Draft (sail)

Influence of mainsail draft position on forward and side force

In nautical parlance, the draft or draught of a sail is a degree 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 word "belly" is also used in reference to the draft of a sail (i.e. "More belly in the main sail.").

References

↑ 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.

Sails, spars and rigging

Rigs	Bermuda rig Cat rig Full rig Gaff rig Junk rig Ljungstrom rig Mast aft rig

Sail types	Asymmetrical spinnaker Junk sail Lugsail Parafoil Ringtail Spinnaker Turbosail Rotorsail Wingsail

Sails (sail plan)	Blooper Course Crab claw Driver Extra Fisherman Genoa Gennaker Jib Lateen Mainsail Moonraker Royal Skysail Screecher Spanker Spinnaker Spritsail Staysail Studding Topgallant Topsail Trysail Watersail

Sail anatomy and materials	Clew Foot Head Leech Luff Roach Tack Throat Peak Dacron Technora Kevlar Twaron

Spars	Boom Bowsprit Boomkin Dolphin striker a/k/a Martingale Pelican striker Fore-mast Gaff Jackstaff Jibboom Jigger-mast Jury rigging Main-mast Mast Mizzen-mast Truck Spinnaker pole Spreader Sprit Topmast Yard

Rigging components	Backstay Block Bobstay Boomkicker Braces Buntlines Chainplates Cleat Clevis pin Clewlines Cunningham Deadeye Downhaul Earing Fairlead Forestay Gasket Gooseneck Gunter Guy Halyard Kicker Lazy jack Outhaul Parrel beads Peak Preventer Ratlines Running rigging Shackle Spinnaker chute Standing rigging Sheet Shroud Stay mouse Stays Throat Topping lift Trapeze Traveller Turnbuckle Vang Windex

This article is issued from Wikipedia - version of the Sunday, March 06, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.

Draft (sail)

See also

References