See other options in diagram to the right. Each complete turn corresponded to approximately 3-4 millimetres in length. In fact, if the D2s had been too soft, when tightening the checkstay the mast would bend to windward. The list of materials and design stresses are those that ISO 12215-5 standard says that can be used. Boom Vang - Boom length x 2. I'm a little confused. there is no M11 size. standing rigging. Seen from the side, the mast showed excessive rake and pre-bend that needed correcting. So 716 * 30 gives an RM30 of about 21,500 lbs. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. Unlike the Gerr formula the RM30 formula accounts for shroud base width. If they are not willing to take the financial risk, are you willing to risk yourself and your crew? Graham Radford Yacht Design, STABILITY DISCUSSION, total shroud breaking strength (1.2 * disp). This explained why the head of the mast pointed to the left after the initial bend. On boats with swept back spreaders, runners and checkstays are not structural. 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. 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. 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. The spreaders are not perpendicular to the fore-aft axis but swept towards the stern on the horizontal plane. I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. 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. The de-multiplication of the runner pulleys obviously amplified the effect on the control line. Everything was in order throwing in a few tacks confirmed that the boat made sailed the same angle to the wind on both tacks. The simplest and quickest way is to use a rig-tension meter, such as the Loos gauge. 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. Save my name, email, and website in this browser for the next time I comment. If you have any questions, please dont hesitate to call or email us and we would be happy to help you. 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. Taking V1s and D1s and shaking them, hitting them, you get a feel for their. for my sailboat? The standard seems to be 2.5 to 3.0. The Supajust Eye Toggleand Swage (bottom) is a high specification stainless steel open body turnbuckle. The backstay is both an element of the standing rigging but can also be tuned. Usually they are made with dyneema and not just simple polyester. At the same time, by vertical compression of the mast, tensioning the backstay causes a bending of the mast that flattens the main. If in doubt, get a professional opinion. Please call us at 1.888.535.7326 if you need a quote for standing rigging not listed on our site. Check that everything is straight and true. I have to study the correct way to approach this problem. The IMS data shows a righting moment at 25 degrees of heel as 716 lbs/degree or 17,900 lbs. This is especially important for the forestay attachment if it is an integral part of the stemhead fitting. Remove any pins from your terminal ends before taking measurements. The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. Discontinuous rigging is made up of shorter sections of wire that connect to each other at the spreader tips. On a boat like yours with single uppers and double lowers, the uppers see about 45% of the load and . The original spec. Reefing Line (reef 1) - Boom length x 2.5. In this article we will deal with the tuning of standing rigging of a typical sailboat. The above will give a total minimum weight on each leg of the sling of 2,000 pounds divided by 2 legs or . Lower Fore St, Beer, East Devon, EX12 3EG. So I am going to be adding Hampidjan DynIce Dux into my calculations and it is cheaper than the LIROS D-Pro-XTR, plus available in more sizes. Threaded Bronze Inserts ensure superb adjustment without seizing or galling and the swivel toggle action allows full articulation in two planes. If you cut heat stretched SK90 or 99, you will get 12 strands that fall apart. standing rigging size calculator. Sounds interesting regardless. Get regular rig inspections! On this boat only the V1s on deck are adjustable, the rest of the shroud is of fixed length. Good question. First, we multiply the load by 1.5 to approximate the rest of the righting moment beyond 30 degrees, and divide by half of your 10-foot beam. I hear about these guys on every forum everywhere. Our calculator is easy and simple to use. After attempting to sort through the many personal. The boat was in the water, we first had to avoid the risk of unscrewing a turnbuckle and accidentally unhooking a shroud. To preserve the left-right adjustment symmetry, we unscrewed the V1s turnbuckles two full turns each side. So in all fairness, I was trusting my eyes. A change of about 1.5cm that was well noticeable at a height of 20 meters. Heat stretched SK75 really performs better under a constant load. Cruising boat rigs can have up to three pairs of spreaders, depending on a number of factors, including the boat's size and type. All standing rigging is manufactured right here in our rigging shop -- the way it's been since 1984. In our search we have found three sites particularly helpful. Unfortunately lots of the information isnt clear about which they are referring to in their guidance. There is nothing more expensive than a cheap boat! Then we can help you fine-tune your rope selection and length before cutting. The listed prices for standing rigging by model reflect the rigging shown in our diagrams. We had no doubts having already simulated the effort with checkstays. Of course, you are welcome to label all your rigging, pack it up and send it to us to replicate.If you live near enough, you can bring the rigging yourself and discuss it with our Rigging team, it will be well worth the trip :-). rope than a cruiser. Once swaged, the terminal cannot be re-used or positionally adjusted. We've reduced the choices to a minimum to make ordering as simple as possible. be exactly level with the same number of turns on the upper and lower par. That is, if the D1s are too tight and the V1s too, we can even force in an inverse curvature. A customer came into our shop the other day to discuss his 33-year old rigging. The picture below reveals the variation in thickness and head angle to the swage. Their role is to prevent the mast from bending to leeward between the first and second spreader levels, especially upwind. We had created a perfectly straight mast track, an adequate rake and a pre-bend. The mysteries of sizing Dyneema standing rigging. 119 316 grade stainless steel Wire Rope (1 group of 19 wires, very stiff with low stretch) is standard on most sailboats. Thanks, very interesting and helpful. You're right (I need to think about). Each mast section is fitted with wire or rod sized to accept the loads generated at that section of the spar. We use the highest quality standing rigging components available, and we won . When buying new running rigging (i.e. 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. Certainly distributing the tension between runner and checkstay greatly reduces the load of the standing rigging. They have been very helpful in responding to email enquiries. But have you ever seen a boat so rigged? All rights reserved. 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. I replaced 3/16 rigging with 5/16 dynex dux and it's still ok after 10 years. 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. While I would love to buy Marlow as a British company, they are a lot more expensive. Working the 10M rigging figures backwards can give the safety factor Pearson applied to the 10M. If it does not rotate, spray some WD40 but never twist the rod rigging. For example, many chainplates are too thin to grip clevis pins correctly. The experience was refreshing to learn with a degree of mathematical certainty what would be a safe decision rather than relying on the often contradictory opinions that we regularly face. 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. Lift-All makes no guarantees that the information provided in the calculator is correct. I would suggest using larger than 1/4" dyneema. If you have a lashing in the design you can have shorter shrouds and a longer lashing so that you have plenty of space to keep tension as creep lengthens the shroud. The second is a calculation based on the current rigging size. Having worked and checked with runners and checks the sea trial was more for the pleasure of ending the day with some sailing. Of course what we have not been able to compare fully is the performance of Marlow vs Liros in heat treatment, pre-stretch and coatings. lol. First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. Add that amount for each splice (it won't amount to even 36 feet in either case), plus the distance around the thimble. I see DSM is coming out with DM20 which is a heat treated pre stretched fiber. This especially with loose D2s that do not prevent the section above from bending forward. 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/. The Bluewave turnbuckle (bottom) is for racing enthusiasts who want to easily adjust settings on the water. Those methods give a guide to sizing the wire for the 10M. Before Ordering Your Colligo Dux Rigging, lots of information and a range of Dyneema for standing rigging from different suppliers, Simplifying fitting a Jordan Series Drogue Sustainable Sailing, Dyneema / Synthetic Rigging Summary Sustainable Sailing, Dyneema Shroud and Chainplate progress Sustainable Sailing, Follow Sustainable Sailing on WordPress.com, DM20 (least creep, but also not as strong, most expensive), SK78 (the first Dyneema with reduced creep). If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. From them we get either 7 or 9mm for the Mizzen and 11mm for the main. If you need to replace a halyard, please dont pull it out of the mast. So, in order to avoid any dangers, we set the inner forestay (to double up with the forestay). Shaking the furled headsail gives an idea of the tension of the forestay. If I were to replace with stainless I'd be looking at a total of 310 feet of 1/4" SS for the main and 120 of 3/16"SS for the mizzen The terminations for wire vs. rod can be quite different and require a lot of customization. And if in doubt, too long is always better than too short! The influence of forestay-V1 and D1 on the bend of the mast up to the first spreader. From the Rigger: Lets play Name that Stay Forestay (1 or HS) Read more, Question: What can I do to ensure that my Spinlock Deckvest is well-maintained and ready for the upcoming season? The checkstay, instead, was tied to the first pulley with a lashing so that it could be adjusted in length. This is mostly a problem if you only use turnbuckles due to their limited range. It was time to move on runners and checkstays to decide if something needed changing. 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. 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. Those details about the differences of heat stretching at Fibre vs braided level are hard to come by. But I have seen many badly adjusted masts and not by just a little. Adjusting the rigging of a sailboat is less complicated than you imagine. Its a popular model of Class40, a first generation Akilaria RC1, designed by Mark Lombard, from around 2006. Before adjusting them, however, we could use them to do a test on the adjustment so far of our mast. Of course, a number of factors affect a rigs lifespan including load, sailing conditions, mileage sailed, age, fatigue from cyclic loading, environmental influences such as salinity and contamination, and frequency of care and maintenance. The Gerr method seems to go a bit smaller but all of them are smaller than the OEM rigging on the 10M. My guess is 3/8". This post has taken an age to research and write. If they are both too tight the mast becomes straight like a telegraph pole losing its beautiful shape. Why not schedule annual service as you would with a car? That said, they play a very important role they help provide additional support for the mast. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. So the 3 different calculations give us (for the Liros D-Pro-XTR), Colligo (SK75): 7mmMarlow from Jimmy Green (DM20): 12mmRigging Doctor for SK99: 8mm, Colligo (SK75): 11mmMarlow from Jimmy Green (DM20): 15mm (but 13mm is pretty close)Rigging Doctor for SK99: 10mm. Website created by Primeconsulting. Can Galvanised Steel be used with Stainless Steel? One other very important comment on sizing for creep: Material creep is a function of length, long sections will have more creep than short sections. 50 or so lbs up in the air, which translated to 200 less rail meat lbs! For 6.5mm stainless steel the breaking strength is 3220kg. 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. 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. 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). Stainless does not like to be deprived of oxygen, so keep tape off your rigging to avoid anaerobic corrosion. When I arrived on this boat to check the mast, there were two problems noticeable with the naked eye. Using a fiberglass or steel tape measure, measure the distance from pin-center to pin-center or bearing point to bearing point as applicable. The swept back spreaders ensure that the mast can stand up even without the backstay, which is no longer structural. However we had to make some assumption and one was that each pair of shrouds would be the same length. As posted above it seems like synthetic standing rigging is still the wild west. Control Lines: Outhaul - Boom length x 2. The very fact that the mast remained straight even when runner and checkstay were tightened gave me good confidence that I had already adjusted the D2s correctly. UNF is the normal thread for standing rigging turnbuckles.Metric threads are possible on European manufactured masts - replacements are available.Switching to UNF is a good idea if you are replacing a complete stay because replacement components will be easier to procure.Imperial size wire is also quite rare in Europe, but is readily available in North America.Imperial components can be sourced but will generally attract a bespoke quote and much longer lead times. We highly recommend you hire a professional rigger if you are not familiar with this process. So we are looking at approx 9300kg breaking strain Dyneema. And PLEASE do not buy a used boat without a professional rig inspection! The checkstay, on the other hand, usually points where the foresail forestay attachment is located. This is our highest recommendation to make sure your rig fits properly. He said it looked fine. 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. Using Colligo's stretch calculator it looks like I should go with 5/16 and 1/4" Dyneema respectively. 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. Therefore, except in exceptional cases, starting from this assumption is more than reasonable. Diameter and performance are determined by your boat length, the function of the rope, and the style of sailing that you do. 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. Spinnaker Sheet / Guy - Boat length x 2. 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 reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. You understand that the calculator provided is for general sling length and size suggestions. This meant that the V1s tension encountered no resistance to mast compression. Since it was not me who had mounted the mast, I could not be sure that the turnbuckles had been inserted correctly, i.e. The overall shroud load is divided up between your shrouds. 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.). As a quick side note people often ask if they should switch from rod to wire rigging or vice versa during the re-rig (usually from rod to wire as rod is much more expensive per foot). Lay out the wire and attach one end of your wire segment to a secure fixed point. Stretchy is slightly problematic because there are multiple forms and the terminology used isnt consistent. By measuring the total length of the turnbuckles and exposed thread, many things could be deduced. This should be a warning. This fudge factor is intended to offset the fact that, regardless of the material used, it will degrade over time with aging and a lack of maintenance. At first, you will only see fields for two loads (Load 1 and Load 2), but once you enter a value for \small x_2 x2, the fields for Load 3 will show up . This explained why the mast started veering to the left. 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. When planning Dyneema rigging the area we have found most confusing is deciding on the size of Dyneema we should fit. for a mid 20 ft boat, the same change in riggin saved as little as 50 lbs. What does all this mean? The Hamma Spoon and Petersen Shroud terminals are designed as direct replacements for the discontinued Navtec T-terminal. 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. All in all it will probably only change your solent to staysail switch point by a knot of wind or two. 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. With a bent mast the first thing really is to understand was why it is so. Once the wind increases and we take the first reef, the runner is no longer needed (especially upwind). 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. 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. The goal is to give the mast a beautiful shape that does not have strange kinks in its curvature and especially any inversions etc. This is why Marlow recommends DM20 for standing rigging, even though the elastic stretch in DM20 is so much more. 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. a toggle fork at the bottom end. Question: My halyard is binding. A high-performance racer might require a lighter, stronger, lower stretch (i.e. This is considerably less expensive than a full re-rig and, again, may identify issues before they become catastrophic. Like your car, your sailboat needs TLC. 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. The standing rigging is all rod on this boat. Stainless Steel Wire Rigging and Wire Rope, Guard Wires, Guardrails and Guardrail Webbing, Replacing your Standing Rigging - a step by step guide, Sta-Lok Rigging Terminal Fitting Instructions, Why choose Compacted Strand for your Standing Rigging, Stainless Steel Wire - Quality Control and Care, Stainless Steel Wire Break Load Comparison, LIROS 3 Strand Lashing, Lacing and Lanyards, LIROS Braided Lashing, Lacing and Lanyards, Running Rigging Rope Fibres and Construction Explained, Dyneema Rope - Cruising and Racing Comparison, Running Rigging - LIROS Recommended Line Diameters, Running Rigging Break Load Comparison Chart, Selecting the right type of block, plain, roller or ball bearing, Custom Build Instructions for Sheets, Halyards, Control Lines, Comparison and Review of Dyneema Soft Attach Low Friction Ring Products, Bending and Hoisting Methods for Sailing Flags, Courtesy Flags Identification, Labelling and Stowage, Glossary of Flag Terms and Parts of a Flag, Petersen Stainless - Upset Forging Information, Thimble Dimensions and Compatible Shackles, Guard Wires - Inspection and Replacement Guidance, Webbing Jackstays - Custom Build Instructions, Danbuoy Instructions - 3 piece Telescopic - Offshore, Man Overboard Equipment - World Sailing Compliance, Safety Marine Equipment List for UK Pleasure Vessels, Helly Hansen Mens Jacket and Pant Size Guide, Helly Hansen Womens Sailing Jacket and Pant Size Guide, Clearance 1kg Automatic ABC Dry Powder Fire Extinguisher, August Race eco-Shotz - Boat Cleaning Kit, Clearance A5 Polyform Heavy Duty Buoy Fender, Strap Toggle - also known as a Toggle Fork, development of the fixed fork - features a transverse bar withan articulating fork attached- for attachment to a mast plate with a hole drilled through it, also known as a mast tang, Shackle Toggle - development of the simple eye featuring a permanently attached D shackle- for attachment to a mast tang. On this Class40 the runner was attached to the first pulley and therefore its length was a given and could not be adjusted. For 8mm stainless steel the breaking strength is 4640kg. ). For example, low stretch is very important in a halyard but not necessarily in a sheet. As mentioned, runners can be used in different ways. 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. See more. We are not experts but just trying to show our thinking processes. I'm not sure that the distribution of the force on the sail, in force at the top and on the boom, is correct. Despite the absence of a backstay its not runners or checkstays that keep the mast up. Illustrations from left to right below:Bluewave Hook Terminal, Hasselfors Flathead, Hamma spoon, Petersen shroud terminal, OS/BSI T-terminal, Sta-Lok T-terminal and Navtec T-terminal (now discontinued). Question When should I replace my standing rigging? The rake depends on the relationship between the length of the forestay and the shrouds as a whole. Whats up? Hi Dave, Thanks for your very thorough synopsis of using Dyneema for standing rigging. These additions add up quickly and affect the cost of parts, labor, special order shipping, taxes, etc. Know the sizes and lengths you need? So the sites we have used are below and for each I have sized replacements for our Mizzen mast (currently 6mm or 6.5mm Stainless Steel cant be sure until we can visit) and our Main mast (currently 8mm we think).
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