ORIGINAL: KC36330
heat radiation from the ground also plays a big part in ground effect, i fly primarily off concrete (hate a dirt/grass field) and you can notice a considerable lift from the heat rising off the concrete as you fly over at low altitude, it's almost like a bump where the heli rises a few inches as it passes over the hard top.
kc
That's interesting, that's never ocurred to me before, I rarely fly over concrete, i'm gonna try this out the next time I go flying, weather is shaping up real nice real quick over here!