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. We have a huge rope wall at Rigworks and are very proud of our selection and expertise. 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). Shaking the furled headsail gives an idea of the tension of the forestay. Its a popular model of Class40, a first generation Akilaria RC1, designed by Mark Lombard, from around 2006. 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. As you size up creep and stretch will always be reduced. If it does not rotate, spray some WD40 but never twist the rod rigging. Still the biggest name that we have found producing fittings for Dyneema rigging. If these are too soft the mast will sag to leeward between the first spreader and masthead. This is mostly a problem if you only use turnbuckles due to their limited range. This means that when the main halyard is released, the boom falls onto the coach-roof. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. And both say having lowers at least the same size as uppers is a good idea. The Hamma Spoon and Petersen Shroud terminals are designed as direct replacements for the discontinued Navtec T-terminal. It also has a module for calculating continuous beams and large facilities for manage the various materials used in the construction of modern boats. N.B Selden T terminals are a similar size and shape to the Hasselfors Flat Head design. This will help to prevent metal fatigue.Check the dimensions of the fixing points for your shouds and stays, traditionally known as Chain Plates: The picture below shows a swageless eye terminal (top), a Talurit eye (middle), and a swageeye terminal (bottom).Swageless terminals are characterised by a short overall length and a relatively wide body diameter.Taluritis the process ofpressing the wirein a soft copper ferrule.Swages are slim and relatively long overall. This especially with loose D2s that do not prevent the section above from bending forward. 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. Taking 70% of the lower shroud capacity gives a safety factor of 3.4. Our riggers can also tune your rig, either at the dock or under sail. By now, I would say, even on cruising boats it is one of the most common rig arrangements. Lower Fore St, Beer, East Devon, EX12 3EG. What does all this mean? After that I went back to looking at the mast track and, no wonder, the mast was perfectly straight on the left-right axis without any curvatures. I was satisfied with the shape and only the sea trials could have confirmed the correct setting of the D2. This App is a tool that facilitates the calculation of basic rigging, weights of different profiles, and centers of gravity of composite loads. We had no option but to intervene by shortening the forestay, which in this case was adjustable. I.e., that the problems were only in the adjustments of the turnbuckles. So we had left-right and fore-aft problems. Discontinuous rigging is made up of shorter sections of wire that connect to each other at the spreader tips. lol. This type of rig, nine tenths fractional, has two orders of spreaders. The rig of this boat is not particularly extreme or delicate, being the Class40s designed for great ocean navigation. standing rigging. Beam Load Calculator 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. 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. Using our beam load calculator. Thanks, very interesting and helpful. Hi Dave, Thanks for your very thorough synopsis of using Dyneema for standing rigging. As we were stationary in port and without sails, I could totally ignore the D2s until the end. Perform routine cleaning/polishing to remove corrosives, identify chafe points and other damage, and properly tune your standing rigging (shrouds, forestay, backstay). Taking the upper and a single lower of 5/16" gives a safety factor of 3.1. 1x19 Wire Rigging Stainless Steel 1x19 Wire Rope Rigging is the most popular solution for standing rigging on cruising yachts. There isnt even a topping lift to support the boom when reefing. Measure your wireIt is important toestablish the diameter of your wire becauseall the different types of wire terminationare manufactured with specific dimensionsfor each diameter. The line is also lighter and it doesn't absorb water, as compared to Vectran. That said, they play a very important role they help provide additional support for the mast. Z-Spars, Isomat.Opposite UNF thread is very rare and will entail changing the whole turnbuckle to avoid a bespoke solution. If your rigging terminal contains a pin remove the pin and use this as your attachment point. 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. Check the thread size (standard or upsize) Select a turnbuckle which provides articulation e.g. If your running rigging leads back to the cockpit, remember to account for that in your length. Lay out the wire and attach one end of your wire segment to a secure fixed point. Standing Rigging - Cable Loft Creep will mean your rig needs re-tensioning over time. The choices get more tricky as Liros dont make every size (no 7, 9 or 11mm). To reduce the bend we had to reduce tension of the V1s but also monitor the tension of the D1s. The second is a calculation based on the current rigging size. 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. This turnbuckle features calibration, one extra-long stud and a fold-out arm to facilitate easy adjustments. These are boats where you usually an average setting and not touch it before a specific event. Set sail with the benefit of Team Jimmy Green expertise. The Dyneema sizes can be the same as for the 6mm Stainless above except that the Marlow M-Rig Max (DM20) might be better in 8mm. This is a very inexpensive investment (by yachting standards ) to ensure that your rig is in sound condition. 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. says the wire was 1/4". Stainless Steel 1x19 Wire Rope Rigging with KOS Wire - Jimmy Green I therefore decided to tighten further the D1s by a turn and the D2s by two. 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. The rake depends on the relationship between the length of the forestay and the shrouds as a whole. In this article we will deal with the tuning of standing rigging of a typical sailboat. Having to remember this T-bone day and night in every situation is not the best of proposition. Marlow recommend one thing, Colligo another, they both swear by the logic! [Update]See the first comment below from John Franta, Colligo Marine where he explains the difference between heat stretching at Fibre level (SK78 and SK99) vs at the Braided level (SK75). PS Advisor: Rig Loads and Reefing Lines - Practical Sailor Let us go over your rig from top to bottom and end to end to identify trouble before it gets worse. I have to study the correct way to approach this problem. On DayBoats, Trailer Sailers and small yachts, a standard 1x19 wire can be bent around a stainless-steel thimble and Talurit pressed into position using a copper ferrule. From Marlow Ropes we have this: Others refer to Elastic Stretch, Constructional Stretch and Creep. 50 or so lbs up in the air, which translated to 200 less rail meat lbs! 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. 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. Some say 52 diameters, other prefer 72 diameters. 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. The de-multiplication of the runner pulleys obviously amplified the effect on the control line. First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. Unstep the mast and remove the rigging from the boat. The checkstay, instead, was tied to the first pulley with a lashing so that it could be adjusted in length. On a Mini 650, to avoid too many lines, and with a boom that weighs a few kilos, nothing replaces the topping lift. 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. Both SK90 and SK99 are heat stretched at the fiber level so that makes them a little more difficult to heat stretch completely at the braided line level. 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.
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