Sailing Theory Tutorials – Forces on Sails and Foils

Saling tutorial
In this video, the lift and drag forces on the sail of a boat are combined to form a resultant “Effort” Force vector.

The forces on foils below the water are discussed and the idea of leeway is introduced to explain how the foils experience flow at and angle of attack and generate lift just like the sails.

The effort and resistance forces are combined on a simplified 2D model of a sailboat to show how the boat develops thrust, which propels the boat forward.

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