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Which outcome results when a Viking longship sail experiences leech flutter?

A)Center of effort moves aft
B)Rudder effectiveness is enhanced
C)Hull speed potential increases
D)Draft requirements are reduced

💡 Explanation

When a sail experiences leech flutter, pressure distribution changes, causing the center of effort to shift aft because of aeroelastic instability. This change reduces maneuverability, rather than increasing rudder effect; therefore, the center of effort shifts aft rather than forward.

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