MadSci Network: Physics

Re: How can sailboats sail directly downwind, faster than the wind?

Date: Thu Jul 22 14:21:36 1999
Posted By: Jack Eystad, Staff, e-6, Don
Area of science: Physics
ID: 931850646.Ph

        in laymans terms...:)...sailing down wind or running can become fun 
the drag is countered by enough lift/wind...consider the true wind
(vertically) and your speed (horizontally) on a vector diagram...
on this 90 degree angle APPARENT WIND will become the most important
energy source...just like holding your hand out of a car window at 10 mph
with the wind in your face at 5 mph, the apparent wind will be 15 mph...
I found this info at   or http://socrates.berkeley.e


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