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← TechnologyWhich risk significantly increases when exceeding a helicopter's retreating blade stall airspeed limit during forward flight?
A)Loss of control authority✓
B)Rotor blade thermal runaway
C)Increased engine combustion instability
D)Compressor stall induced hyperventilation
💡 Explanation
Loss of control authority increases greatly due to asymmetric lift. Retreating blade stall occurs because the advancing blade travels at a higher relative airspeed than the retreating one, therefore lift is asymmetrically reduced rather than being uniformly distributed.
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