Discussion
Which derivative is central to the manoeuvre margin, as distinct from the static margin?
Answer: C
The manoeuvre margin exceeds the static margin because a steady pull involves a pitch rate, and the pitch damping derivative adds a stabilising increment that a straight-and-level incidence change does not have. Pitching moment with incidence gives the static margin, which is the baseline the manoeuvre margin is compared with. Elevator lift is a small direct-lift term. Drag with speed belongs to the phugoid and to performance.
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