After this introduction, lets move on to a practical case. Certainly distributing the tension between runner and checkstay greatly reduces the load of the standing rigging. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. Also Marlow describes them all and includes comparison charts. Two full turns lengthened the V1s by 7-8mm and the impact was visible to the naked eye. What does all this mean? https://www.ebay.ca/itm/5-13mm-HampiKl3MW1P7_hTkTw. There are additional developments of these three concepts: T-terminals areperhaps the trickiest identification recognition issue that you will face and it is also extremely important to get it right, so that your new terminals seat properly in their appropriate mast slot.The fittings may look similar, but if they are not specified correctly, theymay not fit the slot properly.Even though it may not immediately be apparent, incorrect seating can lead tostainless steel fatiguewhich, in turn, may cause premature failure.If your existing fittings don't seem to matchthe replacements that are available, it will be prudent to fit new, matching plates on the mast. 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] ). For a -inch turnbuckle and toggle, a minimum thickness of. The wire is inserted into the hollow terminal and pulled through a set of roller dies. Calculate the length of bury. With a bent mast the first thing really is to understand was why it is so. 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. We had no doubts having already simulated the effort with checkstays. I.e. I replaced 3/16 rigging with 5/16 dynex dux and it's still ok after 10 years. a toggle fork at the bottom end. We repeated the exercise for the low diagonals D1s. By measuring the total length of the turnbuckles and exposed thread, many things could be deduced. On a boat like yours with single uppers and double lowers, the uppers see about 45% of the load and . 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). It is your responsibility to assure that the slings you use are appropriate for your application. 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 Global Solo Challenge Copyright 2022. Add shackles and splices from our Running Rigging Builder If you cut heat stretched SK90 or 99, you will get 12 strands that fall apart. Their role is not simply to contain the main when dowsing it. That has two ways of calculating the size. Shaking the furled headsail gives an idea of the tension of the forestay. A customer came into our shop the other day to discuss his 33-year old rigging. Rig designers will calculate the optimum length of the unsupported lengths, or . Keeping your existing turnbucklesCheck the thread type (UNF or Metric) the thread size (standard or upsize)and, just to make sure, the thread direction. Staying within elastic limits gives safety factors of 2.5, 2 and 1.9 respectively. I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. Despite the absence of a backstay its not runners or checkstays that keep the mast up. Give us a call, and we can give you a rough quote. Many people believe that only heavily used rigging needs to be replaced, but the continuous flexing of loose wire that is not under load can take a serious toll as well. A change of about 1.5cm that was well noticeable at a height of 20 meters. It is important to use a tape measure under tension and that does not stretch. This will certainly lead to creep issues and probably re-splicing if you use turnbuckles. special care should be taken to ensure that there will be sufficient material left on the tang/eye/plate if youintend toenlarge any holes. So we can put back the T-bone that shortens checkstay and use it as a counter cable for the inner forestay. Deckvests need to be maintained so that Read more, Genoa Halyard (fractional rig) Mast length x 2, Spinnaker / gennaker halyard Mast length x 2.5, Main Sheet Boat length x 2.5 (varies with the mechanical purchase being used), Asymmetric Spinnaker Sheet Boat length x 2.5 to 3, Reefing Line (reef 1) Boom length x 2.5. Taking V1s and D1s and shaking them, hitting them, you get a feel for their. The choices get more tricky as Liros dont make every size (no 7, 9 or 11mm). Reefing Line (reef 2) - Boom length x 3. 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. At first, you will only see fields for two loads (Load 1 and Load 2), but once you enter a value for \small x_2 x2, the fields for Load 3 will show up . 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). Each mast section is fitted with wire or rod sized to accept the loads generated at that section of the spar. Member Album by TANSL | Boat Design Net https://www.boatdesign.net/gallery/albums/member-album-by-tansl.4186/, TANsl https://www.boatscantling-iso-12215.net/, (You must log in or sign up to reply here.). We always look forward to seeing you! Question When should I replace my standing rigging? Looking at the mast from the side you could see a beautiful shape without irregularities that gently curved back. The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. Your email address will not be published. As a side note, alot of people have miss-diagnosed constructional elongation for creep. . And PLEASE do not buy a used boat without a professional rig inspection! The terminations for wire vs. rod can be quite different and require a lot of customization. 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. In our case the mast bent too far forward and the forestay was particularly soft. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. The Hamma Spoon and Petersen Shroud terminals are designed as direct replacements for the discontinued Navtec T-terminal. T-terminal is a generic term for all the different forms of shroud attachment favoured by mast manufacturers, both current and historic - T, T-Bar, Flathead, T-Ball, Stemball, also known as Elephants Foot, Stemball with Cup, Spoon and Shroud terminalare all variations on this theme. Thanks, very interesting and helpful. This should be a warning. 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. 1/4" is usually 7/16" or 1/2". Remove any pins from your terminal ends before taking measurements. We are happy to help you pick the best rope for your application. You're right (I need to think about). Why not schedule annual service as you would with a car? Make sure your turnbuckle is centered between the studs for accurate measurement. He asked Isnt the industry standard just a ploy by manufacturers to sell more wire. Whats up? 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. Overall, if you think you have a part that is not listed here, email a photo to the Jimmy Green Rigging Sales team and we will take a look. Standing rigging has been our specialty for over 40 years. This means that the threads are not screwed in equally. 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. If in doubt, get a professional opinion. 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. Check the deck around the chainplates and mast for cracking and delamination. I think that's the real problem to solve. The other positive about Dynice DUX is that it is only slightly more expensive than Vectran or Dyneema, vs. PBO which is incredibly expensive. But have you ever seen a boat so rigged? Tapped and Formed:Some Swage and Swageless terminals are made of several components.These partsmay be tapped together like the strap toggles below. Does anyone know if 5/32" is the factory size? For 8mm stainless steel the breaking strength is 4640kg. As mentioned, runners can be used in different ways. Having worked and checked with runners and checks the sea trial was more for the pleasure of ending the day with some sailing. 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). At this point many of our customers choose to ship their rigging to our shop in Miami Florida where we will duplicate it exactly. Once swaged, the terminal cannot be re-used or positionally adjusted. 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. Consider pulling your rig every 5-6 years to inspect the mast base, chainplates, turnbuckles, wire, etc. For example, when setting the runners, it was noticeable that the working points of the control lines had moved by about 20cm. 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. standing rigging size calculator. That is, it is no longer one of the elements of the standing rigging (albeit adjustable). 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. Ive taken the stainless breaking limits from the Marlow table off Jimmy Green (see above). Tightening the left runner-checkstay pair seemed more or less ok. Starboard we clearly had a problem, the mast would bend to windward at the height of the second set of spreaders. 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. 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. Their role is to prevent the mast from bending to leeward between the first and second spreader levels, especially upwind. Maybe I was being a bit hyperbolic when i said that dude was 3x the amount of competitors. Like your car, your sailboat needs TLC. Make sure your turnbuckle is centered between the studs for accurate measurement. The cost to replace standing rigging obviously varies from boat to boat. I have to study the correct way to approach this problem. The Bluewave turnbuckle (bottom) is for racing enthusiasts who want to easily adjust settings on the water. What is meant when we say they are structural? A boat with bad rigging is at best a pain in the #@$ and at worst a lethal weapon. We therefore started by loosening the V1s by two full turns, observing a reduction the bend. I hear about these guys on every forum everywhere. The standing rigging is all rod on this boat. I was satisfied with the shape and only the sea trials could have confirmed the correct setting of the D2. 1/2beam is half of the shroud base width Not forgetting the compression loads from the stays too. 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. The wind was not much but enough to load the mainsail close-hauled and verify that the mast remained straight. NE ropes has STS-HSR. This type of rig is fitted with a runner at the mast top and a checkstay at the height of the inner forestay. I jibed without runners in 50 knots of wind and nothing happened. This could happen if theres something inherently wrong with the measures taken that would forced you to work at the limit of the available turns. Since this boat is sailed in the Mediterranean we must have a good light wind setup and be able to intervene on the shape of the sail as the wind increases. I will analyze your calculations carefully. Using Colligo's stretch calculator it looks like I should go with 5/16 and 1/4" Dyneema respectively. iPhone. Sounds interesting regardless. 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. For the moment I wanted to see the mast without no tension in the D2s.
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