In aircraft longitudinal dynamics, the Short-Period mode is dominated by which state variables?

(A) Pitch angle heta and angle of attack lpha (at nearly constant speed V)

(B) Speed V and altitude h (at constant angle of attack)

(C) Sideslip eta and roll rate p only

(D) Pure yaw rate r without pitch

Answer Key:

A

### Solution: The Short-Period mode is a rapid pitch oscillation involving angle of attack lpha and pitch rate q, with airspeed remaining virtually constant. Correct: A.

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