Almost all of us began our flying careers with a ground school in which we were introduced to the concept of aerodynamics using simplified versions of Bernoulli’s principle over a thick “Clark Y” airfoil. And we were told an airfoil always stalls at the same angle of attack (AOA) regardless of the airplane’s speed and pitch. You were probably also taught that the separated boundary layer is created at the airfoil’s trailing edge and progressively moves forward ...

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