What causes lift in aerofoil: Bernouli's principle or Newton's third law? Reading materials online, I observe some explanation based on Bernoulli's principle, quoting the difference of air pressure above/below and difference of speed of airflow. While some say's Bernoulli's principle works only in special conditions (laminar, non-viscous, non-compressible, streamline, etc.) and the correct working is based on Newton's third law whereby, the airfoil pushes the stream downward and experiences lift upwards.

Bernouli's principle is also said to not work for symmetrical aerofoils and inverted aerofoil.

What is the final verdict of what causes lift?
I think it is erroneous to say that lift is solely produced just because of the Bernoulli's or Newton's law.

Sixty Symbols(A youtube channel) explains the best how a wing actually produces lift.


                
            

Instead of explaining I thought this video might help you more than my explanation. And also look at "Incorrect Lift theory" by NASA