Sail aerodynamics

On Sat, 24 Jan 2004 09:32:59 UTC, Andy Champ <no.way.RemoveThis@nospam.com>
wrote:

 >
 > Otso wrote:
  > > For those interested in the aerodynamics of sails: we have posted a new
  > > article "
  > > Flow simulation around sails with CFD" at
<font color=green>  > > <a style='text-decoration: underline;' href="http://www.wb-sails.fi/news/470StreamAnim/index.htm</font" target="_blank">http://www.wb-sails.fi/news/470StreamAnim/index.htm</font</a>>
  > >
 >
 > I've seen that VO60 shot before. Do you happen to know which way the
 > wind is blowing? I can't see the boats well enough to tell.

The helicopter is just under the starboard bow of the closest boat.
The wind is coming from a point to the right (as we see it) of the
picture. If we could measure the exact angle of the boat, to the
vortex stream there would probably be a limited number of solutions
for the wind strength, true wind angle, apparent wind angle and boat
speed which would produce the pictured result.

Geoff<!-- ~MESSAGE_AFTER~ -->
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