by Quote:
>method (that I'm aware of). Is there some other way to be accurate to
>within 1 mph? Are the wind ratings on kites based on ground wind? Given
>the right textures on the ground, the wind twenty feet up can easily be
>+/- 5 mph from ground winds. Is there some mysterious way to calculate
>the difference?
Only the plus sign applies; If you measure the wind speed with a meter >within 1 mph? Are the wind ratings on kites based on ground wind? Given
>the right textures on the ground, the wind twenty feet up can easily be
>+/- 5 mph from ground winds. Is there some mysterious way to calculate
>the difference?
in your hand, you can be sure the wind speed will be more above that level.
In a competition this measuring method works well for the check
of minimum wind speed condition. Check for maximum wind condition
is more difficult because it should be done on top of wind window.
Although the rule book does not say anything about the measuring
levels, in practice the check for maximum is also done at the
height the field director can reach.
You can also expect the wind ratings for kites are based on
estimates (measurements?) on ground level.
"Sailing Theory and Practice", by Marchaj (sp?) has some
empirical models, which should be applicable for beach
conditions. Inland conditions differ because of the texture
of the ground.
Smooth Winds
Quote:
>Sighhh...I'm glad I don't have to be an aerospace engineer to enjoy
>stunting...<g>.
>David J. Harris
>---------------------------------------
>Compuserve: 71776,523
>stunting...<g>.
>David J. Harris
>---------------------------------------
>Compuserve: 71776,523