In a conventional twin-engine aircraft with clockwise rotating propellers, which engine is considered the 'critical engine' and why?
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A
The right engine, because its failure results in a greater loss of rudder effectiveness due to spiraling slipstream.
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B
The left engine, because P-factor and torque from the right engine create the most adverse yawing and rolling moments.
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C
Neither engine is critical if the aircraft is equipped with counter-rotating propellers.
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D
The inboard engine on a four-engine aircraft, because its thrust line is closest to the fuselage.