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post #21 of Old 06-19-2015
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Re: Sailing with excess brain power

Originally Posted by capta View Post
This actually makes much more sense to me as the actual distance across the front and back sides of the sail cloth are but that layer of cloth different, not at all like the wing of an airplane which actually has a distance difference.
Lift does not require a curved surface, nor even a difference in distance over the two sides of the foil. If it did, planes would not be able to fly upside-down.

"A flat plate can generate lift, but not as much as a streamlined airfoil, and with somewhat higher drag." ... as long as there is an angle of attack.

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