Draft (sail)

Influence of mainsail draft position on forward and side force

In nautical parlance, the draft or draught of a sail refers to the amount and shape of curvature in a horizontal cross-section.[1] Any sail experiences a force from the prevailing wind just because it impedes the air's passage. A sail with draft also functions as an airfoil when set at an angle slightly greater than the angle of the wind, producing lift which then propels the vessel.[1]

The word "belly" is also used in reference to the draft of a sail (i.e. "More belly in the main sail.").

See also

References

  1. ^ a b Barrie Smith; Jeremy Evans; Pat Manley (5 August 2013). The Sailing Bible: The Complete Guide for All Sailors from Novice to Experienced Skipper. Bloomsbury Publishing. pp. 83–. ISBN 978-1-4729-0157-6.
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