Chainplates Revisited - Practical Sailor The spreaders, in this case, are in line, perpendicular to the fore and aft axis of the boat. Tapped and Formed:Some Swage and Swageless terminals are made of several components.These partsmay be tapped together like the strap toggles below. 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. If I were only using turnbuckles for tensioning then I might have gone for DM20 to avoid running out of tensioning due to creep. Two full turns lengthened the V1s by 7-8mm and the impact was visible to the naked eye. So we can put back the T-bone that shortens checkstay and use it as a counter cable for the inner forestay. 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. Before tightening the forestay, however, I wanted to loosen the the V1s a little so as not to induce further compression in the mast. If I were to replace with stainless I'd be looking at a total of 310 feet of 1/4" SS for the main and 120 of 3/16"SS for the mizzen 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. You cant cut corners and get the same results as the pros. Stretch the wire straight and ensure there are no bends in the wire. Some say 52 diameters, other prefer 72 diameters. All rights reserved. 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. Good question. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. When measuring rigging, the convention is to measure from pin center to pin center or from bearing point to bearing point. It was clear, however, that we had moved the mast head forward several centimetres and the excess rake was gone. How to set up your rig: tension your shrouds on masthead or - PBO If they are both too tight the mast becomes straight like a telegraph pole losing its beautiful shape. So these are the sites Ive found most useful in working sizes for our boat. We have a huge rope wall at Rigworks and are very proud of our selection and expertise. Usually they are made with dyneema and not just simple polyester. 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). Selecting Rope - Length, Diameter, Type - RIGWORKS INC. Our riggers can also tune your rig, either at the dock or under sail. Others, such as Mr. E.Sponberg, make other distribution of forces. Stainless does not like to be deprived of oxygen, so keep tape off your rigging to avoid anaerobic corrosion. At this point many of our customers choose to ship their rigging to our shop in Miami Florida where we will duplicate it exactly. Not forgetting the compression loads from the stays too. The list of materials and design stresses are those that ISO 12215-5 standard says that can be used. Rust and discoloration can indicate the location of a crack or crystallization of the metal. We removed two more turns from the V1s and took them back at the forestay. Factors you must consider include: Type of hitch/method of rigging. It is important to use a tape measure under tension and that does not stretch. I replaced 3/16 rigging with 5/16 dynex dux and it's still ok after 10 years. 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. What does all this mean? 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. 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. Excuse me the question, stays should be placed in a "free-standing mast"?. Load Calculator - Stren-flex Do it yourself Standing Rigging Quotes - Jimmy Green Staying within elastic limits gives safety factors of 2.5, 2 and 1.9 respectively. Not only will your rig last longer when properly tuned, your boat will sail better, and who doesnt love that! Jordan freshens up on his high school math to calculate what wire size we should order for our new standing rigging. Type in the parameters 2. 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. Whats up? Let us go over your rig from top to bottom and end to end to identify trouble before it gets worse. 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). You can use a large nail or screw on the dock. Generating 3D hull using only picture of boat. [Update] or 9mm DynICE Dux for the Mizzen and 12mm for the Main. 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. rope than a cruiser. Using a fiberglass or steel tape measure, measure the distance from pin-center to pin-center or bearing point to bearing point as applicable. Seen from the side, the mast showed excessive rake and pre-bend that needed correcting. The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. Therefore, except in exceptional cases, starting from this assumption is more than reasonable. 50 or so lbs up in the air, which translated to 200 less rail meat lbs! It is based on our specific boat and shares our thinking for our uses. I therefore decided to tighten further the D1s by a turn and the D2s by two. 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. 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. Standing Rigging CalculationBack to Rigging By appearances the 10M is a very heavily rigged 33 footer. 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. Driscoll Boat Works and Shelter Island Boat Yard are both within walking distance of Rigworks. 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. The most popular choice is the Stalok version (top) which utilises a chrome-plated, forged bronze body. Plus there will be more spare strength if there is UV or Chafe damage. Everything was in order throwing in a few tacks confirmed that the boat made sailed the same angle to the wind on both tacks. You may need to apply pressure to stretch the wire straight, you may find it helpful to use a line or block and tackle. (contrasted with running rigging). Save my name, email, and website in this browser for the next time I comment. How do I calculate righting moment? - Sailing Magazine It does seem like some competition is popping up here and there for dux. 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. If your running rigging leads back to the cockpit . Then we can help you fine-tune your rope selection and length before cutting. Question When should I replace my standing rigging? Many of our do-it-yourself customers with continuous rigs order their rigging with a swaged terminal at the top of the mast and a Sta-Lok or Hi-Mod mechanical fitting for the bottom so they can fit the rigging on site. So I am going to be adding Hampidjan DynIce Dux into my calculations and it is cheaper than the LIROS D-Pro-XTR, plus available in more sizes. This was not the case before, with a perceptible difference of several degrees. How To Identify and Specify Your Standing Rigging Components - Jimmy Green If you cut heat stretched SK90 or 99, you will get 12 strands that fall apart. If you have a lashing in the design you can have shorter shrouds and a longer lashing so that you have plenty of space to keep tension as creep lengthens the shroud. Website created by. The spreaders are not perpendicular to the fore-aft axis but swept towards the stern on the horizontal plane. The second is a calculation based on the current rigging size. This is considerably less expensive than a full re-rig and, again, may identify issues before they become catastrophic. So 716 * 30 gives an RM30 of about 21,500 lbs. Their page (from 2015) Before Ordering Your Colligo Dux Rigging links to a PDF table for sizing. rope), you will want to consider length, diameter, stretch/performance, material/construction and, of course, price. 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. 1x19 Wire Rigging Stainless Steel 1x19 Wire Rope Rigging is the most popular solution for standing rigging on cruising yachts. In addition, runners reach the masthead. My guess is 3/8". Lets go up whenever there doubt. 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/. He is the engineering, construction and project management specialist company's chief rigging engineer. 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] ). Herb suggests under 15% or even better under 10%. Hole diameter-to ensure the new pins will fit correctly. 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. You agree that your ultimate purchase and use of Lift-All slings must be determined by you to be appropriate for your specific applications. Standing rigging definition, rigging remaining permanently in position as a means of steadying various spars, shrouds, stays, etc. Stretchy is slightly problematic because there are multiple forms and the terminology used isnt consistent. 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). All you have to do is input the span of the beam, the magnitude of the point loads, and their distances from support A. All the vertical tension turned into compression and bend. Hence, we have non-structural runners and checks, no backstay and no topping life. 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. Label all wire segments indicating their position. If you need to replace a halyard, please dont pull it out of the mast. Beam Load Calculator Sailboat Standing Rigging | RiggingAndHardware.com The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. If your design includes lashings (which are normally setup to have plenty of adjustment) then there is only the inconvenience of a tightening a few times initially if you didnt get rid of all the constructional stretch. Since it was not me who had mounted the mast, I could not be sure that the turnbuckles had been inserted correctly, i.e. 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. This is especially important for the forestay attachment if it is an integral part of the stemhead fitting. 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). Maybe the 10M is not so over-rigged as it appears. So in all fairness, I was trusting my eyes. For example, many chainplates are too thin to grip clevis pins correctly. 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. Having said that, even with SK75 creep is easy to design around if you know the creep properties for the material you are using. Swaged terminals are manufactured using 1 or more of the 4 processes listed above. Question: Do you have guidelines for selecting halyards, sheets, etc. This turnbuckle features calibration, one extra-long stud and a fold-out arm to facilitate easy adjustments. We are happy to help you pick the best rope for your application. How to use Tension Gauges - Loos & Company, Inc. Could someone please speak of the advantages / disadvantages of increasing the. Things to look for include corrosion, pitting, cracks, and broken strands or meat hooks on the wire. 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. That has two ways of calculating the size. All in all it will probably only change your solent to staysail switch point by a knot of wind or two. Here are a few suggestions. Chainplates 101: Inspect and Refit | Cruising World Discontinuous rigging is made up of shorter sections of wire that connect to each other at the spreader tips. Make sure your turnbuckle is centered between the studs for accurate measurement. RM30 is the force that is required to heel the boat over 30 degrees. We are ruling this one out for us. 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. The overall rake was still excessive. What is meant when we say they are structural? Website created by Primeconsulting. The flogging of a loose shroud can actually be harder on wire than steady pressure. If your rigging terminal contains a pin remove the pin and use this as your attachment point. Or maybe a lot of other boats are under-rigged? PS Advisor: Rig Loads and Reefing Lines - Practical Sailor The checkstay, instead, was tied to the first pulley with a lashing so that it could be adjusted in length. He asked Isnt the industry standard just a ploy by manufacturers to sell more wire. Hey all, I'm going to do my standing rigging myself with Dyneema using thimbles and dead eyes. 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. The first is the RM30 heeling test to calculate rig loads. 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. I was satisfied with the shape and only the sea trials could have confirmed the correct setting of the D2. Then we choose what percentage of the breaking strength of the Dyneema we want this to be. I see DSM is coming out with DM20 which is a heat treated pre stretched fiber. Tensioning the backstay, the central part of the mast advances forward creating a slight C shape of the mast seen from the side. [End Update]. Measure your wireIt is important toestablish the diameter of your wire becauseall the different types of wire terminationare manufactured with specific dimensionsfor each diameter. A DIY Solution to Tired Standing Rigging - Sail Magazine Although we work closely with the boatyard during the job, you will need to negotiate yard fees (crane, mast lay days, etc.) Continuous rigging is more common on older and more traditionally rigged boats, while newer boats and performance-oriented sailboats often have discontinuous 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. 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. I think that's the real problem to solve. As we were stationary in port and without sails, I could totally ignore the D2s until the end. But, the overall curve of the three sections of the mast was not yet regular. The benefits are less windage and less weight aloft. I found the Colligo information less helpful, it feels to me that they have stayed with the same materials despite the new developments. Running Rigging Calculator - SailboatOwners.com 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. I jibed without runners in 50 knots of wind and nothing happened. Despite that, they do all agree that Dyneema needed to be sized for Stretch rather than for Strength. more expensive!) The inner forstay and the staysail come up in about 16 knots of wind. This is not to say it was already set right, but we had zeroed the lateral tension errors. 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?
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