In particular, the curvature between the first set of spreaders and the masthead increased. 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. Lay out the wire and attach one end of your wire segment to a secure fixed point. 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 these are too soft the mast will sag to leeward between the first spreader and masthead. 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 The second is a calculation based on the current rigging size. Historically, the most traditional rig type is the masthead one. Running Rigging Calculator All you do is select your boat model and our calculator instantly specs the size and lengths that will work for you. Is it maybe, just maybe possible that they have cornered the market on synthetic standing rigging through a, Location: Bas Caraquet, New Brunswick, Canada. We will talk here specifically about boats with swept back spreaders. 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] ). 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. I relied on my historical memory and everything seemed to me in order. How to use Tension Gauges - Loos & Company, Inc. Working the 10M rigging figures backwards can give the safety factor Pearson applied to the 10M. more expensive!) A boat with bad rigging is at best a pain in the #@$ and at worst a lethal weapon. Despite that, they do all agree that Dyneema needed to be sized for Stretch rather than for Strength. Spinnaker Sheet / Guy - Boat length x 2. So we are looking at approx 6500kg breaking strain Dyneema. 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). You cant cut corners and get the same results as the pros. 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. The current shrouds are 5/32" diameter. Know the sizes and lengths you need? For a C&C 115, making the mast out of carbon and going with somthing other than SS wire, save IIRC from a magazine article. 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. Others, such as Mr. E.Sponberg, make other distribution of forces. The rake depends on the relationship between the length of the forestay and the shrouds as a whole. I ran the numbers for the 10M by methods from three sources starting with David Gerr's book "The Nature of Boats." Using Colligo's stretch calculator it looks like I should go with 5/16 and 1/4" Dyneema respectively. All in all it will probably only change your solent to staysail switch point by a knot of wind or two. The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. The lazy rigger screws the turnbuckle on deck a few turns so that he has only to hook the vertical shroud, the V1. By giving the D1s a few symmetrical left-right turns we were able to straighten the lower part of the mast. Can you break it down for me? 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/. One area still to be worked out is how much length to allow for creep. standing rigging size calculator - jusben.com On a boat like yours with single uppers and double lowers, the uppers see about 45% of the load and . Rigging size | SailNet Community The listed prices for standing rigging by model reflect the rigging shown in our diagrams. Decide which you want (no doubt Colligo has a guide for bury amounts of their DUX). For a -inch turnbuckle with a -inch toggle, the chainplate should be at least inch thick. When I arrived on this boat to check the mast, there were two problems noticeable with the naked eye. If in doubt, get a professional opinion. If it does not rotate, spray some WD40 but never twist the rod rigging. For a rod of the size we were adjusting we needed a large and very expensive tension measurement tool. It also has a module for calculating continuous beams and large facilities for manage the various materials used in the construction of modern boats. This explained why the mast started veering to the left. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. 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. For the moment I wanted to see the mast without no tension in the D2s. N.B Selden T terminals are a similar size and shape to the Hasselfors Flat Head design. Graham Radford Yacht Design, STABILITY DISCUSSION, total shroud breaking strength (1.2 * disp). Measure your wireIt is important toestablish the diameter of your wire becauseall the different types of wire terminationare manufactured with specific dimensionsfor each diameter. 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). Maybe I was being a bit hyperbolic when i said that dude was 3x the amount of competitors. 3/16" for lower shrouds is also what I had. Cunningham - Boom length x 1. Want to prolong the lifespan of your rigging? I.e. A UK Chartered Engineer and Fellow of the Institution of Mechanical Engineers he has, since 2001, managed the rigging engineering group at Bechtel. Required fields are marked *. The spring-loaded ones suitable for adjusting the shrouds of a Mini 650 are useless. This is especially important for the forestay attachment if it is an integral part of the stemhead fitting. That is, it is no longer one of the elements of the standing rigging (albeit adjustable). Control Lines: Outhaul - Boom length x 2. We start by calculating the designed tension of the shrouds by assuming it is no more than 20% of the breaking strain of the stainless steel. There is no one-size-fits-all with running rigging. Rigging Calculator on the App Store 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. We also attached spinnaker halyards one to the left and one to starboard to an eyebolt. ). 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. Mast and Rigging calculations | Boat Design Net NE ropes has STS-HSR. Global Solo Challenge Copyright 2022. 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. Factors you must consider include: Type of hitch/method of rigging. Here are a few suggestions. Can Galvanised Steel be used with Stainless Steel? Please do. The standing rigging is all rod on this boat. Sailboat Standing Rigging | RiggingAndHardware.com The swept back spreaders ensure that the mast can stand up even without the backstay, which is no longer structural. Beam Load Calculator Thanks John. The goal is to give the mast a beautiful shape that does not have strange kinks in its curvature and especially any inversions etc. They are all full re-rigs from 119 wire with new rigging screws (please note all examples given are for supply only): 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). Imagine bearing away, removing the genoa and hoisting a large spi. The boat was in the water, we first had to avoid the risk of unscrewing a turnbuckle and accidentally unhooking a shroud. 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. The Dyneema sizes can all be 10mm except the Liros D Pro Static [DFM20] which would need to go upto 12mm (no 11mm available). 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? Hey all, I'm going to do my standing rigging myself with Dyneema using thimbles and dead eyes. Choose the profiles, suppliers and materials from the database 3. For 8mm stainless steel the breaking strength is 4640kg. So in all fairness, I was trusting my eyes. This is the figure I used in the formulas below. The influence of forestay-V1 and D1 on the bend of the mast up to the first spreader. 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 price difference of the DM20 lines over SK99 or SK78 is still huge. Swaged terminals are manufactured using 1 or more of the 4 processes listed above. We do support educated do-it-yourself sailors if you are confident and understand the rigging process. Perform routine cleaning/polishing to remove corrosives, identify chafe points and other damage, and properly tune your standing rigging (shrouds, forestay, backstay). Check your spreaders, chainplates and turnbuckles for cracking, fatigue, missing cotter pins/rings, etc. Plus there will be more spare strength if there is UV or Chafe damage. As you size up creep and stretch will always be reduced. 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). My experience with 2 different 28.5 footers that I have owned is that 7/32" for headstay, backstay, and upper shrouds are very sturdy. Assuming it fits in our racks and we have room, we may be able to avoid mast lay day charges by storing your mast here at Rigworks. Then we can help you fine-tune your rope selection and length before cutting. Asymmetric Spinnaker Sheet - Boat length x 2.5 to 3. It is important to use a tape measure under tension and that does not stretch. 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). That is with the forestay and backstay attached to the masthead as fixed standing rigging that create traction in the opposite direction. This is our highest recommendation to make sure your rig fits properly. For a -inch turnbuckle and toggle, a minimum thickness of. RIMAST - Masts and Riggins Calculations If a rigging screw is supplied as part of a finished wire, the measurement will be made with the screw two thirds open as shown below. The checkstay, on the other hand, usually points where the foresail forestay attachment is located. This also serves as your pin center measuring point. The pre-bend, at a given a setting of the V1s, is controlled by the tension of the D1s and D2s. Standing rigging has been our specialty for over 40 years. With proper measurements (wire diameter, pin sizes, wire lengths), we can give you a very accurate price for the standing rigging itself, but there are often unforeseen complications during the job (bad spreaders, corroded mast bases, hardware that is stripped on the mast, frozen pins, chainplates that are failing, etc.). But without mast height I suppose this is only partly covering the shroud angle issue? 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. We are not experts but just trying to show our thinking processes. Add that amount for each splice (it won't amount to even 36 feet in either case), plus the distance around the thimble. This especially with loose D2s that do not prevent the section above from bending forward. First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. Despite the absence of a backstay its not runners or checkstays that keep the mast up. Runners attachments seen from the mast top Although the mast is made of carbon rather than aluminium, the rig is the same as that of a Mini 650 Pogo2 from Structures shipyard. The standing rigging is all rod on this boat. Having worked and checked with runners and checks the sea trial was more for the pleasure of ending the day with some sailing. So we had left-right and fore-aft problems. With a masthead rigged boat, the backstay can be used to increase forestay tension in high winds. In addition to this it was clear that when the starboard runners and checkstay were tensioned, the mast deteriorated in shape. 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. Tapped and Formed:Some Swage and Swageless terminals are made of several components.These partsmay be tapped together like the strap toggles below. Replacing your turnbuckles. 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). So we can put back the T-bone that shortens checkstay and use it as a counter cable for the inner forestay. 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. Each complete turn corresponded to approximately 3-4 millimetres in length. That is, the turnbuckles had not been hooked and tightened at the same simultaneously on lower and upper thread. 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. In our case the mast bent too far forward and the forestay was particularly soft. This type of rig is fitted with a runner at the mast top and a checkstay at the height of the inner forestay. My guess is 3/8". See other options in diagram to the right. Thethickness of the chain plate - check that the new fork is wide enough to fit over the chain plate, but not so wide as to cause a pinpoint load or allow too much lateral movement. Herb suggests under 15% or even better under 10%. The amount of rake optimal rake is usually provided by the designer so you can do this job with absolute precision. On boats with swept back spreaders, runners and checkstays are not structural. I have to study the correct way to approach this problem. Not only will your rig last longer when properly tuned, your boat will sail better, and who doesnt love that! From them we get either 7 or 9mm for the Mizzen and 11mm for the main. In this article we will deal with the tuning of standing rigging of a typical sailboat. 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). Selecting Rope - Length, Diameter, Type - RIGWORKS INC. We gave the forestay one more turn and removed a turn from the V1s and we were satisfied. The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. The benefits are less windage and less weight aloft. Give us a call, and we can give you a rough quote. From the Rigger: Lets play Name that Stay Forestay (1 or HS) Read more, Question: Do you have guidelines for selecting halyards, sheets, etc. Condition of sling - passes all inspection criteria. This on a mast with two sets of spreaders. Check the deck around the chainplates and mast for cracking and delamination. Stretch the wire straight and ensure there are no bends in the wire. He asked Isnt the industry standard just a ploy by manufacturers to sell more wire. To do this we tighten the runner with the checkstay lashing very short to start with. So you cant simplify this by saying to keep the working load below a certain percentage of break strength. Atticus Update 66: Calculating wire size for standing rigging We had no doubts having already simulated the effort with checkstays. With proper measurements (wire diameter, pin sizes, wire lengths), we can give you a very accurate price for the standing rigging itself, but there are often unforeseen complications during the job (bad spreaders, corroded mast bases, hardware that is stripped on the mast, frozen pins, chainplates that are failing, etc. I.e the mast will go backwards to the first level of spreaders then stard bending forward from there to the masthead. The inner forstay and the staysail come up in about 16 knots of wind. For example, for ocean-crossing boats, runners and checkstays help stabilise the mast and prevent it from pumping or bending. only hand tools are required for installation, can also be completely disassembled and reused (some models require inner cone replacement) providing great longevity, can be manufactured to very precise tolerances, the waste material can be recycled to create further parts. Braided line density is the key to eliminating constructional elongation over time. One thing I would like to add is the reasoning behind using Dyneema SK75 that is heat stretched for standing rigging Vs the new chemistries like SK90 and SK99 that are heat stretched. Do it yourself Standing Rigging Quotes - Jimmy Green These are boats where you usually an average setting and not touch it before a specific event. Heat stretched SK75 really performs better under a constant load. 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. And if in doubt, too long is always better than too short! 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. Wire rope is sized/priced by its diameter which . Once you know the diameter of the wire, it will give you the load both in kg and as a percentage of its breaking strain.

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