We also set runners and checkstays just for safety. Their page (from 2015) Before Ordering Your Colligo Dux Rigging links to a PDF table for sizing. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. I am not aware of any such cases among Class40s. So these are the sites Ive found most useful in working sizes for our boat. 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. Why not schedule annual service as you would with a car? As posted above it seems like synthetic standing rigging is still the wild west. Spinnaker Sheet / Guy - Boat length x 2. Hey all, I'm going to do my standing rigging myself with Dyneema using thimbles and dead eyes. I don't have a direct figure for RM30 but I do have IMS measurement data for the 10M and can extrapolate a pretty good approximation. A boat with bad rigging is at best a pain in the #@$ and at worst a lethal weapon. 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. Despite the absence of a backstay its not runners or checkstays that keep the mast up. zurich insurance sydney webpack exclude node_modules moorage on lake washington hockeygymnasium stockholm halfords power steering fluid is bowers a gypsy name. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. The backstay is both an element of the standing rigging but can also be tuned. Asymmetric Spinnaker Sheet - Boat length x 2.5 to 3. What does all this mean? For example, port upper shroud (fig 3) or forestay (fig 1). a toggle fork at the bottom end. I would suggest using larger than 1/4" dyneema. Designers typically specify standing rigging and attachments, including bolts, that are 1.3 to 1.4 times stronger than the calculated load. Unfortunately, there are not always visual clues that your rigging has passed its life expectancy. For decades now, however, fractional rigs with swept back spreaders have been increasingly widespread. However, in long race, especially single-handed, offshore, it has some human contraindications. He asked Isnt the industry standard just a ploy by manufacturers to sell more wire. Generating 3D hull using only picture of boat. Condition of sling - passes all inspection criteria. 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. Required fields are marked *. The Event, its name, logo, website, social media pages and all their content are the sole property of Marco Nannini LTD. All rights, title, intellectual property, Copyright, contractual and other entitlements of and relating to the Event, its name, logo, website, social media pages and all their content, vest in and are retained by Marco Nannini LTD. We have chosen a Class40, a sister-ship of the boat with which I competed in the Global Ocean Race 2011/2012. The original spec. That is because a Dyneema line the same strength as the Stainless Steel it replaces would be too stretchy to work. a toggle fork at the bottom end. Then we choose what percentage of the breaking strength of the Dyneema we want this to be. Ive taken the stainless breaking limits from the Marlow table off Jimmy Green (see above). We had no doubts having already simulated the effort with checkstays. I relied on my historical memory and everything seemed to me in order. 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. Question: Do you have guidelines for selecting halyards, sheets, etc. Creep will mean your rig needs re-tensioning over time. Those details about the differences of heat stretching at Fibre vs braided level are hard to come by. Standing rigging definition, rigging remaining permanently in position as a means of steadying various spars, shrouds, stays, etc. The line is also lighter and it doesn't absorb water, as compared to Vectran. If they are both too tight the mast becomes straight like a telegraph pole losing its beautiful shape. With a bent mast the first thing really is to understand was why it is so. I wish the rope companies made the creep properties easier to find. The forestay turnbuckle in this case, and like on many other boats, was inside the furling drum. This is considerably less expensive than a full re-rig and, again, may identify issues before they become catastrophic. From Marlow Ropes we have this: Others refer to Elastic Stretch, Constructional Stretch and Creep. Taking V1s and D1s and shaking them, hitting them, you get a feel for their. says the wire was 1/4". You agree that your ultimate purchase and use of Lift-All slings must be determined by you to be appropriate for your specific applications. 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. Speaking of standing rigging we have to open a parenthesis on the types of rigs possible for a sailboat. When we fabricate a piece of rigging including a turnbuckle, we will make it to your specifications with the turnbuckle open 2/3rds to allow tuning of the rig. 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). I hear about these guys on every forum everywhere. The port V1 was 2cm shorter than the starboard V1. All standing rigging is manufactured right here in our rigging shop -- the way it's been since 1984. So 716 * 30 gives an RM30 of about 21,500 lbs. 3/16" for lower shrouds is also what I had. (contrasted with running rigging). This meant that the V1s tension encountered no resistance to mast compression. All the vertical tension turned into compression and bend. 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 distance between the halyard and the mast at the boom is your rake. It becomes simply the means to adjust the mast bend and curvature and would be considered and its control line is therefore part of our running rigging. He is the engineering, construction and project management specialist company's chief rigging engineer. Tightening the left runner-checkstay pair seemed more or less ok. Starboard we clearly had a problem, the mast would bend to windward at the height of the second set of spreaders. 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. The most popular choice is the Stalok version (top) which utilises a chrome-plated, forged bronze body. Calculate the length of bury. The spring-loaded ones suitable for adjusting the shrouds of a Mini 650 are useless. Still the biggest name that we have found producing fittings for Dyneema rigging. This is because upwind mast is fully loaded at just 15-16 knots after which you need to reduce sail. One area still to be worked out is how much length to allow for creep. All in all it will probably only change your solent to staysail switch point by a knot of wind or two. But I have seen many badly adjusted masts and not by just a little. If you cut heat stretched SK90 or 99, you will get 12 strands that fall apart. This table shows the normal UNF thread sizes for each wire diameter: This table shows the normal Metric sizes for each wire diameter: Note that there is no natural metric equivalent to 7/16" i.e. I.e the mast will go backwards to the first level of spreaders then stard bending forward from there to the masthead. What makes this even more complicated is that a) there are lots of variations of Dyneema available, also b) each rope manufacturer has their own ways of treating Dyneema (eg pre-stretch, heat treatments, and coatings) which makes comparisons even more difficult. The influence of forestay-V1 and D1 on the bend of the mast up to the first spreader. Whats up? for a mid 20 ft boat, the same change in riggin saved as little as 50 lbs. When planning Dyneema rigging the area we have found most confusing is deciding on the size of Dyneema we should fit. 1x19 Wire Rigging Stainless Steel 1x19 Wire Rope Rigging is the most popular solution for standing rigging on cruising yachts. I hear about these guys on every forum everywhere. This is to avoid the unpleasant situation of having a hard time getting to re-attach one. 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 spreaders are not perpendicular to the fore-aft axis but swept towards the stern on the horizontal plane. 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. I have a 1988 Catalina 22'. We therefore started by loosening the V1s by two full turns, observing a reduction the bend. For example, many chainplates are too thin to grip clevis pins correctly. This is why Marlow recommends DM20 for standing rigging, even though the elastic stretch in DM20 is so much more. The rake depends on the relationship between the length of the forestay and the shrouds as a whole. That's a little high because it's using the combined capacity of the lowers and reality will have them loaded differently. Control Lines: Outhaul - Boom length x 2. We have had many customers who have found a great deal on a used boat only to discover that they need to spend a small fortune on new rigging. It is your responsibility to assure that the slings you use are appropriate for your application. Threaded Bronze Inserts ensure superb adjustment without seizing or galling and the swivel toggle action allows full articulation in two planes. Shaking the furled headsail gives an idea of the tension of the forestay. For example, low stretch is very important in a halyard but not necessarily in a sheet. Take your measurements from pin center to pin center as seen in the diagram. 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. The Bluewave turnbuckle (bottom) is for racing enthusiasts who want to easily adjust settings on the water. 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. We were thinking LIROS D-Pro-XTR (SK99) as by far the cheapest option (and as SK99 is stronger than SK78 we should have less creep than the cheapest Marlow option which is SK78). Keith Anderson is a 40-year veteran of the crane and rigging industry. Please read the instructions completely before you start measuring your rig. By now, I would say, even on cruising boats it is one of the most common rig arrangements. Just select your boat below and you're a couple clicks away from new, top quality rigging. The above will give a total minimum weight on each leg of the sling of 2,000 pounds divided by 2 legs or . 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 terminations for wire vs. rod can be quite different and require a lot of customization. Elastic Stretch is much the same to work with as creep except that it will show up quite quickly, so a few re-tensions in the first few months should sort it. The Hamma Spoon and Petersen Shroud terminals are designed as direct replacements for the discontinued Navtec T-terminal. 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. Runners and checkstays are not structural, therefore are not to be considered part of the standing rigging per se, the mast does not need them to stay up. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. standing rigging. We also attached spinnaker halyards one to the left and one to starboard to an eyebolt. SCT also includes various modules to perform calculations ISO 12215-6, 8 and 9. Cunningham - Boom length x 1. This is the figure I used in the formulas below. 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. Once swaged, the terminal cannot be re-used or positionally adjusted. be exactly level with the same number of turns on the upper and lower par. directly with the yard of your choice. If we observe the mast we will also notice that this setting will mean that when tightening runners and checkstay there isnt much change in mast shape. We will talk here specifically about boats with swept back spreaders. A rig inspection beforehand can minimize surprises. I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. 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. Learn how your comment data is processed. Factors you must consider include: Type of hitch/method of rigging. They replace the topping lift and support the boom. Add splices, shackles, and whipping with a single click. This explained why the mast started veering to the left. Hole diameter-to ensure the new pins will fit correctly. It also has a module for calculating continuous beams and large facilities for manage the various materials used in the construction of modern boats. We gave the forestay one more turn and removed a turn from the V1s and we were satisfied. The swept back spreaders ensure that the mast can stand up even without the backstay, which is no longer structural. Adjusting the rigging of a sailboat is less complicated than you imagine. 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). 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. 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). RIGGINGS AND MASTS CALCULATIONS ONLINE RIGGINGS AND MASTS FREE DATABASE: Just in 10 minutes! They are not included in our estimate. 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. As we go through the sizing calculations comparisons are difficult as they dont use the same version of Dyneema. We forego some fine tuning for safety offshore. If they are not willing to take the financial risk, are you willing to risk yourself and your crew? Differences emerged immediately, the D1 on the left was about 1cm shorter than the one on the right. 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. The flogging of a loose shroud can actually be harder on wire than steady pressure. They are all full re-rigs from 119 wire with new rigging screws (please note all examples given are for supply only): There is nothing more expensive than a cheap boat! This characteristic of heat stretched SK75 is indeed the reason that Hampidjan is still using this old chemistry of Dyneema and not moved on to the new stuff. Please note this article is a translation and may contain some errors for which I hope youll forgive us! They are adjustable both to raise the boom in port and to put them at rest during navigation. From the Rigger: We are so glad you asked! Heat stretched SK75 really performs better under a constant load. Doubt if your chain plates would take 1/2". 1. Looking at the Jimmy Green table for all the Dyneema they sell we find that 7mm is good (except Liros dont sell 7mm so it has to be 8mm for the Liros D Pro Xtr [SK99] or 10mm for the Liros D Pro Static [DFM20] ). Before tightening the forestay, however, I wanted to loosen the the V1s a little so as not to induce further compression in the mast. Our running rigging calculator can instantly spec lines for more than 5,000 sailboats. 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. These additions add up quickly and affect the cost of parts, labor, special order shipping, taxes, etc. We highly recommend you hire a professional rigger if you are not familiar with this process. Historically, the most traditional rig type is the masthead one. 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). 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. They make the information from manufacturers such Marlow rather more accessible. Since it was not me who had mounted the mast, I could not be sure that the turnbuckles had been inserted correctly, i.e. . 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. Both are based on the this formula: RM30 is the righting moment at 30 degrees heel As you size up creep and stretch will always be reduced. Or maybe a lot of other boats are under-rigged? The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. There seems to be a lack of information on the web about the sizing for standing rigging. We have also said that the mast of a Class40 is not quite so bendable and adjustable. 119 316 grade stainless steel Wire Rope (1 group of 19 wires, very stiff with low stretch) is standard on most sailboats. 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. Want to prolong the lifespan of your rigging? 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. I will analyze your calculations carefully. In this article we will deal with the tuning of standing rigging of a typical sailboat. Im least concerned about Constructional Stretch or bedding in. Things to look for include corrosion, pitting, cracks, and broken strands or meat hooks on the wire. 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). Jimmy Green Marine commonly supply 3 types of rigging screw for standing rigging.These are sometimes referred to as bottle screws or turnbuckles. You understand that the calculator provided is for general sling length and size suggestions. It is indeed a complicated process in using a braided line for standing rigging. This curvature lets you bring the fat of the mainsail forward flattening the sail. Imagine bearing away, removing the genoa and hoisting a large spi. There is no backstay at all, which is common on many modern boats. By measuring the total length of the turnbuckles and exposed thread, many things could be deduced. Thus your list is not suitable and not providing the correct strength for design allowable limits of mast alloy grades. Does anyone know if 5/32" is the factory size? The problem is solved with the introduction of structural lazy jacks. This is a very inexpensive investment (by yachting standards ) to ensure that your rig is in sound condition. If these are too soft the mast will sag to leeward between the first spreader and masthead. If your rigging terminal contains a pin remove the pin and use this as your attachment point. Continuous rigging is more common on older and more traditionally rigged boats, while newer boats and performance-oriented sailboats often have discontinuous rigging. 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 wire is inserted into the hollow terminal and pulled through a set of roller dies. The rig of this boat is not particularly extreme or delicate, being the Class40s designed for great ocean navigation. 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). The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. In addition to this it was clear that when the starboard runners and checkstay were tensioned, the mast deteriorated in shape. https://www.ebay.ca/itm/5-13mm-HampiKl3MW1P7_hTkTw. The boom will rise again when we tension the reef line and this rarely even needs the boom to be helped by hand. Having to remember this T-bone day and night in every situation is not the best of proposition. The slightly more expensive Petersen Stainless version (top) is machined from aluminium bronze bar with the open centres offset drilled from both sides making it 20% lighter than forged equivalents and equally strong. Lower Fore St, Beer, East Devon, EX12 3EG. One seemingly easy option is to over-size. If in doubt, get a professional opinion. Unlike the Gerr formula the RM30 formula accounts for shroud base width. This will certainly lead to creep issues and probably re-splicing if you use turnbuckles. A change of about 1.5cm that was well noticeable at a height of 20 meters. Type in the parameters 2. Whats up? You cant cut corners and get the same results as the pros. I'm a little confused. The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. Check that everything is straight and true. But without mast height I suppose this is only partly covering the shroud angle issue? The benefits are less windage and less weight aloft. This on a mast with two sets of spreaders. Maybe I was being a bit hyperbolic when i said that dude was 3x the amount of competitors. On boats with swept back spreaders, runners and checkstays are not structural. The line denotes the measurement point used bythe Jimmy Green Rigging Team. Your email address will not be published. Herb suggests under 15% or even better under 10%. The choices get more tricky as Liros dont make every size (no 7, 9 or 11mm). If you can get the cap, Colligo, Colligo, Colligo. Standing Rigging CalculationBack to Rigging By appearances the 10M is a very heavily rigged 33 footer. If you have any questions, please dont hesitate to call or email us and we would be happy to help you. 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. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. 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. Others, such as Mr. E.Sponberg, make other distribution of forces. Driscoll Boat Works and Shelter Island Boat Yard are both within walking distance of Rigworks. So you cant simplify this by saying to keep the working load below a certain percentage of break strength. After that I went back to looking at the mast track and, no wonder, the mast was perfectly straight on the left-right axis without any curvatures. If your running rigging leads back to the cockpit . For 8mm stainless steel the breaking strength is 4640kg. Is it maybe, just maybe possible that they have cornered the market on synthetic standing rigging through a, Location: Bas Caraquet, New Brunswick, Canada. With the mast and rigging still standing and set to its normal sailing positions, tape or mark all the threads of the studs where they exit the turnbuckles. The Dyneema sizes can be the same as for the 6mm Stainless above except that the Marlow M-Rig Max (DM20) might be better in 8mm.
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