How do I calculate righting moment? - Sailing Magazine 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). Both are based on the this formula: RM30 is the righting moment at 30 degrees heel The line is also lighter and it doesn't absorb water, as compared to Vectran. See other options in diagram to the right. This also serves as your pin center measuring point. On a Mini 650, to avoid too many lines, and with a boom that weighs a few kilos, nothing replaces the topping lift. 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. For more information on rig inspections, visit our prior Ask the Rigger article at http://rigworks.com/the-scoop-on-rig-inspections/. The standing rigging is all rod on this boat. 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. The port V1 was 2cm shorter than the starboard V1. Stretch the wire straight and ensure there are no bends in the wire. This will be true for all three of your reef points. You cant cut corners and get the same results as the pros. Taking 70% of the lower shroud capacity gives a safety factor of 3.4. The strength, minimal elongation, excellent corrosion resistance and general performance of KOS 1x19 construction stainless steel wire are suitable for most sailing yachts. Our calculator is easy and simple to use. Website created by. This is considerably less expensive than a full re-rig and, again, may identify issues before they become catastrophic. We gave the forestay one more turn and removed a turn from the V1s and we were satisfied. You may need to apply pressure to stretch the wire straight, you may find it helpful to use a line or block and tackle. Factors you must consider include: Type of hitch/method of rigging. These are boats where you usually an average setting and not touch it before a specific event. My understanding is if you allow for this and pre-stretch your stays you can reduce the need for re-splicing. Decide which you want (no doubt Colligo has a guide for bury amounts of their DUX). Yes, doing it yourself will theoretically save money. Chainplates 101: Inspect and Refit | Cruising World This can be estimated with the boat's beam, ballast, draft, and displacement. Hence, we have non-structural runners and checks, no backstay and no topping life. SCT also includes various modules to perform calculations ISO 12215-6, 8 and 9. 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. Catalina 22 Shroud Sizing | SailNet Community 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. The Hamma Spoon and Petersen Shroud terminals are designed as direct replacements for the discontinued Navtec T-terminal. Standing rigging Definition & Meaning | Dictionary.com Could someone please speak of the advantages / disadvantages of increasing the. Maintain your standing rigging! 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. Select your wire construction KOS 1x19 - this is the standard wire for standing rigging on Cruising Yachts Petersen Compact Strand - for higher strength performance KOS flexible 7x19 - for applications where the wire will be required to turn around sheaves. How to Measure Standing Rigging - Sailing Services Using our beam load calculator. Simple. The above will give a total minimum weight on each leg of the sling of 2,000 pounds divided by 2 legs or . Most lines are pre-stretched. I'm not sure that the distribution of the force on the sail, in force at the top and on the boom, is correct. Question: Do you have guidelines for selecting halyards, sheets, etc. 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 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). 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). directly with the yard of your choice. RIGGINGS AND MASTS CALCULATIONS ONLINE RIGGINGS AND MASTS FREE DATABASE: Just in 10 minutes! The standing rigging is all rod on this boat. All standing rigging is manufactured right here in our rigging shop -- the way it's been since 1984. 1/4" is usually 7/16" or 1/2". 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. So in all fairness, I was trusting my eyes. Their role is not simply to contain the main when dowsing it. Mast and Rigging calculations | Boat Design Net We have also said that the mast of a Class40 is not quite so bendable and adjustable. 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. That said, runners and checks play a very important role in stabilising the mast and reducing its stress. Measure your wireIt is important toestablish the diameter of your wire becauseall the different types of wire terminationare manufactured with specific dimensionsfor each diameter. That is with the forestay and backstay attached to the masthead as fixed standing rigging that create traction in the opposite direction. They are all full re-rigs from 119 wire with new rigging screws (please note all examples given are for supply only): With a fractional rig they provide extra support, and become partially structural in reducing the workloads of the last part of the mast not reached by the shrouds. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. The spreaders, in this case, are in line, perpendicular to the fore and aft axis of the boat. If I were only using turnbuckles for tensioning then I might have gone for DM20 to avoid running out of tensioning due to creep. Designers typically specify standing rigging and attachments, including bolts, that are 1.3 to 1.4 times stronger than the calculated load. Plus there will be more spare strength if there is UV or Chafe damage. https://www.ebay.ca/itm/5-13mm-HampiKl3MW1P7_hTkTw. In fact, if the D2s had been too soft, when tightening the checkstay the mast would bend to windward. On boats with swept back spreaders, runners and checkstays are not structural. It is your responsibility to assure that the slings you use are appropriate for your application. However, between the sites we have found at least four ways of deciding what size is needed. We had created a perfectly straight mast track, an adequate rake and a pre-bend. Boom Vang - Boom length x 2. Sailboat Standing Rigging | RiggingAndHardware.com So we are looking at approx 6500kg breaking strain Dyneema. The overall shroud load is divided up between your shrouds. When I arrived on this boat to check the mast, there were two problems noticeable with the naked eye. Perform routine cleaning/polishing to remove corrosives, identify chafe points and other damage, and properly tune your standing rigging (shrouds, forestay, backstay). There is no backstay at all, which is common on many modern boats. Hey all, I'm going to do my standing rigging myself with Dyneema using thimbles and dead eyes. Why not schedule annual service as you would with a car? We removed two more turns from the V1s and took them back at the forestay. (If you prefer more choices, please see our Running Rigging Builder.) A DIY Solution to Tired Standing Rigging - Sail Magazine A boat with bad rigging is at best a pain in the #@$ and at worst a lethal weapon. You understand that the calculator provided is for general sling length and size suggestions. This is to avoid the unpleasant situation of having a hard time getting to re-attach one. Heat stretched SK75 really performs better under a constant load. The mysteries of sizing Dyneema standing rigging Stainless does not like to be deprived of oxygen, so keep tape off your rigging to avoid anaerobic corrosion. Seen from the side, the mast showed excessive rake and pre-bend that needed correcting. On the Class40, even though the boom is made of carbon, we can imagine how much the boom plus mainsail would weigh especially if full of water. The Bluewave turnbuckle (bottom) is for racing enthusiasts who want to easily adjust settings on the water. In fact, I had sailed on an identical boat for a total of about 60,000 miles. The forestay turnbuckle in this case, and like on many other boats, was inside the furling drum. For an average 40-foot boat, Cockerill estimates about $100 per foot to re-rig with wire rigging ($4,000), as well as the round-trip cost to haul and launch the boat and unstep and step the rig (an additional $2,500 or so). As posted above it seems like synthetic standing rigging is still the wild west. We will talk here specifically about boats with swept back spreaders. 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. That has two ways of calculating the size. For 8mm stainless steel the breaking strength is 4640kg. 2.5mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 3mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 4mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 5mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 6mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 7mm 1x19 Stainless Steel Wire Standing Rigging A UK Chartered Engineer and Fellow of the Institution of Mechanical Engineers he has, since 2001, managed the rigging engineering group at Bechtel. . 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. With a masthead rigged boat, the backstay can be used to increase forestay tension in high winds. All you have to do is input the span of the beam, the magnitude of the point loads, and their distances from support A. Ive taken the stainless breaking limits from the Marlow table off Jimmy Green (see above). This turnbuckle features calibration, one extra-long stud and a fold-out arm to facilitate easy adjustments. One of the most frequently asked questions we hear is: How do I measure my sailboat standing rigging? This App is a tool that facilitates the calculation of basic rigging, weights of different profiles, and centers of gravity of composite loads. As we go through the sizing calculations comparisons are difficult as they dont use the same version of Dyneema. Creep will mean your rig needs re-tensioning over time. The list of materials and design stresses are those that ISO 12215-5 standard says that can be used. This post has taken an age to research and write. The bend instead arises from compression of the mast given by the tension of the V1s, these pull down the mast that bends forward. Taking the upper and a single lower of 5/16" gives a safety factor of 3.1. This is the same both on Mini 650s and on Class40s. We took then tightened the forestay by the same two full turns on the turnbuckle. I therefore decided to tighten further the D1s by a turn and the D2s by two. I have to study the correct way to approach this problem. Set sail with the benefit of Team Jimmy Green expertise. I.e the mast will go backwards to the first level of spreaders then stard bending forward from there to the masthead. These guidelines are particularly useful when estimating the cost of a project. Re-rigs - Petersen Custom Rigging Add that amount for each splice (it won't amount to even 36 feet in either case), plus the distance around the thimble. The next two methods are basically the same but use slightly differnt load levels for the shrouds. To do this we tighten the runner with the checkstay lashing very short to start with. We are Patreons of Rigging Doctor, the combination of their YouTube channel and website has more practical resources on real world cruising use of Dyneema than any other Ive found. So I'm interested in your opinions. Jimmy Green Marine commonly supply 3 types of rigging screw for standing rigging.These are sometimes referred to as bottle screws or turnbuckles. First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. 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. For example, when setting the runners, it was noticeable that the working points of the control lines had moved by about 20cm. Running rigging - SailboatOwners.com Check your spreaders, chainplates and turnbuckles for cracking, fatigue, missing cotter pins/rings, etc. With this procedure we were able to restore a situation where the two V1s shrouds were the same length and with the same adjustment. This is because upwind mast is fully loaded at just 15-16 knots after which you need to reduce sail. This is not to say it was already set right, but we had zeroed the lateral tension errors. For a -inch turnbuckle and toggle, a minimum thickness of. But I have seen many badly adjusted masts and not by just a little. 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. If in doubt, get a professional opinion. The picture below reveals the variation in thickness and head angle to the swage. At this point many of our customers choose to ship their rigging to our shop in Miami Florida where we will duplicate it exactly. Shaking the furled headsail gives an idea of the tension of the forestay. If your running rigging leads back to the cockpit, remember to account for that in your length. Since this boat is sailed in the Mediterranean we must have a good light wind setup and be able to intervene on the shape of the sail as the wind increases. Standing rigging: step by step guide on how to tune it on your sailboat To calculate the load on a particular sling leg proceed as follows: Take the total weight of the load and divide this by the number of legs supporting the load. ). They show up on your doorstep ready to use. We had no doubts having already simulated the effort with checkstays. Those details about the differences of heat stretching at Fibre vs braided level are hard to come by. From them we get either 7 or 9mm for the Mizzen and 11mm for the main. With the D2s completeley loose, the D1s were obviously too soft too. The Loos tension gauges take the guesswork out of cable or rod tension adjustment. Question: My halyard is binding. This means that when the main halyard is released, the boom falls onto the coach-roof. 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. 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. NE ropes has STS-HSR. The simplest and quickest way is to use a rig-tension meter, such as the Loos gauge. 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 Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. Put one end of the tape on the pin at the terminal held in the turnbuckle on deck, then stretch out the tape until you reach the terminal holding the eye to the tang up the mast. Looking at the mast from the side you could see a beautiful shape without irregularities that gently curved back. The evolution started with offshore sailing boats such as the Mini 650s and Class40s and now it is very widespread also among cruising sailboats. Know-how: Modern Rigs 101 - Sail Magazine Not only will your rig last longer when properly tuned, your boat will sail better, and who doesnt love that! By measuring the total length of the turnbuckles and exposed thread, many things could be deduced. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. Let us go over your rig from top to bottom and end to end to identify trouble before it gets worse. The eye will serve as your pin center. 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. Its a popular model of Class40, a first generation Akilaria RC1, designed by Mark Lombard, from around 2006. This means that the threads are not screwed in equally. Our preferred rope supplier, Jimmy Green Marine, has lots of information and a range of Dyneema for standing rigging from different suppliers. The first is the RM30 heeling test to calculate rig loads. Can you break it down for me? They sell 100m drums and 50m hanks which is handy (they can also make custom lengths with a variety of splices etc). What is meant when we say they are structural? Forged:Some Petersen Stainless terminals are manufactured using a process known as electrical upset forging.The electrical current used internally aligns the grain structure of the stainless steel.The result is a stronger, lighter fitting that is also more resistant to loading fatigue.The picture shows a machined eye (top) which is slightly larger than the relatively minimal forged eye (bottom) for the same size wire. After this introduction, lets move on to a practical case. Lets consider the mast of a Class40, with two orders of swept back spreaders and its standing rigging. Still the biggest name that we have found producing fittings for Dyneema rigging. Like your car, your sailboat needs TLC. Selecting Rope - Length, Diameter, Type - RIGWORKS INC. I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. For decades now, however, fractional rigs with swept back spreaders have been increasingly widespread. 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. However, in long race, especially single-handed, offshore, it has some human contraindications. Diameter and performance are determined by your boat length, the function of the rope, and the style of sailing that you do. I see DSM is coming out with DM20 which is a heat treated pre stretched fiber. If you are replacing your turnbuckles, make sure the existing turnbuckles are adjusted to their normal set position for sailing before taking your measurements. My guess is 3/8". Discussion in 'Software' started by TANSL, Feb 11, 2016. We are not experts but just trying to show our thinking processes. Lay out the wire and attach one end of your wire segment to a secure fixed point. For example, for ocean-crossing boats, runners and checkstays help stabilise the mast and prevent it from pumping or bending. For the moment Im thinking of 8mm for the Mizzen (might be a bit stretchy but at the end of the day it is only the mizzen and normally loads are low because it doesnt have a genoa). RM30 is the force that is required to heel the boat over 30 degrees. We are ruling this one out for us. The boom will rise again when we tension the reef line and this rarely even needs the boom to be helped by hand. But without mast height I suppose this is only partly covering the shroud angle issue? If you would like to measure your rigging yourself proceed to step 5. Boat Design Net does not necessarily endorse nor share the view of each individual post. Replacing your turnbuckles. Save my name, email, and website in this browser for the next time I comment. We also attached spinnaker halyards one to the left and one to starboard to an eyebolt. That is, the turnbuckles had not been hooked and tightened at the same simultaneously on lower and upper thread. Their page (from 2015) Before Ordering Your Colligo Dux Rigging links to a PDF table for sizing. Unfortunately, there are not always visual clues that your rigging has passed its life expectancy. As mentioned, runners can be used in different ways. For 6.5mm stainless steel the breaking strength is 3220kg. On a boat like yours with single uppers and double lowers, the uppers see about 45% of the load and . From the Rigger: We are so glad you asked! Finally, the role of the D2s in counteracting or favouring the bend between the first set of spreaders and the masthead. 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. 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 tension gauges are especially designed for accurate, repeatable tuning of a sailboat's standing rigging. Here are a few suggestions. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. Calculate the length of bury. Replacing Your Rigging | Cruising World 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/. Good question. That's a little high because it's using the combined capacity of the lowers and reality will have them loaded differently. 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. Differences emerged immediately, the D1 on the left was about 1cm shorter than the one on the right. Once on deck I noticed that the mast was much better already, the forestay was tighter, even though we hadnt touched the V1s at all. This is a very inexpensive investment (by yachting standards ) to ensure that your rig is in sound condition. A high-performance racer might require a lighter, stronger, lower stretch (i.e. 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 . Give us a call, and we can give you a rough quote. Stainless steel isnot a malleable metal, so the pressure applied by the roller dies is exceptionally high, creating a solid bar of material. Learn how your comment data is processed. Having to remember this T-bone day and night in every situation is not the best of proposition. The de-multiplication of the runner pulleys obviously amplified the effect on the control line. I could measure the rake with a bucket, but I had somewhat of a historical memory of the setting of that mast. Once swaged, the terminal cannot be re-used or positionally adjusted. The rig of this boat is not particularly extreme or delicate, being the Class40s designed for great ocean navigation. zurich insurance sydney webpack exclude node_modules moorage on lake washington hockeygymnasium stockholm halfords power steering fluid is bowers a gypsy name. 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). And if in doubt, too long is always better than too short! Both operations improve upwind performance. When buying new running rigging (i.e. Thanks, very interesting and helpful.
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