Norm of Bandersnatch wrote: > I did not say that "'suction' plays no or very little role in making lift > on a wing", but that suction's role has been exaggerated while pressure on > the bottom of the wing has beeen ignored in the past. > > While the curve of a sail and the curve of the upper surface of a wing are > similar, still one is a sail and the other is a wing and the air flows > around them are different. > > > I was not referring specifically to you, Norm, as in looking into this I found that it is a common misconception that 'suction' has little to do with lift.
As for a sail being a wing or not, well, the aerodynanits (SP?) consider it so and define it so. In fact on the "Cruising DVD" you will find files that support that. Some of the snippits I included were taken from them, scientists in the know who were talking about sail theory saying it has been mis-understood and that lift is developed by "suction". And some sailboats have what can only be described as a wing turned on end for a sail. Not only that, a hang glider or ultra light has a wing that is just a sail turned on its side...air flow imust be the same as it would be for a sail! And even if you wish to maintain that a modern airplane does not have a 'sail' or that a sailboat does not have a wing, still, the idea that the majority of the force driving a sailboat upwind is 'puhing' is clearly incorrect. And that is my point also. It is suction that pulls a boat upwind, from the Coanad effect, not the Bern. Princ. -Ken _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
