Finally, the role of the D2s in counteracting or favouring the bend between the first set of spreaders and the masthead. It is adopted by shipyards such as Jeanneau and Beneteau, even for boats without oceanic ambitions. For the Main Im thinking 12mm (larger than either the Colligo and Rigging Doctor calculations) and the largest size of Liros D-Pro-XTR available). In order to confidently specify a replacement for any element of your standing rigging, you will need to know what your existing components are called and how they are measured.Some end fittings have generic names e.g. RM30 is the force that is required to heel the boat over 30 degrees. We are ruling this one out for us. Stainless steel isnot a malleable metal, so the pressure applied by the roller dies is exceptionally high, creating a solid bar of material. If we follow the table they include from Marlow for their DM20 line (Marlow M-Rig Max) then sizing is huge: 11 or 12mm for the Mizzen and 15mm for the main. Adjusting the rigging of a sailboat is less complicated than you imagine. A sailboat's standing rigging is generally built from wire rope, rod, or occasionally a super-strong synthetic fibered rope such as Dyneema , carbon fiber, kevlar or PBO. Runners attachments seen from the mast top Although the mast is made of carbon rather than aluminium, the rig is the same as that of a Mini 650 Pogo2 from Structures shipyard. You're right (I need to think about). By now, I would say, even on cruising boats it is one of the most common rig arrangements. T-terminal and some have more than one common name, but this guide will help you to recognise which ones are correct for your rigging. for my sailboat? From them we get either 7 or 9mm for the Mizzen and 11mm for the main. only hand tools are required for installation, can also be completely disassembled and reused (some models require inner cone replacement) providing great longevity, can be manufactured to very precise tolerances, the waste material can be recycled to create further parts. We would be happy to loan you a tagline (strong and thin) to use as a place holder, or we are always happy to visit your boat and tag it out for you. Its a popular model of Class40, a first generation Akilaria RC1, designed by Mark Lombard, from around 2006. Replacing your turnbuckles. For the moment I wanted to see the mast without no tension in the D2s. Member Album by TANSL | Boat Design Net https://www.boatdesign.net/gallery/albums/member-album-by-tansl.4186/, TANsl https://www.boatscantling-iso-12215.net/, (You must log in or sign up to reply here.). Marlow recommend one thing, Colligo another, they both swear by the logic! [Update]See the first comment below from John Franta, Colligo Marine where he explains the difference between heat stretching at Fibre level (SK78 and SK99) vs at the Braided level (SK75). Global Solo Challenge Copyright 2022. In the Toss method 25% load was used for each lower shroud to match his example. For example, port upper shroud (fig 3) or forestay (fig 1). [End Update]. It can be minimised by keeping static loads as a small % of the breaking strength, so grades of Dyneema with a higher breaking strengths will creep less under the same load. Question: My halyard is binding. Gerr and Toss both note that the lowers get more load than that and when there is more than one each should be capable of handling the full load. Rigging Doctor for SK99: 8mm Main 8mm Stainless: Colligo (SK75): 11mm Marlow from Jimmy Green (DM20): 15mm (but 13mm is pretty close) Rigging Doctor for SK99: 10mm The choices get more tricky as Liros don't make every size (no 7, 9 or 11mm). Whats up? The curvature was accentuated between the first spreaders and the masthead so I went up to the D2s to give a first rough and symmetrical adjustment. As a side note, alot of people have miss-diagnosed constructional elongation for creep. Our calculator is easy and simple to use. That is, the turnbuckles had not been hooked and tightened at the same simultaneously on lower and upper thread. 37K views 7 years ago Jordan freshens up on his high school math to calculate what wire size we should order for our new standing rigging. If you are in any doubt about replicating your existing T terminals, please take some close-up photos with dimensions - the width, shoulder length and overall depth of the T shape. They have been very helpful in responding to email enquiries. Set sail with the benefit of Team Jimmy Green expertise. Sizes .172 to .375 and 4.4mm to 9.5mm. These work laterally to support the mast. If you measure a pre-stretched line before splicing then you can stretch it after and by measuring know if you have removed the constructional stretch. When I run my training centre I used to say that they were not part of the standing rigging but that for good practice we would treat them as such. I replaced 3/16 rigging with 5/16 dynex dux and it's still ok after 10 years. Control Lines: Outhaul - Boom length x 2. Thus your list is not suitable and not providing the correct strength for design allowable limits of mast alloy grades. At this point many of our customers choose to ship their rigging to our shop in Miami Florida where we will duplicate it exactly. For #1, you might be able to lower the keel 1/4 of an inch, depending upon the size of the boat. A high-performance racer might require a lighter, stronger, lower stretch (i.e. The overall shroud load is divided up between your shrouds. Check for anomaliesThe stud terminal on the end of the wire is normally right hand thread, while the bottom part connecting to the deck is normally left hand.We do occasionally come acrossa rig where the thread direction on the existing fittings is opposite to normal.Opposite rotation is an odd featurewhich sometimes occurs with metric thread on some French built mastse.g. Type in the parameters 2. Threaded Bronze Inserts ensure superb adjustment without seizing or galling and the swivel toggle action allows full articulation in two planes. Like your car, your sailboat needs TLC. Make sure your turnbuckle is centered between the studs for accurate measurement. Staying within elastic limits gives safety factors of 2.5, 2 and 1.9 respectively. This is to avoid the unpleasant situation of having a hard time getting to re-attach one. When planning Dyneema rigging the area we have found most confusing is deciding on the size of Dyneema we should fit. But without mast height I suppose this is only partly covering the shroud angle issue? I wish the rope companies made the creep properties easier to find. We start by calculating the designed tension of the shrouds by assuming it is no more than 20% of the breaking strain of the stainless steel. Working the 10M rigging figures backwards can give the safety factor Pearson applied to the 10M. Plus there will be more spare strength if there is UV or Chafe damage. The Bluewave turnbuckle (bottom) is for racing enthusiasts who want to easily adjust settings on the water. The most popular choice is the Stalok version (top) which utilises a chrome-plated, forged bronze body. I ran the numbers for the 10M by methods from three sources starting with David Gerr's book "The Nature of Boats." This means that the threads are not screwed in equally. special care should be taken to ensure that there will be sufficient material left on the tang/eye/plate if youintend toenlarge any holes. As Jimmy Green put it in an email to me In terms of picking between DM20 and DynIce Dux, the choice comes down to whether you want the better performing fibre (DM20) or the better performing rope once braided and heat stretched (heat stretched SK75). With proper measurements (wire diameter, pin sizes, wire lengths), we can give you a very accurate price for the standing rigging itself, but there are often unforeseen complications during the job (bad spreaders, corroded mast bases, hardware that is stripped on the mast, frozen pins, chainplates that are failing, etc.). I might have gone for 9mm if Liros offered that. Is it maybe, just maybe possible that they have cornered the market on synthetic standing, Colligo, Colligo, Colligo. From Marlow Ropes we have this: Others refer to Elastic Stretch, Constructional Stretch and Creep. Standing rigging has been our specialty for over 40 years. For example, for ocean-crossing boats, runners and checkstays help stabilise the mast and prevent it from pumping or bending. With this procedure we were able to restore a situation where the two V1s shrouds were the same length and with the same adjustment. Please read the instructions completely before you start measuring your rig. Taking 70% of the lower shroud capacity gives a safety factor of 3.4. My experience with 2 different 28.5 footers that I have owned is that 7/32" for headstay, backstay, and upper shrouds are very sturdy. If you would like to measure your rigging yourself proceed to step 5. The standing rigging is all rod on this boat. more expensive!) Keeping your existing turnbucklesCheck the thread type (UNF or Metric) the thread size (standard or upsize)and, just to make sure, the thread direction. Excuse me the question, stays should be placed in a "free-standing mast"?. It was clear, however, that we had moved the mast head forward several centimetres and the excess rake was gone. Our riggers can also tune your rig, either at the dock or under sail. The wire diameter Effect of angle on capacity. And word of warning jobs often get expensive because the customer decides, once the mast is down, to add furlers, masthead units, new sheets and halyards, etc. We had no doubts having already simulated the effort with checkstays. We are happy to help you pick the best rope for your application. The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. We do support educated do-it-yourself sailors if you are confident and understand the rigging process. tension them and observe the effect on the mast, which for this type of boats does not have to be significant (Ill come back to this point). Rig designers will calculate the optimum length of the unsupported lengths, or . SCT also includes various modules to perform calculations ISO 12215-6, 8 and 9. Those methods give a guide to sizing the wire for the 10M. Photos will help, but detailed dimensions are essential to ensurecorrect identification.If practicable, send a sample fitting or wire stay to the Jimmy Green Rigging Team.We can then relieve you of the responsibility by positively matching your existing terminal to the correct replacement. On DayBoats, Trailer Sailers and small yachts, a standard 1x19 wire can be bent around a stainless-steel thimble and Talurit pressed into position using a copper ferrule. Also Marlow describes them all and includes comparison charts. Remove any pins from your terminal ends before taking measurements. To calculate the load on a particular sling leg proceed as follows: Take the total weight of the load and divide this by the number of legs supporting the load. We removed two more turns from the V1s and took them back at the forestay. Having to remember this T-bone day and night in every situation is not the best of proposition. Continuous rigging is made up of single pieces of wire that run from the top of the rig to the deck allowing the tuning to be done at deck level. On a Mini 650, to avoid too many lines, and with a boom that weighs a few kilos, nothing replaces the topping lift. Tuning is required at each spreader level due to the wire terminating at each spreader tip. The initial task is totake some basic measurements.A good tape measure combined with a good eye may be sufficient, but vernier scale calipers will guarantee an accurate result.Digital versions are now available at a very affordable price and they make the process very simple to read and record. Measure your wireIt is important toestablish the diameter of your wire becauseall the different types of wire terminationare manufactured with specific dimensionsfor each diameter. For example, when setting the runners, it was noticeable that the working points of the control lines had moved by about 20cm. Rust and discoloration can indicate the location of a crack or crystallization of the metal. We are confident that you will look forward to our emails. The t-bone extra adjustment will not give you extraordinary gains and advantages upwind as theres only so much extra bend you can put in with a runner and loose checkstay. If your design includes lashings (which are normally setup to have plenty of adjustment) then there is only the inconvenience of a tightening a few times initially if you didnt get rid of all the constructional stretch. My personal opinion is that when offshore racing it is best to avoid easily avoidable risks. This explained why the mast started veering to the left. Still, as we will be doing the splicing ourselves, it isnt the end of the world if we need to shorten the shrouds once or twice in their life. Both SK90 and SK99 are heat stretched at the fiber level so that makes them a little more difficult to heat stretch completely at the braided line level. If you put your hands on the standing rigging without following a sequence and without knowing what you are doing, you end up like a dog chasing its tail. Lets consider the mast of a Class40, with two orders of swept back spreaders and its standing rigging. It was time to move on runners and checkstays to decide if something needed changing. Balancing the risks and benefits, at the end of the day, on my boat I decided to eliminate the T-bone and seek for a medium setting. That's a little high because it's using the combined capacity of the lowers and reality will have them loaded differently. Jimmy Green have 100m drums of 8mm in all 3 types of Dyneema from Marlow: Marlow Excel D12 Max 78 (SK78) is 1,145Marlow Excel D12 Max 99 (SK99) is 1,400Marlow M-Rig Max (DM20) is 1,337, LIROS D-Pro-XTR (SK99) is 868LIROS D-Pro Static (DM20) is 1,140, The Hampidjan (recommended by Colligo) 8mm rope is. The direction of the thread is only of vital importanceif you are planning to change the stud terminal, but keep the existing turnbuckle.Take a close look at the two different threads in the picture below.Thehigher sidedenotes thedirection of the thread. The cost to replace standing rigging obviously varies from boat to boat. After attempting to sort through the many personal. I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. Finally, should you decide to sail with that old rigging, consider checking out the Ask the Rigger article titled Rigs Fail Are You Ready? at http://rigworks.com/rigs-fail-ready/. Can you break it down for me? So we are looking at approx 9300kg breaking strain Dyneema. For example, many chainplates are too thin to grip clevis pins correctly. Overall, if you think you have a part that is not listed here, email a photo to the Jimmy Green Rigging Sales team and we will take a look. Check the thread size (standard or upsize) Select a turnbuckle which provides articulation e.g. But the disadvantages are cost (not just the line but also the thimbles) and windage (but we have a big boxy wheelhouse so are not exactly aerodynamic). But I have seen many badly adjusted masts and not by just a little. I.e., that the problems were only in the adjustments of the turnbuckles. At the same time, by vertical compression of the mast, tensioning the backstay causes a bending of the mast that flattens the main. standing rigging size calculator. When measuring rigging, the convention is to measure from pin center to pin center or from bearing point to bearing point. Reefing Line (reef 2) - Boom length x 3. You may need to apply pressure to stretch the wire straight, you may find it helpful to use a line or block and tackle. You can use a large nail or screw on the dock. Forged:Some Petersen Stainless terminals are manufactured using a process known as electrical upset forging.The electrical current used internally aligns the grain structure of the stainless steel.The result is a stronger, lighter fitting that is also more resistant to loading fatigue.The picture shows a machined eye (top) which is slightly larger than the relatively minimal forged eye (bottom) for the same size wire. iPhone. On a boat like yours with single uppers and double lowers, the uppers see about 45% of the load and . Still the biggest name that we have found producing fittings for Dyneema rigging. Yes, doing it yourself will theoretically save money. Make sure your turnbuckle is centered between the studs for accurate measurement. We are not experts but just trying to show our thinking processes. This also serves as your pin center measuring point. Looking at the mast from the side you could see a beautiful shape without irregularities that gently curved back. Driscoll Boat Works and Shelter Island Boat Yard are both within walking distance of Rigworks. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. I have an older Hallberg Rassy 35 (yep, thats the new challenge) - and currently the rigging appears to be 5/16" wire (that's what the local rigger measured, it seemed slightly smaller to me but he probably does a better job at measurment). Imagine bearing away, removing the genoa and hoisting a large spi. Below are some rough guidelines to help you make an educated purchase. Consider pulling your rig every 5-6 years to inspect the mast base, chainplates, turnbuckles, wire, etc. You can use the righting moment and rig geometry to calculate rig loads. 1. All the vertical tension turned into compression and bend. Thanks John. When the T-bone is undone, the runnner has more relative tension than the checkstay as by undoing the T-bone we have effectively lengthened the checkstay. From the Rigger: First, if your old rope served its purpose but needs replacing, we recommend duplicating it as closely as possible to ensure that the replacement is the correct length and works with your existing clutches, winches, etc. Others, such as Mr. E.Sponberg, make other distribution of forces. 5 languages options can be chosen: English, Spanish, French, German and Portuguese. Their page (from 2015) Before Ordering Your Colligo Dux Rigging links to a PDF table for sizing. Unlike the Gerr formula the RM30 formula accounts for shroud base width. The simplest and quickest way is to use a rig-tension meter, such as the Loos gauge. On boats with swept back spreaders, runners and checkstays are not structural. After this introduction, lets move on to a practical case. To fix a mast like this, with multiple problems, you need to have a method to get to a satisfactory result. This type of rig is fitted with a runner at the mast top and a checkstay at the height of the inner forestay. To reduce the bend we had to reduce tension of the V1s but also monitor the tension of the D1s. Write down the number and move on to the next stay. Not only will your rig last longer when properly tuned, your boat will sail better, and who doesnt love that! Therefore, except in exceptional cases, starting from this assumption is more than reasonable. We had no option but to intervene by shortening the forestay, which in this case was adjustable. For a rod of the size we were adjusting we needed a large and very expensive tension measurement tool. All in all it will probably only change your solent to staysail switch point by a knot of wind or two. Everything was in order throwing in a few tacks confirmed that the boat made sailed the same angle to the wind on both tacks. It also has a module for calculating continuous beams and large facilities for manage the various materials used in the construction of modern boats. With this expedient you can shorten the checkstay relative to the runner to the point that you set the checkstay and the runner remains effectively loose. This is especially important for the forestay attachment if it is an integral part of the stemhead fitting. We deal directly with the manufacturers of the sailboat standing rigging components that we sell, and we know the product because we use the product. With the boat in the water and not wanting to take any risk, we didnt want to get to unhook any turnbuckle. They are not included in our estimate. The mast of the Class40s are, pass me the term, quite ignorant, and dont it is not about fine tuning that last half turn. Global Solo Challenge Copyright 2022. When riggers cut rigging in the workshop they are very unlikely to make pairs of shrouds of different lengths. So we measured the total length of the left and starboard turnbuckle system for both the vertical shrouds (V1) and the low diagonals (D1). The benefits are less windage and less weight aloft. The first is the RM30 heeling test to calculate rig loads. The inner forstay and the staysail come up in about 16 knots of wind. One method of seeing this is to take a piece of Dynice Dux (SK75) and cutting it with a very sharp knife, you will get what looks like a single line made up of 12 cells, it holds together that well. Replacing your turnbucklesCheck the thread size (standard or upsize)Select a turnbuckle which provides articulation e.g. This system with T-bone on the checkstay give you maximum flexibility and is obviously suitable for those who know how to use it. With a masthead rigged boat, the backstay can be used to increase forestay tension in high winds. We have also said that the mast of a Class40 is not quite so bendable and adjustable. This is possible because the rod shroud is free to rotate inside its T-Cup at the spreader. 1/4" is usually 7/16" or 1/2". The line is also lighter and it doesn't absorb water, as compared to Vectran. Taking into account boat length and sailing style, the attached chart suggests rope diameter and type for each piece of running rigging: Rope Diameter and Type. The spreaders are not perpendicular to the fore-aft axis but swept towards the stern on the horizontal plane. For an average 40-foot boat, Cockerill estimates about $100 per foot to re-rig with wire rigging ($4,000), as well as the round-trip cost to haul and launch the boat and unstep and step the rig (an additional $2,500 or so). 10M OEM Rigging Wire Headstay Backstay Upper Shroud Lower Shroud Size 3/8" 3/8" 5/16" 9/32" So is the rigging over-sized on the 10M? The distance between the hole and the top of the fitting - check that the new fork fitting has enough depth to accommodate the chain plate without obstruction. In our case it was evident that the port turnbuckle had many more turns than the starboard side, compared to the thread of the V1 above. But I mean, why dont hey have prices listed on their site?! Add that amount for each splice (it won't amount to even 36 feet in either case), plus the distance around the thimble. The tension of the low diagonals D1s controls the angle up to the first set of spreaders of the overall curvature that the mast takes up to the masthead. Since you're doing lashings, an inch either way won't matter: what's more important is cutting all your lowers the same length so the deadeyes all line up and look symmetrical. For safety and peace of mind, however, sailboat chainplates require attention and possibly upgrading. Then we choose what percentage of the breaking strength of the Dyneema we want this to be. My understanding is if you allow for this and pre-stretch your stays you can reduce the need for re-splicing. If you need to replace a halyard, please dont pull it out of the mast. directly with the yard of your choice. We progressively lengthen the checkstay lashing until we get to a setting where, when tightening runner and checkstay there is a similar tension on both. The mysteries of sizing Dyneema standing rigging. Or maybe a lot of other boats are under-rigged? The forestay turnbuckle in this case, and like on many other boats, was inside the furling drum. The overall rake was still excessive. Swaged terminals are manufactured using 1 or more of the 4 processes listed above. T-terminal is a generic term for all the different forms of shroud attachment favoured by mast manufacturers, both current and historic - T, T-Bar, Flathead, T-Ball, Stemball, also known as Elephants Foot, Stemball with Cup, Spoon and Shroud terminalare all variations on this theme. Despite that, they do all agree that Dyneema needed to be sized for Stretch rather than for Strength. The top terminals that attach to the mast vary according to the origin (manufacturer) and the age of the mast.It is also important to bear in mind that there may have been some significant alterations since your yacht was first commissioned.The basic formats for swaged ends are Fixed Eye, Fixed Fork and T-terminal. The picture below shows the most common rigging terminals used at Jimmy Green Marine.From left to right, Talurit Thimble Eye, Fixed Eye, Shackle Toggle, Stud, Stemball (Elephants foot), Toggle Fork, the toggle fork on the bottom of a rigging screw, Fixed Fork, Hamma Spoon, and Flat Head. I therefore decided to tighten further the D1s by a turn and the D2s by two. Im least concerned about Constructional Stretch or bedding in. 50 or so lbs up in the air, which translated to 200 less rail meat lbs! chunkier appearance than forged parts because the internal grain of the material remains parallel, requiring some faces to be longer to retain strength. Those details about the differences of heat stretching at Fibre vs braided level are hard to come by. Using Colligo's stretch calculator it looks like I should go with 5/16 and 1/4" Dyneema respectively. Designers typically specify standing rigging and attachments, including bolts, that are 1.3 to 1.4 times stronger than the calculated load. It provides some tables of the most common suppliers of slings and shackles, but the user can add its own tables. I hear about these guys on every forum everywhere. At Colligo Marine, we have now rigged more than 900 boats around the world with our brand of engineered standing rigging and have learned alot from this experience. The second is a calculation based on the current rigging size. One seemingly easy option is to over-size. Stretchy is slightly problematic because there are multiple forms and the terminology used isnt consistent. Once on deck I noticed that the mast was much better already, the forestay was tighter, even though we hadnt touched the V1s at all. Want to prolong the lifespan of your rigging? From the Rigger: First, if your old rope served its purpose but needs replacing, we recommend duplicating it as closely as possible Read more, http://rigworks.com/maintaining-your-standing-rigging/, http://rigworks.com/wp-content/uploads/2016/03/Standing-Rigging-Care.pdf, http://rigworks.com/the-scoop-on-rig-inspections/.
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