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SEILmagasinet · video

Jib trim

13 August 2025 · 3 min · 1K views

What this video covers

Thomas Nilsson and Sigmund Hertzberg demonstrate headsail trimming techniques to optimize sail shape and airflow. To trim a jib, sailors should monitor the telltales, focusing on the lower set when beating and observing the full height of the sail when reaching.▶ 0:15 Adjusting the jib halyard tension and the jib sheet controls the depth of the sail; slacking the halyard or sheet increases depth for more power.▶ 0:48 The jib car position dictates the angle of the sheet’s pull.▶ 0:48 Moving the car aft flattens the bottom of the sail and opens the leech, which is ideal for heavy wind.▶ 1:15 Moving the car forward deepens the bottom and closes the leech for increased power in lighter conditions.▶ 1:36 Using an outboard lead block attached to the rail improves control during reaching, while an inboard lead narrows the sheeting angle for tighter upwind sailing at the cost of a narrower steering groove.▶ 1:36

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