Let someone know where you're going and when you'll be back. Then, when you're back ashore, cancel the float plan by letting the person know you've returned. Safety Give the safety handout and lecture. Sail zones and no sail zones Examine the sail zones Creation of the wheel Students will get into groups and create their own wheel of sail zones. This can be done in any way.
Environmental Concerns Examine the environmental handout .
As wind approaches the leading edge of the sail, it separates and flows along both sides of the sail from luff to leech. The air on the windward side reaches the leech first, since it has a shorter route to travel. The results is lower pressure on the leeward side of the sail creating a lift perpendicular to the wind. Another way to look at how an airfoil works is the wind on the outside curve is spread out, so its pressure is lower. The wind on the inside piles up, and its pressure is higher.