At 08:30 28 March 2005, Bruce wrote:
Wind gradient?

If you have a speed differential of a couple of knots
between the 50' low and
the top of the pull up you are effectively getting
'free' energy and will get a
higher apogee.

On reflection, it'll be pretty hard to figure this
out from flight logs, since even the new SeeYou wind
calculator doesn't work that low in the boundary layer
- so you won't see the gradient directly.

I would presume that you'll do better (higher) finishing
into the prevailing wind than going downwind since
the wind generally picks up with altitude between 0
and 500 feet.

9B