I'm guessing that these textbooks for pilots are labelled things like "Fundamentals of Flight"[1] or "Pilot's Manual" and not "Theoretical Aerodynamics". I thin

I'm guessing that these textbooks for pilots are labelled things like "Fundamentals of Flight"[1] or "Pilot's Manual" and not "Theoretical Aerodynamics". I think it is a peculiarity of music that the field labelled "music theory" is actually about music practice (or perhaps music description), at least at the introductory level. And this causes frustration in a certain subset of people. For example, you don't find the info from this article in the wikipedia page on Music Theory, though you do find it in the "Music and Mathematics" page. I understand that there's more to music theory than rational numbers and the twelfth root of two, but it was the first thing that ever explained to me why something was true in music. In contrast to the circle of fifths which shows that there is a pattern but does not explain form where that pattern came. [1] Actually I googled this one and it exists and it seems to be about the design of aircraft; a case where it's perhaps more theoretical than I would have guessed.