How a WINDSURFING SAIL Works in the Wind:

1- When the wind blows on a correctly trimmed sail the air flow separates and passes on either side of the sail.
2- On the leeward side, the wind is accelerated by the built-in curve of the sail. This results in an area of low-pressure
3- On the Windward side. An area of high-pressure is created, thus creating an imbalance in air pressure.
4- This difference in air pressure actually pulls the sail into the wind. More »