
	Where results make sense

Topic: Leeboard

Related Topics

Leeward

Rahaga

Forecastle

Figurehead

Poop deck

Television Personalities (band)

War of the Stray Dog

Royal Black Preceptory

Niki

John Bowne House

Douglas TenNapel

G8

	Leeboard - Wikipedia, the free encyclopedia
		As nearly all sailboats tack to work their way upwind (with the exception of the proa), 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 both sides while under way.
		Leeboards are not common in commercially built boats, because many people consider them inelegant and awkward (thus preventing them from being used in commercial boats, and perpetuating the cycle).
		Leeboards simplify construction of the hull, as they are attached to the outside and do not require holes in the hull, which can leak.
	en.wikipedia.org /wiki/Leeboard (388 words)

	Building A Rig
		Mounting the leeboard to the thwart, Diagram D. Mounting the leeboard to the thwart requires an L-shaped bracket, a 4X4 piece of hardwood or aluminum, from the thwart to the height of the leeboard.
		Hardware: The leeboard is held to the bracket by a 1/2" or 3/8" thick carriage bolt.
		As shown in Diagram C, Bob Halsey uses an oak leeboard and a fiberglassed wood bracket on the leeboard thwart.
	www.enter.net /~skimmer/building/building.html (640 words)

	Mediterranean Avenue Press
		I have found that with minor modifications to the leeboards, boat handling is easier, and performance is improved.
		Originally I called for the leeboards, operating simultaneously, to be 4% of the sail area.
		A leeboard's worst liability is the water it traps against the hull.
	www.mediterraneanavenue.com /update.htm (998 words)

	Photos of the DH boat 3 (Site not responding. Last check: 2007-09-01)
		Note that the forks that attach the leeboard to the hull straddle the frame.
		In practice the leeboard is strong enough to survive being left on one side when sailing on either tack.
		The whole rudder and leeboard assemblies were made out of scrap 1/2 inch thick exterior plywood that was given to us at a house building site from their scrap pile.
	www.mcallen.lib.tx.us /staff/gm/dhboatp3.htm (687 words)

	Dragonfly Canoe Works Sailing Canoe Hardware
		It is adjustable in width, to allow the leeboards to be correctly positioned fore-aft, regardless of the changing beam of the canoe.
		Hook Bolt - This is an L-shaped bolt with wing nut that is used to clamp the leeboard bracket to the gunwales.
		This is used to hold the leeboards to the angle braces.
	www.dragonflycanoe.com /otacc/index.html (753 words)

	scow46
		The drawing shows the starboard leeboard - the port one is assembled the other way round (eg, the leeboard handles are outside the leeboards on the boat).
		The leeboards and handles can be fixed together either by epoxy bonding (eg, epoxy/microfibre 'glue') with a couple of screws to hold the parts while the 'glue' sets, or just by screwing them together.
		It may be necessary to recess the inner nut into the leeboard arm, as the length of thread may be insufficient to go through the whole thickness of the arm.
	www.angib.pwp.blueyonder.co.uk /scow/scow46.htm (596 words)

	Leeboard question - Page 2 - Boat Design Forums
		But as for why face the leeboards outward, the leeboards are foils, and you only have one of them down at any given time.
		With the leeboard being to one side of the hull it seems the board would try to lift the entire weight of the hull and that the pivot point would lie somewhere between the leeboard and the mast.
		The biggest difference, in addition to some hydrodynamic inefficiency of the leeboard, is that the leeboard sinks deeper into the water as the boat heels, except for single-leeboard setups, where on the opposite tack, the leeboard (now on the weather side) pulls out of the water.
	www.boatdesign.net /forum/showthread.php?p=35291 (908 words)

	Journal of a 20' Micmac - Sailing refinements
		Leeboard thwart: The foam pads on the jaws turned out to be too squishy and were later replaced with leather.
		Leeboard: I got some white oak pieces from Greg that weren't clear enough for his handrails, but had sections in them to make a 60" long leeboard, so I laminated several pieces together to make a 14" width.
		The leeboard hit the floor with a painful crash, and I had to repair the edges where the impact knocked the fiberglass loose.
	www.peak.org /~innercom/Canoe/journal3.html (974 words)

	EPOXYWORKS
		This arrangement used existing reaction points, gave the saddle a large footprint on the deck to distribute the loads, and, most importantly, didn’t hurt the kayak if we were horribly off in our thinking.
		We then positioned and aligned the upright and top panels using the leeboard and a centerline string stretched from bow to stern.
		After the saddle was cured, trimmed and coated, we bonded G10 wear pads on the mating surfaces of the saddle and leeboard to provide local strength and abrasion protection.
	www.westsystem.com /ewmag/16/alternate.html (860 words)

	Duckworks - Projects
		It began with my realization that I seldom lifted the windward leeboard on my Klepper Aerius II with the S4 rig and mizzen, and what I've seen from pictures and movie clips, that is quite common.
		Also, with my outrigger arm clamped to the leeboard thwart and thus sticking out on the starboard side of the kayak, it interefers a little with the starboard leeboard, which therefore can only be folded forward.
		The original Klepper leeboard seems to have been unchanged the last 50 years, both to outline and profile (nil profile, it is just a piece of birch plywood, with rounded corners).
	www.duckworksmagazine.com /05/projects/leeboard/index.cfm (642 words)

	Jim Michalak's Boat Designs/The Index
		But to recap, the things you might remember are that the immersed area of the board should be about 4% of the sail area, and that the leeboard must be mounted at the hull's widest beam in order to be in flow parallel to the boat's motion.
		As a result only one of these pivoting leeboards is needed on the boat, it works on both tacks, where the tradional loose leeboard only works on the lee tack so two are required.
		Birdwatcher type boats have a problem with a leeboard like this in that there is no convenient access to the outside of the hull to handle that lanyard.
	homepages.apci.net /~michalak/15jul04.htm (2077 words)

	Rigging Your Canoe for Sail (Site not responding. Last check: 2007-09-01)
		One leeboard on the port side is sufficient.
		lateen sail, the leeboard should be 8" to 9" wide and have at least 30" of the board in the water.
		The leeboard thwart should be approximately 8" to 12" forward of the center of the canoe.
	www.cedarislandcanoes.com /WCHA-Sailing/rigging.html (774 words)

	Cedar Island Canoes - Make Ready for Sail!
		The leeboard thwart, seen at the bottom of the picture to the right, is in many respects the heart of the sailing rig.
		The leeboard thwart's strength and structural integrity is guaranteed by a hand-made bronze leeboard bracket that secures the leeboard thwart's face plate to horizontal the member.
		The leeboard is always placed on the port side of the boat so that if the leeboard hits an underwater obstruction, the force against the leeoboard will loosen the bolt that holds it in place, allowing the leeboard to kick up.
	www.cedarislandcanoes.com /infostation/resource.html?id=makesail&page=2 (282 words)

	Ship Modeling FAQ, Research Note Leeboards --- Revised: January 1, 2004 (Site not responding. Last check: 2007-09-01)
		The tumblehome of the hoogaars' side result in the leeboard on the lee side being vertical, when the vessel is heeled to the wind.
		To counteract this, the edges on the inboard side of the board are faired off front and back, so that the leeboard presents to the water a sort of airplane-wing section, which generates 'lift', and tends to push the vessel to weather.
		In some cases, the leeboard is angled a few degrees towards the centreline, so that the water exerts pressure pushing the ship to windward.
	home.att.net /~ShipModelFAQ/ResearchNotes/smf-RN-Leeboards.html (422 words)

	a.b.b. - amateur boat building - centre board size
		The sail (114 square feet) and leeboard areas are 12 feet apart on Frolic2 so the maximum sail force we can stand without capsize is 129 pounds (which happens in about 15 knots of wind).
		The force on the leeboard is assumed to be the same as the lateral force of the sail at that time, so the maximum force on the board would be 129 pounds.
		As a contrast to that, I enlarged the leeboard on my Piccup Pram after a couple of seasons and noticed an enjoyable improvement in its ability to sail to windward, especially with the larger sails had I started to use.
	www.amateurboatbuilding.com /articles/design/board/board_size.html (1551 words)

	Solway Dory - Entry point
		This is a leeboard fastened to the canoe with a length of cord that hangs over the leeward (downwind) side.
		This is perhaps the original form of leeboard and it's simplicity is appealing.
		The rudder is subject to the same hydrodynamic forces as a leeboard but because it is usually about half the size of the leeboard the drag from it will be smaller.
	www.solwaydory.fsnet.co.uk /articles/rudders/rudders.html (2030 words)

	PDRacer Sailboat
		This is the oldest types of board, basically it is a board that is hung on the gunnel by a piece of rope, and a 2nd piece of rope hoists up the aft edge.
		Since the PDRacer is a boat which uses many different sail rigs, Andy came up with a sliding leeboard hanger so he could move his leeboards forward and aft wherever he wanted, and can even adjust their location when sailing.
		Single leeboards like the Michalak leeboard above need to have their pivot points in the middle the hull.
	www.pdracer.com /keel (1626 words)

	kayak sailing
		The water pressure keeps the leeboard in place under sail.
		The leeboard does have positive buoyancy so it will not sink if detached from the boat.
		While this works better for sailing, it is a lot of equipment to have on the front deck if you are planning on paddling.
	mysite.verizon.net /gdwelker/kayaksailing.html (415 words)

	North Sails One Design
		The leeboard and rudder are important parts of your boat and taking care of them carefully should be your first concern.
		When sailing downwind it is recommended that the leeboard be lifted out of the water, but only if you feel comfortable doing it.
		Be very aware that when the leeboard is out of the water this limits your maneuverability on the course.
	www.northsailsod.com /class/sabot/sabot_tuning.html (1273 words)

	Eclectica
		Here she is close-hauled on the starboard tack, with the sprit to windward and the leeboard to lee.
		With that shallow bottom and spade leeboard, she turns on a dime and is very quick in stays.
		I find no need to carry the "leeboard" on the lee, as it appears to work equally well to windward; this is a good thing, because taking the time to swap it over when tacking would leave you vulnerable to gusts.
	www.eclectica.ca /boatbuilding/nymph.php (931 words)

	Setting Up Your Sailing Canoe (Site not responding. Last check: 2007-09-01)
		The mast step should be placed in relation to the location of the leeboard thwart and vice-versa for a balanced rig.
		The center of effort of the sail should be over the leeboard thwart and then move it a little aft.
		Readjust the leeboard and position of the leeboard thwart until you find the optimum sailing ease.
	www.paddlin.com /fivelakes/balrig.html (1393 words)

	Duckworks Boatbuilders Supply
		The guard braces the leeboard to take loads in both tacks and only one leeboard is used.
		The leeboard pivots on a bolt near the waterline.
		The leeboard is under the upper guard with a small eye protruding through the slot.
	www.duckworksbbs.com /plans/jim/caprice (1451 words)

	Some of Jim Michalak´s articles about sail area math, sizing sails and boards, sail balance and center of gravity
		You should be able to hold the boat on course with the rudder but in that case the rudder will have "lee helm" where you have to use the rudder to push the stern of the boat downwind.
		The rudder must be deflected to push the stern towards the wind and the force on it is subtracted from the load on the leeboard.
		Once you've figured the righting moment, all you need to do to balance the boat is to divide the righting moment by the distance between the center of area of the centerboard (or daggerboard of leeboard or keel, whatever you are using to prevent leeway) and the center of area of the sail.
	www.boatbuilding-links.de /Jim-Michalak/sail-math-and-thoughts-of.html (7893 words)

	Canoe Sailing Techniques (Site not responding. Last check: 2007-09-01)
		Both pivoting the leeboard up and down and moving your weight fore and aft are the easiest ways to affect the balance of your sail rig.
		To sail before the wind, raise the leeboard to a diagonal and lean your weight aft.
		A wood paddle is the least slippery; cord or a leather piece wrapped and sewn around the shaft at the point of contact retards slipping.
	www.enter.net /~skimmer/techniques.html (393 words)

	Boatbuilding.net \| Building with KevlarÂ braid - Building the leeboard bracket
		The leeboard bracket is designed to transfer all of the side loads of the board through the hub and into the hull without being permanently attached to the hull.
		Figure 3Â—A carbon plate, the vertical face upon which the leeboard pivots, is attached to the deck piece.
		The laminated plate is clamped to a piece of stiff plywood, which is aligned plumb and parallel to the centerline of the boat and holds the plate to the deck piece.
	www.boatbuilding.net /article.pl?sid=06/02/02/2116238&mode=thread (490 words)

	Canoe Sailing Rig
		A Leeboard is the same as a center or dagger board, except that it is attached to the side of the boat.
		That little patch in the middle is there because originally, I was going to have two leeboards, with a different mount design.
		The idea behind this was to let me move the mast location within the boat in order to get the center of effort to make sure that the center of lateral resistance is on the leeboard.
	www.captainfletch.com /projects/boats/sailcanoe/sailcanoe.asp (620 words)

	Re: 18ft old town sailing rig drawings or plans (Site not responding. Last check: 2007-09-01)
		Leeboard thwart location is determined by the location of the mast.
		Postion of the actually leeboard while sailing is determined by point of the wind you're on.
		Sailing to windward - leeboard should be straight down, sailing on a reach - leeboard can be straight down or pulled back, sailing on a broad reach - leeboard can be pulled back or pulled up completely, sailing with the wind - leeboard should be pulled up completely.
	www.wcha.org /wbbs/archive/2000/index.cgi?read=5500 (510 words)

	The Jakarta Post - The Journal of Indonesia Today
		The position of the leeboard conforms with the type of sandeq sail used on the basis of the experience and knowledge of Mandar sailors obtained in the course of several centuries.
		The type of a boat with a leeboard has become an example for cruise and competition boats such as the catamaran and trimaran.
		Since the 1960s, for example, the stern leeboard, previously fixed in the middle between the columns and the steering room, has been moved to the middle of the boat's hold.
	www.thejakartapost.com /yesterdaydetail.asp?fileid=20020928.R03 (1136 words)

Try your search on: Qwika (all wikis)