So says Wolfgang Langewiesche:
FORGET BERNOULLI’S THOEREM
The angle at which the wing meets the air; what does it mean?
To understand this, you have to go back to a simple idea of how a
wing really manages to fly. how lift is developed. When you studied
theory of flight in ground school, you were probably taught a good
deal of fancy stuff concerning an airplane’s wing and just how it
creates lift. As a practical pilot you may forget much of it.
All the fancy physics of Bernoulli’s Theorem, all
the highbrow math of the circulation theory, all the diagrams show¬
ing the airflow on a wing—all that is only an elaboration and more
detailed description of just how Newion’s law fulfills itself—for in¬
stance, the rather interesting but (for the pilot) really quite useless
observation that the wing does most of its downwashing work by
suction, with its top surface. Trying to understand the piloting of air¬
planes by concentrating on Bernoulli and Prandtl is like trying to
catch on to tennis by studying just exactly how the rubber molecules
behave in a tennis ball when the ball hits the court and just exactly
how the catgut behaves in the racket when the ball strikes: instead
of simply observing that it bounces!
This post is what reminded me of this book.
Question is how much, or what kind of theory is needed to master tasks which are not intuitive? Or contrary to common sense?
What’s needed is not theory per se but a useful mental model.