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It was clear, however, that we had moved the mast head forward several centimetres and the excess rake was gone. How to calculate the necessary support under a crane Perform routine cleaning/polishing to remove corrosives, identify chafe points and other damage, and properly tune your standing rigging (shrouds, forestay, backstay). The other positive about Dynice DUX is that it is only slightly more expensive than Vectran or Dyneema, vs. PBO which is incredibly expensive. From the Rigger According to industry standards, the anticipated lifespan for stainless steel rigging is 10-12 years for wire and 15-20 years for rod. On this boat only the V1s on deck are adjustable, the rest of the shroud is of fixed length. Like your car, your sailboat needs TLC. So we had left-right and fore-aft problems. We forego some fine tuning for safety offshore. Differences emerged immediately, the D1 on the left was about 1cm shorter than the one on the right. We have also said that the mast of a Class40 is not quite so bendable and adjustable. 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. Make sure your turnbuckle is centered between the studs for accurate measurement. The checkstay, instead, was tied to the first pulley with a lashing so that it could be adjusted in length. Again, increasing the line diameter reduces the problem as does being able to get enough tension to stretch out the elasticity so that the rig doesnt flop around. All rights reserved. Add shackles and splices from our Running Rigging Builder They sell 100m drums and 50m hanks which is handy (they can also make custom lengths with a variety of splices etc). This explained why the mast started veering to the left. For a rod of the size we were adjusting we needed a large and very expensive tension measurement tool. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. We removed two more turns from the V1s and took them back at the forestay. I think that's the real problem to solve. 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). 3000 # is not enough to get rid of constructional stretch, and you would need to sustain your load over time. Having worked and checked with runners and checks the sea trial was more for the pleasure of ending the day with some sailing. Using our beam load calculator. Asymmetric Spinnaker Sheet - Boat length x 2.5 to 3. For example, when setting the runners, it was noticeable that the working points of the control lines had moved by about 20cm. Unstep the mast and remove the rigging from the boat. 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. Rigging Calculator on the App Store We do support educated do-it-yourself sailors if you are confident and understand the rigging process. 100m of the 8mm should be plenty for the Mizzen with enough spare to replace several shrouds.Possibly from our back of the envelope calculations 150m of the 12mm for the Main should also give enough for several replacements. On a Mini 650, to avoid too many lines, and with a boom that weighs a few kilos, nothing replaces the topping lift. How to Measure Standing Rigging 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. Question: My halyard is binding. Boat Design Net does not necessarily endorse nor share the view of each individual post. 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). zurich insurance sydney webpack exclude node_modules moorage on lake washington hockeygymnasium stockholm halfords power steering fluid is bowers a gypsy name. These are boats where you usually an average setting and not touch it before a specific event. You may need to apply pressure to stretch the wire straight, you may find it helpful to use a line or block and tackle. That has two ways of calculating the size. 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. The flogging of a loose shroud can actually be harder on wire than steady pressure. 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). In fact, I had sailed on an identical boat for a total of about 60,000 miles. This App is a tool that facilitates the calculation of basic rigging, weights of different profiles, and centers of gravity of composite loads. Standing rigging is the collective term for the system of wires (or rods) that supports the mast, both fore-and-aft and laterally. With this procedure we were able to restore a situation where the two V1s shrouds were the same length and with the same adjustment. Once the sail was lowered and the retaining bolts were unscrewed, it was possible to raise the drum and access the forestay turnbuckle. If they are both too tight the mast becomes straight like a telegraph pole losing its beautiful shape. A rig inspection beforehand can minimize surprises. 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. The Supajust Eye Toggleand Swage (bottom) is a high specification stainless steel open body turnbuckle. 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. By now, I would say, even on cruising boats it is one of the most common rig arrangements. The current shrouds are 5/32" diameter. That is with the forestay and backstay attached to the masthead as fixed standing rigging that create traction in the opposite direction. When buying new running rigging (i.e. When I arrived on this boat to check the mast, there were two problems noticeable with the naked eye. The next two methods are basically the same but use slightly differnt load levels for the shrouds. The above will give a total minimum weight on each leg of the sling of 2,000 pounds divided by 2 legs or . To do this we tighten the runner with the checkstay lashing very short to start with. This turnbuckle features calibration, one extra-long stud and a fold-out arm to facilitate easy adjustments. Or maybe a lot of other boats are under-rigged? In our search we have found three sites particularly helpful. I.e the mast will go backwards to the first level of spreaders then stard bending forward from there to the masthead. 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. 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). be exactly level with the same number of turns on the upper and lower par. Suddenly you run the risk that with enough wind the checkstay could even cause the mast to reverse its curvature with the masthead going forward and the lower part held back by the tight checkstay. 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). This should be a warning. That is because a Dyneema line the same strength as the Stainless Steel it replaces would be too stretchy to work. The numbers in the Toss and Henderson calculations were for a 2.5 safety factor. Discontinuous rigging is made up of shorter sections of wire that connect to each other at the spreader tips. special care should be taken to ensure that there will be sufficient material left on the tang/eye/plate if youintend toenlarge any holes. The influence of forestay-V1 and D1 on the bend of the mast up to the first spreader. 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. Taking the total capacity of the upper and lower shrouds compared to the shroud load calculated using the RM30 formula gives a safety factor of 4.2. Know-how: Modern Rigs 101 - Sail Magazine The choices get more tricky as Liros dont make every size (no 7, 9 or 11mm). I need to do some more study and number crunching. The standard seems to be 2.5 to 3.0. 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. It is your responsibility to assure that the slings you use are appropriate for your application. Therefore, except in exceptional cases, starting from this assumption is more than reasonable. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. After attempting to sort through the many personal opinions on appropriate wire size for Atticus, Jordan decided to study up on the scantling equations for mathematically determining for ourselves the safest yet most economical size for our rig. Set sail with the benefit of Team Jimmy Green expertise. Take your measurements from pin center to pin center as seen in the diagram. If your end terminal is a threaded stud measure to the end of the stud; include the length of the threaded portion, note whether it is left or right handed, and the thread size. You understand that the calculator provided is for general sling length and size suggestions. Replacing your turnbucklesCheck the thread size (standard or upsize)Select a turnbuckle which provides articulation e.g. If you have any questions, please dont hesitate to call or email us and we would be happy to help you. Things to look for include corrosion, pitting, cracks, and broken strands or meat hooks on the wire. 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 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. Unfortunately lots of the information isnt clear about which they are referring to in their guidance. 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. The boat was in the water, we first had to avoid the risk of unscrewing a turnbuckle and accidentally unhooking a shroud. The picture below reveals the variation in thickness and head angle to the swage. One of the most frequently asked questions we hear is: How do I measure my sailboat standing rigging? Also Marlow describes them all and includes comparison charts. The most popular choice is the Stalok version (top) which utilises a chrome-plated, forged bronze body. This meant that the V1s tension encountered no resistance to mast compression. When measuring rigging, the convention is to measure from pin center to pin center or from bearing point to bearing point. 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. If you are replacing your turnbuckles, make sure the existing turnbuckles are adjusted to their normal set position for sailing before taking your measurements. Each complete turn corresponded to approximately 3-4 millimetres in length. Unfortunately, there are not always visual clues that your rigging has passed its life expectancy. But I have seen many badly adjusted masts and not by just a little. Load Calculator - Stren-flex A customer came into our shop the other day to discuss his 33-year old rigging. This type of rig, nine tenths fractional, has two orders of spreaders. We therefore started by loosening the V1s by two full turns, observing a reduction the bend. Running Rigging Calculator - SailboatOwners.com I jibed without runners in 50 knots of wind and nothing happened. 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. 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). To preserve the left-right adjustment symmetry, we unscrewed the V1s turnbuckles two full turns each side. 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. Boom Vang - Boom length x 2. Imagine bearing away, removing the genoa and hoisting a large spi. I replaced 3/16 rigging with 5/16 dynex dux and it's still ok after 10 years. 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. Our preferred rope supplier, Jimmy Green Marine, has lots of information and a range of Dyneema for standing rigging from different suppliers. Consider pulling your rig every 5-6 years to inspect the mast base, chainplates, turnbuckles, wire, etc. This will certainly lead to creep issues and probably re-splicing if you use turnbuckles. 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). 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 example, low stretch is very important in a halyard but not necessarily in a sheet. 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 line is also lighter and it doesn't absorb water, as compared to Vectran. Question When should I replace my standing rigging? The wind was not much but enough to load the mainsail close-hauled and verify that the mast remained straight. 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.). Our riggers can also tune your rig, either at the dock or under sail. This post has taken an age to research and write. rope than a cruiser. So 716 * 30 gives an RM30 of about 21,500 lbs. 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. That is, if the D1s are too tight and the V1s too, we can even force in an inverse curvature. For decades now, however, fractional rigs with swept back spreaders have been increasingly widespread. At this point many of our customers choose to ship their rigging to our shop in Miami Florida where we will duplicate it exactly. chunkier appearance than forged parts because the internal grain of the material remains parallel, requiring some faces to be longer to retain strength. First we wanted to take care of putting the mast straight and solve the problem of its excessive rake. 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. 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/. Lets consider the mast of a Class40, with two orders of swept back spreaders and its standing rigging. So these are the sites Ive found most useful in working sizes for our boat. But, the overall curve of the three sections of the mast was not yet regular. Usually they are made with dyneema and not just simple polyester. 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). 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. Rigging Math | SailNet Community First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. lol. Type in the parameters 2. Then we choose what percentage of the breaking strength of the Dyneema we want this to be. We use the highest quality standing rigging components available, and we won . The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. 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). The second is a calculation based on the current rigging size. On a boat like yours with single uppers and double lowers, the uppers see about 45% of the load and . Braided line density is the key to eliminating constructional elongation over time.