In fact, the theory that requires the simplest assumptions and least abstraction is typically considered to be the most useful. This is not necessarily because more advanced theories are harder to understand or require a lot maths. Most importantly, the equal transit time theory, explained further below, is taught in many school textbooks and therefore instils faulty intuitions about lift very early on. Just throughout my time in school and university, I have been confronted with several different explanations of how wings create lift. Given its importance to flight, it is surprising how many different and oftentimes wrong explanations are being perpetuated online and in textbooks. How airplanes fly is one of the most fundamental questions in aerospace engineering.
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