Originally Posted by
portsharbourflyer
This is not a new idea, it has been known for years that the simplistic " Bernoulli" type explanation of lift used at ppl level and even cpl level theory is flawed. It can't explain why a flat plate produces lift.
A flat plate produces lift in the same way as an aerofoil does, it just produces a lot less becuase the flow over the plate is virtually completely non laminar when a small angle of attack is presented. Bernoulli's Theorem is not flawed at all and does explain why a flat plate produces lift but his theorum was written in regard to streamline flow, a point missed by many authors and comentators.
There has been no change in the way CAA (or knowledgeable instructors) teach or examine basic aerodynamics and the NASA site is correct.