Outhaul

From Wikipedia, the free encyclopedia

An outhaul is a line which is part of the running rigging of a sailboat, which is used to extend a sail, and control the shape of the curve of the foot of the sail. It runs from the clew (the back corner of the sail) to the end of the boom. The line is pulled taut to the appropriate tension (to provide the desired shape to the foot), and then secured to a cleat on the boom.

The details vary, but the two most common methods are:

  • A knot, usually a bowline, is tied to a grommet provided for the purpose in the clew of the sail, then fed directly to the cleat.
  • The line is attached to the boom, lead through the same grommet, and thence to a cleat; this system provides a factor of two mechanical advantage over the previous one.

The outhaul, besides simply holding the sail out, is an effective sail shape control. Tightening or slackening the outhaul can flatten or fill out the sail, shift the draft forward or aft, change leech and foot tension, increase or decrease camber.


Sails, Spars and Rigging
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Sail anatomy and materials
Clew | Foot | Head | Leech | Luff | Roach | Tack | Dacron | Kevlar | Twaron
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Rigging components
Backstay | Block | Boom vang | Braces | Buntlines | Cleat | Clevis Pin | Clewlines | Cunningham | Downhaul | Forestay | Gasket | Gooseneck | Guy | Halyard | Outhaul | Parrell beads | Peak | Preventer | Ratlines | Rigging (Running) | Shackle | Rigging (Standing) | Sheet | Shroud | Stay mouse | Stays | Throat | Topping lift | Trapeze
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