The reason the nose drops is that the elevator is NOT losing
lift while the main wing is, which pivots the aircraft nose down.

Not that either. Remember, in a conventional airplane, the tail is
pushing down. The center of mass is ahead of the wing's center of lift,
so the tail pushes down to keep the nose up. (think "big heavy engine
trying to tip the airplane forward").

When the wings stall, the nose drops because nothing is holding it up
(anywhere near as effectively as when the wing is not stalled).

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
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