The terminations for wire vs. rod can be quite different and require a lot of customization. Learn how your comment data is processed. Heat stretched SK75 really performs better under a constant load. The tension gauges are especially designed for accurate, repeatable tuning of a sailboat's standing rigging. 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. Good question. For 8mm stainless steel the breaking strength is 4640kg. Standing rigging has been our specialty for over 40 years. First, we multiply the load by 1.5 to approximate the rest of the righting moment beyond 30 degrees, and divide by half of your 10-foot beam. Of course, a number of factors affect a rigs lifespan including load, sailing conditions, mileage sailed, age, fatigue from cyclic loading, environmental influences such as salinity and contamination, and frequency of care and maintenance. This system with T-bone on the checkstay give you maximum flexibility and is obviously suitable for those who know how to use it. This meant that the V1s tension encountered no resistance to mast compression. Ive taken the stainless breaking limits from the Marlow table off Jimmy Green (see above). Then we can help you fine-tune your rope selection and length before cutting. We have also said that the mast of a Class40 is not quite so bendable and adjustable. From the Rigger According to industry standards, the anticipated lifespan for stainless steel rigging is 10-12 years for wire and 15-20 years for rod. Standing rigging: step by step guide on how to tune it on your sailboat [End Update]. Working the 10M rigging figures backwards can give the safety factor Pearson applied to the 10M. The very fact that the mast remained straight even when runner and checkstay were tightened gave me good confidence that I had already adjusted the D2s correctly. Our calculator is easy and simple to use. Thanks, very interesting and helpful. First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. 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. For example, low stretch is very important in a halyard but not necessarily in a sheet. 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. The second is a calculation based on the current rigging size. Question: My halyard is binding. Maybe I was being a bit hyperbolic when i said that dude was 3x the amount of competitors. Maintain your standing rigging! Check your spreaders, chainplates and turnbuckles for cracking, fatigue, missing cotter pins/rings, etc. To fix a mast like this, with multiple problems, you need to have a method to get to a satisfactory result. Lift-All Sling Length Calculator Agreement | Lift-All Calculating Dyneema for Standing Rigging - Cruisers Forum 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. First we wanted to take care of putting the mast straight and solve the problem of its excessive rake. If the D2s are set correctly setting each pair of runners and checks in turn should not produce any curvature either side from the first spreader to the masthead. (contrasted with running rigging). N.B Selden T terminals are a similar size and shape to the Hasselfors Flat Head design. Not forgetting the compression loads from the stays too. Each mast section is fitted with wire or rod sized to accept the loads generated at that section of the spar. For example, for ocean-crossing boats, runners and checkstays help stabilise the mast and prevent it from pumping or bending. They have been very helpful in responding to email enquiries. Hey all, I'm going to do my standing rigging myself with Dyneema using thimbles and dead eyes. But, the overall curve of the three sections of the mast was not yet regular. Could someone please speak of the advantages / disadvantages of increasing the. We've reduced the choices to a minimum to make ordering as simple as possible. Z-Spars, Isomat.Opposite UNF thread is very rare and will entail changing the whole turnbuckle to avoid a bespoke solution. Hi Dave, Thanks for your very thorough synopsis of using Dyneema for standing rigging. The Supajust Eye Toggleand Swage (bottom) is a high specification stainless steel open body turnbuckle. How to Measure Standing Rigging - Sailing Services It is based on our specific boat and shares our thinking for our uses. Two full turns lengthened the V1s by 7-8mm and the impact was visible to the naked eye. A customer came into our shop the other day to discuss his 33-year old rigging. The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. 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. The lazy rigger screws the turnbuckle on deck a few turns so that he has only to hook the vertical shroud, the V1. 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. 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 explained why the head of the mast pointed to the left after the initial bend. In this article we will deal with the tuning of standing rigging of a typical sailboat. The curve to starboard between the first and second set of spreaders was attributable to the upper diagonal D2 on the starboard side, which was tighter than the left one. The port V1 was 2cm shorter than the starboard V1. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. See more. Want to prolong the lifespan of your rigging? In addition to acting as a support for the mast in general, it allows you to decrease forestay sag without adding compression to the mast. I found the Colligo information less helpful, it feels to me that they have stayed with the same materials despite the new developments. Discussion in 'Software' started by TANSL, Feb 11, 2016. Stainless does not like to be deprived of oxygen, so keep tape off your rigging to avoid anaerobic corrosion. This App is a tool that facilitates the calculation of basic rigging, weights of different profiles, and centers of gravity of composite loads. Stainless Steel Wire Rigging and Wire Rope - Jimmy Green The spreaders are not perpendicular to the fore-aft axis but swept towards the stern on the horizontal plane. 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. One seemingly easy option is to over-size. Continuous rigging is more common on older and more traditionally rigged boats, while newer boats and performance-oriented sailboats often have discontinuous rigging. There is nothing more expensive than a cheap boat! Mast and Rigging calculations | Boat Design Net On this boat only the V1s on deck are adjustable, the rest of the shroud is of fixed length. 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. This was not the case before, with a perceptible difference of several degrees. So in all fairness, I was trusting my eyes. I will analyze your calculations carefully. Whats up? 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.
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