OutdoorsTried-and-true tip

Wool telltales on the luff show airflow

Wool telltales on the luff show you whether air is flowing smoothly over your sail.

Time
⏱ 5 min
Difficulty
◆ easy

What you need

  • Wool telltales

How to do it

  1. Attach the wool telltales to the front edge of the sail (the luff), roughly at its deepest point.
  2. Watch them while sailing upwind.
  3. Trim the sail so the telltales stream backwards.

Variations

  • Ribbons on the leech and on the shrouds also work, as they are lighter.

Sources

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