Originally Posted by
flying jocks
Yes, there is low pressure above the wing and this is caused by faster moving air above - but has very little contribution to overall lift of the a/c.
If Encarta says this then it is clearly wrong. The difference in surface pressure around the aerofoil accounts entirely for the lift the aerofoil produces. The difference in pressure is
associated with a difference in speed. What
causes what is a matter of philosophical debate.