On 14 Aug 2004 17:19:25 GMT, (JAXAshby) wrote:

no, the keel has not a thing to do with understanding how a sail works.
nothing.

it does have something to do with how a sailboat works, but not a thing on how
a sail works.


You are correct.

But the initial posting was :"I'm trying to understand how a boat can
sail against the wind."

Understanding the sail as airfoil is not 100% of the answer. One must
also consider the effect of the keel.

Jack

__________________________________________________
Jack Dale
Swiftsure Sailing Academy
Director/ISPA and CYA Instructor
http://www.swiftsuresailing.com
Phone: 1 (877) 470-SAIL (toll free)
__________________________________________________