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← HistoryWhich outcome occurred on Viking longships sailing upwind when the angle between the sail and the keel became too acute?
A)Center of Effort shifting abruptly✓
B)Progressive sailcloth delamination occurring
C)Significant drag minimized speed
D)Reduced buoyancy increased friction
💡 Explanation
A longship risked broaching because changes in sail angle at shallow incidencce caused Center of Effort shifting. This created excessive weather helm. Therefore, the vessel became unmanageable rather than experiencing simple drag because of the sudden torque imbalance.
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