Aspect Ratio Meaning in Sailing

Aspect ratio is the relationship between the height and the width of a sail. A tall and narrow sail has a high aspect ratio for better efficiency. This design allows the boat to sail closer to the wind with less drag. A racing yacht uses a high aspect ratio mainsail to gain a speed advantage. Short and wide sails provide more stability but offer less performance in light air. Engineers calculate this ratio to balance the power and the handling of the vessel. Choosing the correct aspect ratio depends on the intended use of the sailing boat. High aspect sails are common on modern boats built for competitive ocean racing.