comes from the sail as it does in planing sailboats. The International Sailing Canoe I mentioned in a recent post is a sail-powered planing vessel. Again we see examples of where a layman's term differs from a specialist's. Specialists require exactness in terminology and will use terms in specific ways. Two subtly different phenomena are referred to by the specialist with distinct terms so inter-specialist communication is clear. Mike *************************************************************************** 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 Thu Jan 17 2002 - 15:36:52 PST
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