JB,
Because Bernoulli wasn't a ham radio operator, he didn't know about the Q Code and so after deriving his fundamental principle that "p + 1/2rhoVsquared = constant", he or someone following him had as much trouble writing the second bit as I had and said "let's simplify the second expression by making q = 1/2rhoVsquared [the good old dynamic pressure, as you well know] and we can write p + q = constant and also refer to all of those things that relate to dynamic pressure as 'q' related."
Then some technical editor decided that it was not kosher to describe a part of a feature or begin such a description with a lower case letter, and so 'q'pot became Q Pot... etc
PS I looked up a bunch of real aerody books to try to enhance my image with a heavy quote, but they all saw me coming and wrote it in full!!
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Stay Alive,
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