Jim Wilson wrote:
This suggests that both bernoulli and the pushing (gravity) are at play, depending on the airfoil. My (uneducated) guess is the pushing is almost all of it and that the bernoulli effect only augments: http://observe.arc.nasa.gov/nasa/exhibits/planes/planes_1c.html
There's a pressure differential either way, but since icing on top of the wing kills lift more than icing on the bottom, I'll guess that the low pressure on top is at least as important as the high pressure beneath.
All the best,
David
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