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leeboard part 1
leeboard part 1
Published: 2015/01/05
Channel: Floyd Marsden
swept back leeboard
swept back leeboard
Published: 2009/02/08
Channel: Chuck Leinweber
Swing over lee board
Swing over lee board
Published: 2013/01/03
Channel: Tim Hofmeister
Wooden Dutch Leeboard Sailboat SCAGAN out of Charlottetown PEI Canada
Wooden Dutch Leeboard Sailboat SCAGAN out of Charlottetown PEI Canada
Published: 2011/05/08
Channel: lymanduggan
Leeboard Study
Leeboard Study
Published: 2016/05/25
Channel: Don Bedford
leeboard part 2
leeboard part 2
Published: 2015/01/10
Channel: Floyd Marsden
leeboard jig video
leeboard jig video
Published: 2009/09/29
Channel: Charles Jenkinson
Lee boards on the Perception
Lee boards on the Perception
Published: 2014/04/25
Channel: billpain
Testing Canting Lee Board
Testing Canting Lee Board
Published: 2017/02/03
Channel: RickWilloughby
Skutsje sailing - Lemmer (August 2015)
Skutsje sailing - Lemmer (August 2015)
Published: 2015/10/18
Channel: Andy Beharrell
Demonstration of Mach3 Cutting a Cut3D Toolpath of a Leeboard Foil
Demonstration of Mach3 Cutting a Cut3D Toolpath of a Leeboard Foil
Published: 2016/09/18
Channel: Mike John
Barge-Proa sailing upwind with a leeboard.
Barge-Proa sailing upwind with a leeboard.
Published: 2012/11/21
Channel: circlomanen
leeboard part 3
leeboard part 3
Published: 2015/01/12
Channel: Floyd Marsden
A leeboard
A leeboard
Published: 2013/04/22
Channel: KyungSig Jung
Canoe sailing Helford
Canoe sailing Helford
Published: 2016/07/08
Channel: John Thompson
Glass Fusing Mold made with Kaiser Lee Board
Glass Fusing Mold made with Kaiser Lee Board
Published: 2008/04/27
Channel: Petra Kaiser
Barge-Proa up wind without leeboard.
Barge-Proa up wind without leeboard.
Published: 2012/11/21
Channel: circlomanen
Upwind Kayak and Canoe Sail Rig with Outriggers and Leeboards
Upwind Kayak and Canoe Sail Rig with Outriggers and Leeboards
Published: 2014/10/21
Channel: David Guillot
Skateboarding History - Jason Lee
Skateboarding History - Jason Lee's Board Troubles
Published: 2013/10/12
Channel: tiltmodegnarly
30. Artemis - Leeboard support, mast reinforcement
30. Artemis - Leeboard support, mast reinforcement
Published: 2016/05/26
Channel: Koos Winnips
Trip Report: Nov. 18, 2007 Leeboard Hold Down
Trip Report: Nov. 18, 2007 Leeboard Hold Down
Published: 2007/11/19
Channel: TridarkaRaider
How to make a perfectly smooth Kaiser Lee Board kiln shelf.
How to make a perfectly smooth Kaiser Lee Board kiln shelf.
Published: 2011/12/20
Channel: Petra Kaiser
Leeboard on a windrider 17
Leeboard on a windrider 17
Published: 2010/08/19
Channel: peregrine116
Upwind Kayak and Canoe Sail Rig with Outriggers and Leeboards
Upwind Kayak and Canoe Sail Rig with Outriggers and Leeboards
Published: 2014/10/21
Channel: David Guillot
34. Artemis - working on the cockpit, leeboard support
34. Artemis - working on the cockpit, leeboard support
Published: 2016/05/26
Channel: Koos Winnips
What Is A Lee Board?
What Is A Lee Board?
Published: 2017/07/17
Channel: Sweet Home
fox whiskers lee board tweak
fox whiskers lee board tweak
Published: 2014/09/22
Channel: Monday Lion
Canting Lee Board - Flow Attached
Canting Lee Board - Flow Attached
Published: 2017/01/24
Channel: RickWilloughby
canoe sailing in poole harbour with a broken lee board 2015
canoe sailing in poole harbour with a broken lee board 2015
Published: 2015/04/10
Channel: boatidea
What does leeboard mean?
What does leeboard mean?
Published: 2017/03/29
Channel: What Does That Mean?
angry joe plays bruce lee board game and then raven
angry joe plays bruce lee board game and then raven's cry part 3
Published: 2016/06/10
Channel: Angryjoe Livestreams
Leeboard Meaning
Leeboard Meaning
Published: 2015/05/02
Channel: ADictionary
Joe Lee - Board Members Look Back
Joe Lee - Board Members Look Back
Published: 2017/04/25
Channel: CNYCF - Central New York Community Foundation
jose cerda and his general lee board
jose cerda and his general lee board
Published: 2010/05/19
Channel: Isaias Rodriguez
Sean
Sean's Toon2 Leeboard, Cabin tops, and companionway beams
Published: 2012/04/30
Channel: William Moffitt
Lee @ board and training
Lee @ board and training
Published: 2010/04/18
Channel: dimitrib31
Trying to sail a canoe with a broken lee board 2015
Trying to sail a canoe with a broken lee board 2015
Published: 2015/04/09
Channel: boatidea
broken leeboard on the sailing canoe Poole Harbour 2015
broken leeboard on the sailing canoe Poole Harbour 2015
Published: 2015/04/10
Channel: boatidea
angry joe plays bruce lee board game
angry joe plays bruce lee board game
Published: 2016/03/05
Channel: Angryjoe Livestreams
Rachel breaking her boards from the JK Lee Board break a thon.
Rachel breaking her boards from the JK Lee Board break a thon.
Published: 2013/03/03
Channel: Mark Wood
Master brandon lee board breaks PT.1
Master brandon lee board breaks PT.1
Published: 2011/06/20
Channel: vtecblazed
Master Brandon lee board breaks pt.2
Master Brandon lee board breaks pt.2
Published: 2011/06/20
Channel: vtecblazed
How to say "leeboard"! (High Quality Voices)
How to say "leeboard"! (High Quality Voices)
Published: 2017/01/28
Channel: WordBox
leeboard wood or metal planes attached to hull to prevent leeway
leeboard wood or metal planes attached to hull to prevent leeway
Published: 2015/08/13
Channel: Vanetta Bethel
GM Lee board break
GM Lee board break
Published: 2007/11/05
Channel: RMendiola4
Dee Lee Board Brake - 9/20/2014
Dee Lee Board Brake - 9/20/2014
Published: 2015/01/08
Channel: scottmoore17
Homemade Sailing Canoe - take 3
Homemade Sailing Canoe - take 3
Published: 2010/09/08
Channel: jyoder111
Puddle duck racer capsize on leeboard side
Puddle duck racer capsize on leeboard side
Published: 2013/07/21
Channel: cajunpdracer
Bigfoot - Leeboards linha
Bigfoot - Leeboards linha
Published: 2016/01/10
Channel: Lucas Araújo
PIA National
PIA National's Johnny Lee's Board Meeting Excerpt on 09/22/13 in Las Vegas, NV
Published: 2013/09/26
Channel: PIANational
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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A Dutch sailing barge showing its stowed leeboard
Thames sailing barges in the East Swin; the vessel in the foreground has a leeboard deployed.
Modern sharpie fitted with leeboards
A modern boat fitted with leeboards, The Centennial designed by Ted Brewer in 1979

A leeboard is a lifting foil used by a sailboat, much like a centreboard, but located on the leeward side of the boat. The leeward side is used so that the leeboard is not lifted from the water when the boat heels, or leans under the force of the wind.

History[edit]

Leeboards existed in China from at least the eighth century on warships that "held the ships, so that even when wind and wave arise in fury, they are neither driven sideways, nor overturn".[1] Leeboards used to stabilize the junk and to improve its capability to sail upwind, are documented from a book by Li Chuan. The innovation was transmitted to Portuguese and Dutch ships around 1570.[2][3][4] "The Portuguese experimented with caulking their vessels in the Chinese manner and the Dutch probably added leeboards to their craft that were copied from Chinese models."[5]

Leeboards have been used by relatively large inshore sailing vessels used for transport since 1570, such as Dutch barges and Thames barges. For these boats, leeboards provided the advantages of shallow draught for working close inshore and an unobstructed hold for cargo. They were also easier to build than a large centreboard would have been.

Current designs[edit]

Leeboards are no longer common in commercially-built boats, because many people consider them inelegant and awkward. They are far more common in home-built boats, especially the Puddle Duck Racer and stitch and glue type sailboats. Leeboards simplify construction of the hull, as they are attached to the outside and do not require holes in the hull, which can leak. Since centreboards are retractable, they require a large, watertight trunk to hold them in place when retracted, and this occupies what otherwise might be useful space in the cabin or cockpit of the boat. Use of leeboards, while it adds complexity to the process of tacking, leaves the floor of the boat unobstructed.

According to traditional design principles, a boat utilizing a leeboard either needs to have two retractable leeboards, one on each side, or a method of removing the leeboard and attaching it to either side while under way, because nearly all sailboats tack to work their way upwind (with the exception of the proa). However, some small sailboat designers claim to have created seaworthy vessels with only a single, fixed leeboard.[6][7]

On a traditional two-leeboard (or non-fixed leeboard) design, the boards are designed so that the windward board can be retracted, to reduce drag. Unlike centreboards, which are symmetric along the boat's axis, leeboards are often asymmetric, so that they more efficiently provide lift in one direction. Some fast racing scows use bilgeboards, which are mounted between the centreline of the hull and the sides, so they can use a pair of asymmetric foils for maximum lift and minimum drag.

See also[edit]

References[edit]

  1. ^ Li Ch'üan (759). Manual of the White and Gloomy Planet.  cited byRobert Temple (1986). The Genius of China. Simon & Schuster. 
  2. ^ Donald F. Lach (1977). Asia in the making of Europe. Volume II, A Century of Wonder. p. 403
  3. ^ Robert Temple (1986). The Genius of China. Simon & Schuster. 
  4. ^ Rees, Charlotte Harris (2008). Secret Maps of the Ancient World. Authorhouse (published June 10, 2008). p. 102. ISBN 978-1434392787. 
  5. ^ Donald F. Lach (1977). Asia in the making of Europe. Volume II, A Century of Wonder. p. 403
  6. ^ "The Tridarka Raider: A Trimaran for Coastal Vagabonds: Deck Plan". WaterTribe. Retrieved 8 February 2011. 
  7. ^ Mike Mulcahy (May 2006). "My Take on Philsboat". Duckworks Magazine. Retrieved 8 February 2011. 

External links[edit]

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