Which instability develops when an aircraft's center of pressure shifts rearward?

💡 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).

• Which outcome occurs when concrete alkalinity reduces around embedded reinforcing steel (rebar)?
• Which risk increases when sustained high tensile force compromises rebar anchoring?
• In a MOSFET-based amplifier circuit at high frequency, which effect causes gain reduction?
• Which system degradation accelerates when transformer oil moisture exceeds limits?
• Which consequence results downstream when a flow control valve is improperly calibrated in a hydraulic actuator system?
• Which consequence results when ground impedance is high in substation delta-wye transformer systems?