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Calculate the length of bury. One seemingly easy option is to over-size. Since it was not me who had mounted the mast, I could not be sure that the turnbuckles had been inserted correctly, i.e. rope), you will want to consider length, diameter, stretch/performance, material/construction and, of course, price. This can be estimated with the boat's beam, ballast, draft, and displacement. In terms of suitability for us, we have got that down to this list of basic Dyneema variations (we havent found a comparison between the different ways of treating the same type of Dyneema): Rigging Doctor describes all these (and others that we are not considering), not much has changed since that was written in 2015 apart from the gradual introduction of Bio-based Dyneema (expected to reach 60% of all Dyneema by 2030) and a reduction in the premium pricing for DM20 and SK99. I jibed without runners in 50 knots of wind and nothing happened. We repeated the exercise for the low diagonals D1s. 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. What does all this mean? One thing I would like to add is the reasoning behind using Dyneema SK75 that is heat stretched for standing rigging Vs the new chemistries like SK90 and SK99 that are heat stretched. A UK Chartered Engineer and Fellow of the Institution of Mechanical Engineers he has, since 2001, managed the rigging engineering group at Bechtel. standing rigging size calculator Archives. This turnbuckle features calibration, one extra-long stud and a fold-out arm to facilitate easy adjustments. Sort by: Herb suggests under 15% or even better under 10%. I hear about these guys on every forum everywhere. The picture below reveals the variation in thickness and head angle to the swage. Discussion in 'Software' started by TANSL, Feb 11, 2016. With a bent mast the first thing really is to understand was why it is so. 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). Does anyone know if 5/32" is the factory size? To do this we tighten the runner with the checkstay lashing very short to start with. This translates into a less dense braided product that produces more constructional elongation when put under a constant load, like pretension in your rig. As you size up creep and stretch will always be reduced. A customer came into our shop the other day to discuss his 33-year old rigging. It is important to do this while the mast is still up and set for normal sailing as this will be the base line to produce your new rigging. So, I resorted to trusting my sensorial memory. Question When should I replace my standing rigging? Condition of sling - passes all inspection criteria. Having to remember this T-bone day and night in every situation is not the best of proposition. The boat was in the water, we first had to avoid the risk of unscrewing a turnbuckle and accidentally unhooking a shroud. The Supajust Eye Toggleand Swage (bottom) is a high specification stainless steel open body turnbuckle. T-terminals or shroud terminals often provide the most difficult decision.There are t-terminals on the market such as the Sta-lok and OS/BSI varieties which are sometimes referred to as universal.This means that they aredesigned to fit a variety of different backing plates, and they may well prove to be a useful resource if your existing terminals can't be replicated.However,it is bestto match the t-terminal to the mast backing plate from the same manufacturer.The thickness and width of the head,as well as the angle of the load bearing 'shoulders', are all critical factors in selecting the correct version. It is adopted by shipyards such as Jeanneau and Beneteau, even for boats without oceanic ambitions. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. So we can put back the T-bone that shortens checkstay and use it as a counter cable for the inner forestay. As said, the backstay is simply not there, to make room for the square top mainsail. Question: My halyard is binding. This will be true for all three of your reef points. Some say 52 diameters, other prefer 72 diameters. The wire is inserted into the hollow terminal and pulled through a set of roller dies. Check the deck around the chainplates and mast for cracking and delamination. Rust and discoloration can indicate the location of a crack or crystallization of the metal. 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. You may need to apply pressure to stretch the wire straight, you may find it helpful to use a line or block and tackle. Most lines are pre-stretched. If they are both too tight the mast becomes straight like a telegraph pole losing its beautiful shape. Deckvests need to be maintained so that Read more, Genoa Halyard (fractional rig) Mast length x 2, Spinnaker / gennaker halyard Mast length x 2.5, Main Sheet Boat length x 2.5 (varies with the mechanical purchase being used), Asymmetric Spinnaker Sheet Boat length x 2.5 to 3, Reefing Line (reef 1) Boom length x 2.5. So the rake is controlled by adjusting the stay length and the V1s. We also attached spinnaker halyards one to the left and one to starboard to an eyebolt. If you need to replace a halyard, please dont pull it out of the mast. Is it maybe, just maybe possible that they have cornered the market on synthetic standing, Colligo, Colligo, Colligo. Heat stretched SK75 really performs better under a constant load. Why not schedule annual service as you would with a car? 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. A boat with bad rigging is at best a pain in the #@$ and at worst a lethal weapon. Rigging Math | SailNet Community See other options in diagram to the right. I need to do some more study and number crunching. That has two ways of calculating the size. Despite the absence of a backstay its not runners or checkstays that keep the mast up. Sounds interesting regardless. Staying within elastic limits gives safety factors of 2.5, 2 and 1.9 respectively. Doubt if your chain plates would take 1/2". Standing Rigging CalculationBack to Rigging By appearances the 10M is a very heavily rigged 33 footer. Forum posts represent the experience, opinion, and view of individual users. You agree that your ultimate purchase and use of Lift-All slings must be determined by you to be appropriate for your specific applications. The wind was not much but enough to load the mainsail close-hauled and verify that the mast remained straight. This yields a shroud load of 6,000 pounds. At this point many of our customers choose to ship their rigging to our shop in Miami Florida where we will duplicate it exactly. So these are the sites Ive found most useful in working sizes for our boat. Once the wind increases and we take the first reef, the runner is no longer needed (especially upwind). There are additional developments of these three concepts: T-terminals areperhaps the trickiest identification recognition issue that you will face and it is also extremely important to get it right, so that your new terminals seat properly in their appropriate mast slot.The fittings may look similar, but if they are not specified correctly, theymay not fit the slot properly.Even though it may not immediately be apparent, incorrect seating can lead tostainless steel fatiguewhich, in turn, may cause premature failure.If your existing fittings don't seem to matchthe replacements that are available, it will be prudent to fit new, matching plates on the mast. The only downside to Dynice DUX is that it is quite stiff when new, and will take a few days of sailing to soften up. After this introduction, lets move on to a practical case. It is your responsibility to assure that the slings you use are appropriate for your application. Unfortunately, there are not always visual clues that your rigging has passed its life expectancy. These guidelines are particularly useful when estimating the cost of a project. Can Galvanised Steel be used with Stainless Steel? All rights reserved. For an idea of the costs involved to replace your standing rigging, here are some examples of sets of rigging we have made for customers in the past 12 months (prices as of Sept 2022). We wont be re-rigging the main until after the 2021 season so have plenty of time to measure properly. He said it looked fine. Your email address will not be published. Boat Design Net does not necessarily endorse nor share the view of each individual post. 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. Could someone please speak of the advantages / disadvantages of increasing the. In this article we will deal with the tuning of standing rigging of a typical sailboat. Lets be very conservative and assume we are looking at existing stainless 6.5mm for the mizzen and 8mm for the main (will check as soon as we are allowed to visit the boat). It is based on our specific boat and shares our thinking for our uses. 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. Asymmetric Spinnaker Sheet - Boat length x 2.5 to 3. Graham Radford Yacht Design, STABILITY DISCUSSION, total shroud breaking strength (1.2 * disp). By now, I would say, even on cruising boats it is one of the most common rig arrangements. Our preferred rope supplier, Jimmy Green Marine, has lots of information and a range of Dyneema for standing rigging from different suppliers. Still the biggest name that we have found producing fittings for Dyneema rigging. The tension gauges are especially designed for accurate, repeatable tuning of a sailboat's standing rigging. To bring everything back to zero tension, I went up to the first set of spreaders and loosened the D2s which I would then adjusted last. Rig designers will calculate the optimum length of the unsupported lengths, or . You can use a large nail or screw on the dock. Historically, the most traditional rig type is the masthead one. To fix a mast like this, with multiple problems, you need to have a method to get to a satisfactory result. We gave the forestay one more turn and removed a turn from the V1s and we were satisfied. How To Identify and Specify Your Standing Rigging Components - Jimmy Green Check your spreaders, chainplates and turnbuckles for cracking, fatigue, missing cotter pins/rings, etc. They show up on your doorstep ready to use. Cruising boat rigs can have up to three pairs of spreaders, depending on a number of factors, including the boat's size and type. On a Mini 650, to avoid too many lines, and with a boom that weighs a few kilos, nothing replaces the topping lift. The righting curve is fairly straight line from 0 to 35 or so and the rate is actually decreasing so using the 716 lbs/degree will give a slightly high value at 30 degrees which is nicely conservative. To preserve the left-right adjustment symmetry, we unscrewed the V1s turnbuckles two full turns each side. Threaded Bronze Inserts ensure superb adjustment without seizing or galling and the swivel toggle action allows full articulation in two planes. Get the full sizing and inventory of: - the standing rigging - the running rigging - the mast section with weight and size - gravity center localization - and mast tuning report 4. This is to avoid the unpleasant situation of having a hard time getting to re-attach one. That said, runners and checks play a very important role in stabilising the mast and reducing its stress. Running rigging - SailboatOwners.com We have chosen a Class40, a sister-ship of the boat with which I competed in the Global Ocean Race 2011/2012. With a masthead rigged boat, the backstay can be used to increase forestay tension in high winds. However, in long race, especially single-handed, offshore, it has some human contraindications. There is nothing more expensive than a cheap boat! This is mostly a problem if you only use turnbuckles due to their limited range. There is no backstay at all, which is common on many modern boats. increasing and consolidating standing rigging size Their role is not simply to contain the main when dowsing it. This is because upwind mast is fully loaded at just 15-16 knots after which you need to reduce sail. Lets consider the mast of a Class40, with two orders of swept back spreaders and its standing rigging. Chainplates 101: Inspect and Refit | Cruising World In the Toss method 25% load was used for each lower shroud to match his example. 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. Effect of angle on capacity. Before tightening the forestay, however, I wanted to loosen the the V1s a little so as not to induce further compression in the mast. All the vertical tension turned into compression and bend. For the moment I wanted to see the mast without no tension in the D2s. The standard seems to be 2.5 to 3.0. The Hamma Spoon and Petersen Shroud terminals are designed as direct replacements for the discontinued Navtec T-terminal. Give us a call, and we can give you a rough quote. 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). Keeping your existing turnbucklesCheck the thread type (UNF or Metric) the thread size (standard or upsize)and, just to make sure, the thread direction. Stainless steel isnot a malleable metal, so the pressure applied by the roller dies is exceptionally high, creating a solid bar of material. 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. The numbers in the Toss and Henderson calculations were for a 2.5 safety factor. 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. 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. Replacing your turnbucklesCheck the thread size (standard or upsize)Select a turnbuckle which provides articulation e.g. Our preferences are going to be to tune the rig for a bit higher performance and sail a bit harder than they do but it is still be best source of information we have found. 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. So we measured the total length of the left and starboard turnbuckle system for both the vertical shrouds (V1) and the low diagonals (D1). For decades now, however, fractional rigs with swept back spreaders have been increasingly widespread. I therefore decided to tighten further the D1s by a turn and the D2s by two. We highly recommend you hire a professional rigger if you are not familiar with this process. How to use Tension Gauges - Loos & Company, Inc. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. Re-rigs - Petersen Custom Rigging The listed prices for standing rigging by model reflect the rigging shown in our diagrams. 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. If these are too soft the mast will sag to leeward between the first spreader and masthead. 50 or so lbs up in the air, which translated to 200 less rail meat lbs! Looking at the mast from the side you could see a beautiful shape without irregularities that gently curved back. 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. 1x19 Wire Rigging Stainless Steel 1x19 Wire Rope Rigging is the most popular solution for standing rigging on cruising yachts. Find a flat surface large enough that you can fully stretch your rigging out for measurement. 1. The choices get more tricky as Liros dont make every size (no 7, 9 or 11mm). Having worked and checked with runners and checks the sea trial was more for the pleasure of ending the day with some sailing. It is important to understand the influence of stay-V1 on the rake. 119 316 grade stainless steel Wire Rope (1 group of 19 wires, very stiff with low stretch) is standard on most sailboats. The de-multiplication of the runner pulleys obviously amplified the effect on the control line. Take your measurements from pin center to pin center as seen in the diagram. Check the thread type (UNF or Metric) the thread size (standard or upsize) and, just to make sure, the thread direction. The overall shroud load is divided up between your shrouds. That is because a Dyneema line the same strength as the Stainless Steel it replaces would be too stretchy to work. Unfortunately lots of the information isnt clear about which they are referring to in their guidance. Our calculator is easy and simple to use. Remove any pins from your terminal ends before taking measurements. 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. 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. If your running rigging leads back to the cockpit, remember to account for that in your length. 5 languages options can be chosen: English, Spanish, French, German and Portuguese. Check the thread size (standard or upsize) Select a turnbuckle which provides articulation e.g. SCT also includes various modules to perform calculations ISO 12215-6, 8 and 9. Finally, the role of the D2s in counteracting or favouring the bend between the first set of spreaders and the masthead. We have a huge rope wall at Rigworks and are very proud of our selection and expertise. 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. I.e., that the problems were only in the adjustments of the turnbuckles. Perform routine cleaning/polishing to remove corrosives, identify chafe points and other damage, and properly tune your standing rigging (shrouds, forestay, backstay). 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. a toggle fork at the bottom end. Jimmy Green Marine commonly supply 3 types of rigging screw for standing rigging.These are sometimes referred to as bottle screws or turnbuckles. 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. I have to study the correct way to approach this problem. The checkstay, on the other hand, usually points where the foresail forestay attachment is located. Running Rigging Calculator - SailboatOwners.com Driscoll Boat Works and Shelter Island Boat Yard are both within walking distance of Rigworks. How to Measure Standing Rigging - Sailing Services 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. He is the engineering, construction and project management specialist company's chief rigging engineer. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. Using a fiberglass or steel tape measure, measure the distance from pin-center to pin-center or bearing point to bearing point as applicable. Seldn estimates the main reef clew force to MSL (maximum in service load)=5.5kN, the reef tack load to MSL=3.5kN (10 Newton=1 Kg f). As posted above it seems like synthetic standing rigging is still the wild west. Attachment to the deck, the bottom terminalsDecide whether you are going to replace the turnbuckles (rigging screws) or just the end terminals.If the turnbuckles are the same age as the rest of the standing rigging, or they show any signs of fatigue, it will be prudent tostart afresh with all new components. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. RIGGINGS AND MASTS CALCULATIONS ONLINE RIGGINGS AND MASTS FREE DATABASE: Just in 10 minutes! Check that everything is straight and true. Both operations improve upwind performance. This T-bone, if forgotten closed, supports the mast only at the level of spreaders, leaving the masthead free. A high-performance racer might require a lighter, stronger, lower stretch (i.e. On this Class40 the runner was attached to the first pulley and therefore its length was a given and could not be adjusted. Can you break it down for me? In the design of the Dyneema chaimplates I mentioned sizing them up, but of course the line is doubled so Ill use the same size for the chainplates as for the shroud/stay attached to them. Z-Spars, Isomat.Opposite UNF thread is very rare and will entail changing the whole turnbuckle to avoid a bespoke solution. We have also said that the mast of a Class40 is not quite so bendable and adjustable. By giving the D1s a few symmetrical left-right turns we were able to straighten the lower part of the mast. The spring-loaded ones suitable for adjusting the shrouds of a Mini 650 are useless. 20% is 576kg so if we size at the 10% we get 5760kg (we can simplify the calculation to looking for a Dyneema line that is at least twice the breaking limit of the stainless it replaces). Mast and Rigging calculations | Boat Design Net The terminations for wire vs. rod can be quite different and require a lot of customization. For 6mm stainless steel the breaking strength is 2880kg. Although we work closely with the boatyard during the job, you will need to negotiate yard fees (crane, mast lay days, etc.) Here are a few suggestions. The lazy rigger screws the turnbuckle on deck a few turns so that he has only to hook the vertical shroud, the V1. The rake shifts the sail centre aft and the bend in the mast flattens the sail, both of which we do not want in light winds. They make the information from manufacturers such Marlow rather more accessible. That is, it is no longer one of the elements of the standing rigging (albeit adjustable). This should be a warning. Having said that, even with SK75 creep is easy to design around if you know the creep properties for the material you are using. The second is a calculation based on the current rigging size. Selecting Rope - Length, Diameter, Type - RIGWORKS INC. a) we need to replace the mizzen rigging before we launch b) there is no dock or anything at the boatyard so difficult to do c) Im not sure how this would work for a mizzen mast as it is shorter and so far aft, therefore it would be very difficult to heel the boat that far with just the mizzen and not very typical of the mizzen usage. Global Solo Challenge Copyright 2022. When planning Dyneema rigging the area we have found most confusing is deciding on the size of Dyneema we should fit. 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. This meant that the V1s tension encountered no resistance to mast compression. Cunningham - Boom length x 1. The spreaders are not perpendicular to the fore-aft axis but swept towards the stern on the horizontal plane. 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/. How to calculate the necessary support under a crane We also set runners and checkstays just for safety. It does seem like some competition is popping up here and there for dux. Then it made a bend to the right and then back to the left between the second set of spreaders to the masthead. Heat stretching is a bit like work hardening so if the fiber is already work hardened then the heat stretching at the braided level does not produce the Densest braided structure that you can get if the Dyneema fiber is not heat stretched before braiding. If you can get the cap, Colligo, Colligo, Colligo. Standing rigging Definition & Meaning | Dictionary.com Maybe I was being a bit hyperbolic when i said that dude was 3x the amount of competitors. Differences emerged immediately, the D1 on the left was about 1cm shorter than the one on the right. In this case the forestay does not reach the masthead but only up to seven eighths or nine tenths of the mast height and so do the attachments of the shrouds. Using Colligo's stretch calculator it looks like I should go with 5/16 and 1/4" Dyneema respectively. For more information on rig maintenance, visit our prior Ask the Rigger article at http://rigworks.com/maintaining-your-standing-rigging/ and download our rig-care pamphlet at http://rigworks.com/wp-content/uploads/2016/03/Standing-Rigging-Care.pdf. Hi Dave, Thanks for your very thorough synopsis of using Dyneema for standing rigging. And yet I have read that once stretched to its working load, regular Dyneema will stabilize and then experience even less creep than DUX. Many people believe that only heavily used rigging needs to be replaced, but the continuous flexing of loose wire that is not under load can take a serious toll as well. The mast of the Class40s are, pass me the term, quite ignorant, and dont it is not about fine tuning that last half turn. So unless you had to do a short inshore event with light airs predicted changing the setting for each and especially longer races makes no sense. 3000 # is not enough to get rid of constructional stretch, and you would need to sustain your load over time. 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. Thethickness of the chain plate - check that the new fork is wide enough to fit over the chain plate, but not so wide as to cause a pinpoint load or allow too much lateral movement. Whats up? Standing rigging: step by step guide on how to tune it on your sailboat Consider pulling your rig every 5-6 years to inspect the mast base, chainplates, turnbuckles, wire, etc. This was not the case before, with a perceptible difference of several degrees. I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. Lay out the wire and attach one end of your wire segment to a secure fixed point. Speaking of standing rigging we have to open a parenthesis on the types of rigs possible for a sailboat. Lets go up whenever there doubt. It was clear, however, that we had moved the mast head forward several centimetres and the excess rake was gone.