FAA Questions/Airline Transport Pilot/Question #69
weight balanceFAA-published sample question (ATM, Aug 2021)

When does a typical aircraft exhibit reduced longitudinal stability?

A

With the Center of Gravity (CG) near the aft limit.✓ Correct Answer

B

With the Center of Gravity (CG) near the forward limit.

C

With the Center of Gravity (CG) at a mid-range location.

Explanation

Longitudinal stability decreases as the CG moves aft, because the tail's restoring moment arm shortens; near the aft limit the airplane is least stable. A forward CG increases stability.

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