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Which risk dramatically increases when an aircraft's airspeed falls below Vmc during engine failure?

A)Reduced lateral control effectiveness
B)Elevated structural fatigue cycles
C)Increased parasite drag coefficient
D)Exceeding critical Mach number

💡 Explanation

Reduced lateral control occurs because decreased airflow reduces aileron effectiveness; the Yawing Moment due to asymmetric thrust requires more rudder input, but below Vmc, the rudder doesn't fully compensate, therefore making coordinated flight impossible rather than maintaining stability.

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