Sail Theory
- Sails propel the boat in one of two ways. When the boat is going in the direction of the wind (downwind), the sails may be set merely to trap the air as it flows by. Sails acting in this way are aerodynamically stalled. In stronger winds, turbulence created behind stalled sails can lead to aerodynamic instability, which in turn can manifest as increased downwind rolling of the boat. . . . . . . . . The balance of the section is available in the unlocked Basic Sailing Manual. See below to order the full version or click on the next page to Preview more of the manual.
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