MY guess what happen, is that after you started to rotate, the warmer air
above started getting pushed down into the cooler air, warmed it up, (or
you
got into the warmer air) gave you less lift than the cool ground air, then
you started not lifting so good. Just a guess, though.

Man, that would require a layer just a few feet thick -- is that possible?

Actually, I know it is, as I've seen it at altitude. I suppose it can form
close to the ground, too, in a calm wind.

Strange how I can study weather in college, I can observe it carefully for
years, and I can spend so much time in the air -- and yet not understand it
very well at all.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"