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← TechnologyWhich instability develops when an aircraft's center of pressure shifts rearward?
A)Elevator reversal lowers pitch rate
B)Phugoid oscillations gain amplitude✓
C)Dutch roll increases abruptly violently
D)Aileron flutter couples modal frequencies
💡 Explanation
Phugoid oscillations will gain amplitude due to the reduced static stability margin. Because of a rearward shift, the restoring moment decreases driving divergent behavior from the natural oscillation frequency of the aircraft, therefore B, rather than a control surface issue (A, D) or lateral instability (C).
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