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Topic: Ketch rig


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  WHY A CAT KETCH
The rig type is, indeed, one that has been around for many years, and one which was greatly favored by the watermen of the East Coast before the age of power.
The rig fell out of favor not because it was inefficient, but because working sailboats became obsolete, and the recreational sailboats which have been built since, are influenced not by the need for efficiency and speed, but by an artificial rating rule.
In the cat ketch rig, jibing requires exactly the same degree of panic as the tack we just discussedÂ…you just put the helm over, pull in some excess sheet if you wish and let her slide out the other side.
www.bandbyachtdesigns.com /catketch.htm   (2128 words)

  
 Tanton Yachts
The Cat ketch rig is not an aberration but the most popular and prolific sailing rig of yesteryear, evolving from the New Haven Sharpie of the 1850's.
And preferably utilized with a Cat- ketch rig which subjects each mast to far lower loads in relation to the sail area than a similar size boat with cat boat rig or free-standing sloop rig.
The rig technology and hull designs have created Cat Ketch rigged yachts where each mast is, in effect, a true flex loading beam incorporated into a hull designed and constructed specifically to work with its qualities.
www.tantonyachts.com /catketchintro.htm   (1049 words)

  
 Ketch/Yawl Handling - SailNet Community   (Site not responding. Last check: )
Cutters had a rig with a single mast located 50% of the length of the sailplan or further aft, multiple headsails and in older definitions, a reefing bowsprit (a bowsprit that could be withdrawn in heavy going).
Multi mast rigs also have the issue of downdraft interference, meaning that each sail is operating in the disturbed and turbulent air of the sails upwind of it, which also greatly reduces the efficiency of multi mast rigs.
Scetch rig: it is not a schooner, nor a ketch.
sailnet.com /forums/seamanship/10050-ketch-yawl-handling.html   (4863 words)

  
 Revisiting a Mast-Aft Sailing Rig
A staysail was then rigged between the masts in place of the mainsail, and the boat regained 1 knot of speed while retaining its decreased leeway.
A ketch rig divides the sail area up into more manageable size sails, and it produces a rig with a lower center of effort (less overturning moment) than a sloop of the same sail area.
Plus, the weight of our rig (and particularly the mast) is more favorably centered over the boat's motion center, contributing less to the vessel's pitching motion (Almost like gaining the benefits of a modern carbon mast without having to have one).
www.boatdesign.net /articles/mast-aft-sailing-rig/index.htm   (2259 words)

  
 CHAPTER 4
By changing the rig to either a ketch or a "scetch" rig as shown in Figure 4.2, the centre of effort of the sails is lowered considerably.
However it must be remembered that the sloop rig is carrying all its sail area on one mast and therefore the loads will be higher around the mast, while the ketch and "scetch" split the sail area and therefore the loads on each mast are lower.
The ketch rig is easy to set from a balance point of view, but will result is a higher centre of effort than the "scetch" rig of identical sail area.
www.users.zetnet.co.uk /behemoth/slender/chapter4.htm   (3794 words)

  
 Good Old Boat: The fore-and-aft rig by Ted Brewer
The ketch has her mizzen forward of the rudderpost, and the sail area is comparatively larger than that of the yawl's mizzen, up to 20 percent or more of the total.
As a result, the ketch is slower and not as weatherly as the yawl because the large mizzen is partially backwinded by the main when beating to windward.
Both the ketch and yawl can be balanced under a wide variety of reduced sail combinations in a blow and, to many cruising skippers, thishandiness more than offsets the loss of a fraction of a knot to windward.
www.boatus.com /goodoldboat/foreaftrig.asp   (2377 words)

  
 Cruising ketches : What is cruising ketch : Yacht Council
The ketch rig is often confused with a yawl.
The difference is that the ketch has her mizzen mast forward of the rudder post thus having more sail area, which contributes significant forward propulsion, whereas the mizzen on a yawl is aft of the rudder post and is used primarily to balance the sail plan (and as a riding sail while at anchor).
The ketch is popular among long distance cruisers as the additional sail allows for a better balance, and a smaller more easily handled mainsail for the same overall sail area.
www.yachtcouncil.com /yacht-categories/cruising-ketches.asp   (352 words)

  
 Ketch rig - SailNet Community   (Site not responding. Last check: )
They typcially have a halyard at the forward top of the Mizzenmast and their tack is lead to the deck about even with the base of the main mast.
They are rigged in a number of ways but typically they are attached to a pad eye to weather of the mast base on the deck or even at the rail.
Occasionally you see their tacks rigged to a pad eye at the base of the mast or to the genoa sheet tracks.
www.sailnet.com /forums/learning-sail/1960-ketch-rig.html   (926 words)

  
 Wyliecat Performance Yachts: Wylie 66
The rig is very efficient and transmits energy to the hull smoothly and effectively on all points of sail.
The rig is easier to adjust and the settings work through a wider range of conditions.
You do not have to reef as often, you do not have to work as hard to keep the boat moving, the whole boat (rig and hull) is receiving less load-stress, AND, the shock-absorbing effect translates into a smoother motion through the water, reduced heel and no speed loss.
www.wyliecat.com /yachts/models/wylie_66.html   (635 words)

  
 Aft Mast Sail Power Calculator
Lets call it a marriage between a cutter and a ketch without the main mast, mainsail, booms or a second mast, a unique rig designed to go on a 36' Cross Cruising Trimaran hull, to be used as a shallow draft research vessel around the world in riverine waters and estuaries.
The ketch rig divides the sail area up into more manageable size sails, and it produces a rig with a lower center of effort (less heeling moment) than a sloop of the same sail area.
As the many virtues of this mast-aft rig are evaluated, an emergency situation where all sail must be scavenged immediately with no time to point up into the wind is easily accomplished on any point of sail with this rig.
www.barefootsworld.net /windwalker/aftmastsailingcalc.html   (2166 words)

  
 ketch vs cutter rig - Boat Design Forums
It's also been my experience that the mizzen on the ketch is a very valuable sail at anchor (to stabilize rolling and orient the bow to the wind), and also to get out of tight squeezes under sail (you can back it easy, etc...).
I think the most important aspect when designing the ketch rig is to make sure that there will be enough room between the mainsail and the mizzen to maximize the efficiency of the mizzen.
I hope during this anaylsis to not only determine the basic mast and rigging dimensions one would seek in the ordinary design phase, but to also look with more detail the actual load paths of the forces transmitted to the rig as generated by the sails.
forums.boatdesign.net /boat_design_952.html   (1457 words)

  
 Notes On Acquiring A Yacht
The ketch rig is distinguished by the addition of a smaller mast behind the main-mast.
It is rumored that ketch rigs do not point well to windward, however, and breaking the sail-plan up into smaller packages only makes sense on bigger boats anyway (where the mainsail becomes huge).
These rigs have the potential of offering the most sail area possible on a given length of boat, since it is possible to fly topsails between the masts in addition to the sail area available.
www.blueanarchy.org /yachts/index.html   (2127 words)

  
 Practical Sailor's Review of the Allied Seawind II
The standard rig of the Seawind II is a masthead ketch.
The ketch rig is not particularly desirable for a boat of this size.
This should be used on either the ketch or the cutter, as the old end-of-boom arrangement was only necessary with a roller furling mainsail, which should appropriatly be considered a thing of the past.
www.alliedseawindii.org /a-pracsailsw2.html   (2843 words)

  
 the boatbuilding.community - Design Review No. 1: The Globetrotter 42
The center of gravity of a cat-ketch rig is generally a little lower than that of a stayed rig because most of the strength (diameter and wall thickness) is built in down low where it is needed the most, and then the mast diameter and wall thickness both taper uniformly to the masthead.
In a stayed rig, the mast is almost always a constant cross-section and wall thickness throughout its height (except for any taper at the top end), which means that the center of gravity will be about 45-50% of mast height.
Another neat benefit of the free-standing cat-ketch rig is that the masts can be sealed nearly completely, adding a tremendous amount of buoyancy to the boat in case of a knockdown.
www.boatbuilding.com /article.php/Globetrotter42   (2276 words)

  
 1981 Whitby 42' Ketch
Another highly desirable rig option is the double-head rig, which comes in a ;package with a platform bowsprit and a removable inner forestay.
An attempt to give the 42 a sloop or cutter rig, eliminating the mizzen and lengthening the boom, was not successful; the mast is stepped so far forward that any such modification requires too long a main boom and becomes ungainly even with a bowsprit.
With a high aspect rig and a generous sailplan far her moderate displacement, there is no excuse for the Whitby 42 to be a dog under sail.
www3.telus.net /default/article4.htm   (608 words)

  
 yawl   (Site not responding. Last check: )
The Yawl rig can be seen in every corner of the yachting world and is used to a great extent on pleasure craft.
The classic yawl is a fore-and-aft rigged boat, with the main mast stepped forward and a small mizzen mast stepped in the stern aft or behind the rudder-head.
Today the only way the yawl and ketch differ is in the placing of the mizzen-mast, aft of the rudder-head on a yawl and forward of the rudder-head on the ketch.
www.pielcraftsmen.com /ships/yawl.htm   (193 words)

  
 Pond Skiffs by Simplicity Boats
She is available with a variety of different rigs.
My current favorite rig is a Gaff Ketch, with a gaff main and a sharpie mizzen.
Additional Chameleon sail rigs can be purchased separately which allows you to experiment and learn how different rigs behave - They can also be used in combination.
www.simplicityboats.com /pondskiffs.html   (561 words)

  
 vigor
At least one of the ketches is rigged with a removable inner forestay to yield what you might call a cutter-headed ketch.
Her aft end is cut off short in a transom, a feature that contrasts strongly with the moderate overhang in the bows, but which somehow blends better with the cutter rig than the ketch rig.
The ketch's sail area, at 555 square feet, is enough to provide plenty of drive, even in fairly light conditions, and while the cutter loses area (512 square feet), the gain in efficiency makes up for it.
www.alliedseawindii.org /vigor/vigor.html   (2324 words)

  
 General H-28 Description
ketch's masthead jib's sail area is the same as the original design's.
ketch rig with a masthead jib tacked to a bowsprit.
The rig as designed, with the small stays'l, is 343 sq ft. Using the masthead ("Balloon") jib gives you 443 sq ft. Your bowsprit may add 28-35 sq ft to the sailplan.
www.edgewoodyc.org /h28/genh28.htm   (632 words)

  
 SetSail.com - the serious cruising sailor's website
If you go to a ketch rig, the main mast will have to move forward, and for performance you will want substantial separation of the two rigs (see data on Beowulf and Sundeer in our Offshore Cruising Encyclopedia).
The center of effort of the rig would have to be in the correct position relative to the keel, and cost wise, I doubt you want to mess with moving the keel.
As far as boat size, as much as we love the ketch rig, for a whole variety of reasons, starting with cost and complexity, it does not make sense until you are forced to use it by shear size of the boat.
www.setsail.com /c_central/faqs/faq_rigs.html   (11245 words)

  
 Solway Dory - Balanced Lugsail
We supply lugsails in three sizes: 44, 30 and 14 sq ft. The 44 or 30 may be used on their own to make single masted rigs or either of them can be combined with a 14 sq ft mizzen to make a ketch rig.
The overall centre of effort of the rig is very low indeed even lower than might be expected as the booms don't have to be high enough to see underneath.
The rig is generally supplied as a mainsail of 30sq ft and a mizzen of 14sq ft adding up to the OCSG's 44sq ft. However the sails can be supplied separately.
www.solwaydory.fsnet.co.uk /rigs/lugsail.html   (372 words)

  
 Norwalk Island Sharpie 18 Ketch and Yawl - Michael Storer Boat Design
All the other NIS's are ketches, but the 18 was drawn with a large single mast and a large mainsail for sparkling light wind performance.
After completing the ketch version I realised one of the by-products of the ketch rig is that the geometric centre of the sail area is a bit lower than the original boat.
In this case the mizzen for the ketch version is 4.82 square metres and moving the mizzen aft for the yawl brings it down to 3.3.
members.ozemail.com.au /~storerm/NW18Ketch/NIS18ketch.html   (1315 words)

  
 Sailing Performance question
As I remember it, he designed the 365/424/530 split rig sail plan (I'll omit the 323 for this comment) when large overlapping genoas and thin, tall mainsails were the more common rig de jure for new boats, believing the lower profile and split sail plan would be more easily handled by the small crew.
A sloop or cutter rig may be a better choice, but some people prefer the classic look of a ketch.
The stern attachment point for a sloop/cutter rig on the Pearson 424 occurs at a relatively weak spot in the hull/toe rail.
www.pearson424.org /faq/faq1.html   (1748 words)

  
 Sail Propulsion - Revisiting a Mast-Aft Sailing Rig
My prior 'mast-aft ketch' had elicited notable resistance among members of the conservative sailing community, but I retain that discussion here on the website for those who can't grasp the newest concept of a free-standing, square-rigger.
Truely different sail rig innovations were totally discouraged, and numerous other design innovations were "rated" out of existence by handicap racing rules.
One should give serious consideration to the fundamentals of the ketch as an offshore cruising boat rig,and with this in mind look at the similarities with my rig.
www.runningtideyachts.com /sail   (2467 words)

  
 Sailing Yacht Designs
The sailing yacht designs listed below are arranged in order of their size, from the largest at over 120 feet (a traditional plank on frame wooden ketch) to the smallest at 8 feet (an aluminum sailing pram).
The request here was to design a blue water schooner with an easy to handle rig, a spacious interior and classic styling, then apply modern technology to all of that...!
A classic rig on the finest of single chine hull forms intended for steel or aluminum construction.
www.kastenmarine.com /sail.htm   (1854 words)

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