standing rigging size calculator standing rigging size calculator

There isnt even a topping lift to support the boom when reefing. Establish the thread size, type and directionWire terminals that have a thread for connecting to the next component are known as studs.Stud terminals are denoted first by the wire diameter and then the thread type and size because each wire diameter can have more than one thread option.The thread options are generally referred to as downsize, standard and upsize - these are broadly categorised in the same way by all the manufacturers.UNF thread is the most common in the UK, but Metric is always a possibility - bear in mind that the yacht or the mast may have originally been built in Europe where metric threads are more prevalent.Stud terminals are normally Right Hand thread but it is worth checking, especially if they are metric thread on a French built mast. The other positive about Dynice DUX is that it is only slightly more expensive than Vectran or Dyneema, vs. PBO which is incredibly expensive. 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. Attachment to the Mast, the top terminals. 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. With a masthead rigged boat, the backstay can be used to increase forestay tension in high winds. After attempting to sort through the many personal. This allows us to run high and increase mast bend with a full mainsail. Boat Design Net does not necessarily endorse nor share the view of each individual post. We have also said that the mast of a Class40 is not quite so bendable and adjustable. As said, the backstay is simply not there, to make room for the square top mainsail. The line is also lighter and it doesn't absorb water, as compared to Vectran. The listed prices for standing rigging by model reflect the rigging shown in our diagrams. Wire rope is sized/priced by its diameter which . They show up on your doorstep ready to use. Write down the number and move on to the next stay. Historically, the most traditional rig type is the masthead one. Heat stretched SK75 really performs better under a constant load. A DIY Solution to Tired Standing Rigging - Sail Magazine Excuse me the question, stays should be placed in a "free-standing mast"?. That is with the forestay and backstay attached to the masthead as fixed standing rigging that create traction in the opposite direction. So these are the sites Ive found most useful in working sizes for our boat. We repeated the exercise for the low diagonals D1s. This can be estimated with the boat's beam, ballast, draft, and displacement. With this procedure we were able to restore a situation where the two V1s shrouds were the same length and with the same adjustment. Replacing Your Standing Rigging - RIGWORKS INC. Do it yourself Standing Rigging Quotes - Jimmy Green As mentioned, runners can be used in different ways. This post has taken an age to research and write. 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. Jimmy Green Marine commonly supply 3 types of rigging screw for standing rigging.These are sometimes referred to as bottle screws or turnbuckles. 1/4" is usually 7/16" or 1/2". First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. This yields a shroud load of 6,000 pounds. 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. 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. 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. says the wire was 1/4". The benefits are less windage and less weight aloft. 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. Stainless steel isnot a malleable metal, so the pressure applied by the roller dies is exceptionally high, creating a solid bar of material. there is no M11 size. The influence of forestay-V1 and D1 on the bend of the mast up to the first spreader. Those details about the differences of heat stretching at Fibre vs braided level are hard to come by. Maintain your standing rigging! The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. 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. Differences emerged immediately, the D1 on the left was about 1cm shorter than the one on the right. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. Or maybe a lot of other boats are under-rigged? If they are not willing to take the financial risk, are you willing to risk yourself and your crew? The Bluewave turnbuckle (bottom) is for racing enthusiasts who want to easily adjust settings on the water. So unless you had to do a short inshore event with light airs predicted changing the setting for each and especially longer races makes no sense. Before adjusting them, however, we could use them to do a test on the adjustment so far of our mast. 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. Not forgetting the compression loads from the stays too. 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. On some boats a loop with T-bone is is used to shorten the checkstay lashing by a few centimetres. However, DynICE Dux is now back in the running, and with the possibility of 9mm for the Mizzen for about the same price as the 8mm Liros D-Pro-XTR. You can use a large nail or screw on the dock. 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. We had created a perfectly straight mast track, an adequate rake and a pre-bend. What does all this mean? The next two methods are basically the same but use slightly differnt load levels for the shrouds. Lift-All makes no guarantees that the information provided in the calculator is correct. 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? For the Main Im thinking 12mm (larger than either the Colligo and Rigging Doctor calculations) and the largest size of Liros D-Pro-XTR available). If in doubt, get a professional opinion. By completely eliminating the backstay from the the list of elements constituting our standing rigging, which presented itself as an obstacle to increasing the roach of a mainsail, it is now possible to have all the roach we want and even square top mainsails. Our riggers can also tune your rig, either at the dock or under sail. Ive taken the stainless breaking limits from the Marlow table off Jimmy Green (see above). I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. If your running rigging leads back to the cockpit . 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. Standing Rigging CalculationBack to Rigging By appearances the 10M is a very heavily rigged 33 footer. I'm a little confused. It is based on our specific boat and shares our thinking for our uses. A high-performance racer might require a lighter, stronger, lower stretch (i.e. Add that amount for each splice (it won't amount to even 36 feet in either case), plus the distance around the thimble. The original spec. Want to prolong the lifespan of your rigging? But without mast height I suppose this is only partly covering the shroud angle issue? But these are for breaking strength of the wire. 1x19 Wire Rigging Stainless Steel 1x19 Wire Rope Rigging is the most popular solution for standing rigging on cruising yachts. 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. 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. 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 backstay is both an element of the standing rigging but can also be tuned. We are happy to help you pick the best rope for your application. 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 goal is to give the mast a beautiful shape that does not have strange kinks in its curvature and especially any inversions etc. We are confident that you will look forward to our emails. Finally, should you decide to sail with that old rigging, consider checking out the Ask the Rigger article titled Rigs Fail Are You Ready? at http://rigworks.com/rigs-fail-ready/. Effect of angle on capacity. This is the same both on Mini 650s and on Class40s. Give us a call, and we can give you a rough quote. SCT also includes various modules to perform calculations ISO 12215-6, 8 and 9. You can also see our newsletter archive here, How to Identify and Specify Your Standing Rigging Components, LIROS Polypropylene Floating Mooring Warps, LIROS Super Yacht Mooring Polyester Docklines, Mooring Lines - LIROS Recommended Diameters, Mooring Warp Length and Configuration Guide, How to estimate the length of a single line Mooring Strop, LIROS 3 Strand Polyester Spliced to Chain, LIROS Octoplait Polyester Spliced to Chain, G3 Calibrated Stainless Steel Anchor Chain, The Jimmy Green Guide to the Best Anchor Ropes, Anchor Rope Break Load and Chain Compatibility Chart, Calibrated Anchor Chain - General Information, Calibrated Chain - Break Load and Weight Guide, Galvanising - Managing Performance and Endurance expectation. In the Toss method 25% load was used for each lower shroud to match his example. 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. The t-bone extra adjustment will not give you extraordinary gains and advantages upwind as theres only so much extra bend you can put in with a runner and loose checkstay. RM30 is the force that is required to heel the boat over 30 degrees. We are ruling this one out for us. We had no option but to intervene by shortening the forestay, which in this case was adjustable. From them we get either 7 or 9mm for the Mizzen and 11mm for the main. only available on wire up to 6mm diameter, because larger diameters are not flexible enough to turn around the tight radius of a thimble without detrimental deformation, the most economical method for professional wire termination, Ideal for fittingonto oversized pins andattachment points with the additionofa stainless steel thimble, can also be used to form a loop for masthead attachment. The de-multiplication of the runner pulleys obviously amplified the effect on the control line. And both say having lowers at least the same size as uppers is a good idea. Asymmetric Spinnaker Sheet - Boat length x 2.5 to 3. 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. To preserve the left-right adjustment symmetry, we unscrewed the V1s turnbuckles two full turns each side. This can be measured by hanging a full bucket of water on the main halyard and letting it hung just above the deck. There seems to be a lack of information on the web about the sizing for standing rigging. Replacing your turnbucklesCheck the thread size (standard or upsize)Select a turnbuckle which provides articulation e.g. Atticus Update 66: Calculating wire size for standing rigging The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. On this Class40 the runner was attached to the first pulley and therefore its length was a given and could not be adjusted. 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. 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. Speaking of standing rigging we have to open a parenthesis on the types of rigs possible for a sailboat. I have a ketch with 1/4" SS on the main and 3/16" on the Mizzen. It was clear, however, that we had moved the mast head forward several centimetres and the excess rake was gone. See other options in diagram to the right. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. So in all fairness, I was trusting my eyes. They are adjustable both to raise the boom in port and to put them at rest during navigation. And if in doubt, too long is always better than too short! It is important to use a tape measure under tension and that does not stretch. For decades now, however, fractional rigs with swept back spreaders have been increasingly widespread. For a -inch turnbuckle and toggle, a minimum thickness of. For a -inch turnbuckle with a -inch toggle, the chainplate should be at least inch thick. This is because upwind mast is fully loaded at just 15-16 knots after which you need to reduce sail. Check that everything is straight and true. Add splices, shackles, and whipping with a single click. From Marlow Ropes we have this: Others refer to Elastic Stretch, Constructional Stretch and Creep. When measuring rigging, the convention is to measure from pin center to pin center or from bearing point to bearing point. 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. Then it made a bend to the right and then back to the left between the second set of spreaders to the masthead. RIMAST - Masts and Riggins Calculations 50 or so lbs up in the air, which translated to 200 less rail meat lbs! If it does not rotate, spray some WD40 but never twist the rod rigging. This was not the case before, with a perceptible difference of several degrees. The eye will serve as your pin center. Search by manufacturer's part # or brand. These additions add up quickly and affect the cost of parts, labor, special order shipping, taxes, etc. 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. Continuous rigging is made up of single pieces of wire that run from the top of the rig to the deck allowing the tuning to be done at deck level. The rake depends on the relationship between the length of the forestay and the shrouds as a whole. We do support educated do-it-yourself sailors if you are confident and understand the rigging process. With the boat in the water and not wanting to take any risk, we didnt want to get to unhook any turnbuckle. The port V1 was 2cm shorter than the starboard V1. for my sailboat? Unstep the mast and remove the rigging from the boat. Imagine bearing away, removing the genoa and hoisting a large spi. Threaded Bronze Inserts ensure superb adjustment without seizing or galling and the swivel toggle action allows full articulation in two planes. We also set runners and checkstays just for safety. Both are based on the this formula: RM30 is the righting moment at 30 degrees heel 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. The wind was not much but enough to load the mainsail close-hauled and verify that the mast remained straight. Maybe the 10M is not so over-rigged as it appears. Hence, we have non-structural runners and checks, no backstay and no topping life. Lets go up whenever there doubt. I jibed without runners in 50 knots of wind and nothing happened. This is especially important for the forestay attachment if it is an integral part of the stemhead fitting. What is meant when we say they are structural? standing rigging. All rights reserved. I relied on my historical memory and everything seemed to me in order. Your email address will not be published. Taking 70% of the lower shroud capacity gives a safety factor of 3.4. Measure your wireIt is important toestablish the diameter of your wire becauseall the different types of wire terminationare manufactured with specific dimensionsfor each diameter. Can you break it down for me? standing rigging size calculator. Designers typically specify standing rigging and attachments, including bolts, that are 1.3 to 1.4 times stronger than the calculated load. 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 :-). The Gerr method seems to go a bit smaller but all of them are smaller than the OEM rigging on the 10M. 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. a) we need to replace the mizzen rigging before we launch b) there is no dock or anything at the boatyard so difficult to do c) Im not sure how this would work for a mizzen mast as it is shorter and so far aft, therefore it would be very difficult to heel the boat that far with just the mizzen and not very typical of the mizzen usage. Before tightening the forestay, however, I wanted to loosen the the V1s a little so as not to induce further compression in the mast. The bend instead arises from compression of the mast given by the tension of the V1s, these pull down the mast that bends forward. Driscoll Boat Works and Shelter Island Boat Yard are both within walking distance of Rigworks. Running rigging - SailboatOwners.com 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). Most lines are pre-stretched. Since it was not me who had mounted the mast, I could not be sure that the turnbuckles had been inserted correctly, i.e.