American Sailing · video

What this video covers

Sail trim relies on balancing lift and drag forces generated by the sails against the lateral resistance of the keel.4:37 Upwind performance requires generating lift through a curved foil shape, while downwind sailing maximizes drag by presenting the largest possible sail area to the wind.11:32 Effective trim involves three primary controls: angle of attack, sail depth, and twist.5:55 Increasing the angle of attack creates laminar flow, while adjusting sail depth—flattening the sail in heavy air and deepening it in light air—regulates power.6:33 Twist, controlled primarily by mainsail sheeting, allows the sail to spill wind in choppy conditions or maintain airflow in light, flat water.7:07 When using multiple sails, such as a mainsail and jib, the leeches must be trimmed to match so the sails work in harmony.8:49 Sailors can optimize performance without changing sails by adjusting lead positions on tracks to alter sheeting angles, which changes the sail's shape and effective range.19:16

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