ORIGINAL: dick Hanson
So the lifting surface becomes a drag surface -
OK
Ot lets say the low pressure which was on th top surface simlply becomes VERY low pressure as the wing rotates.
T/F?
The lift is then drag.
It's all the same thing - just depends on what you want to call it
Concerning the "low pressure" or "wake" area, you are partially correct. When the wing is at low AOA and in forward motion, lift is created along the top surface due to "Bernoulli's" law, but this is not the same as what is happening at the back edge of the wing or "wake". When the wing is rotated in your scenario, the low pressure area behind the wing does become "very low" pressure, which is "drag". Even if you take this away, you still have another type of drag along all surfaces of the wing in which air is moving past due to "friction".