standing rigging size calculator

Creep will mean your rig needs re-tensioning over time. This is because upwind mast is fully loaded at just 15-16 knots after which you need to reduce sail. 20% is 576kg so if we size at the 10% we get 5760kg (we can simplify the calculation to looking for a Dyneema line that is at least twice the breaking limit of the stainless it replaces). Thus your list is not suitable and not providing the correct strength for design allowable limits of mast alloy grades. Looking at the mast from the side you could see a beautiful shape without irregularities that gently curved back. a toggle fork at the bottom end. As mentioned, runners can be used in different ways. If you are replacing your turnbuckles, make sure the existing turnbuckles are adjusted to their normal set position for sailing before taking your measurements. Select your wire construction KOS 1x19 - this is the standard wire for standing rigging on Cruising Yachts Petersen Compact Strand - for higher strength performance KOS flexible 7x19 - for applications where the wire will be required to turn around sheaves. How to Measure Standing Rigging - Sailing Services So these are the sites Ive found most useful in working sizes for our boat. 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. Find a flat surface large enough that you can fully stretch your rigging out for measurement. That has two ways of calculating the size. Most lines are pre-stretched. RIGGINGS AND MASTS CALCULATIONS ONLINE RIGGINGS AND MASTS FREE DATABASE: Just in 10 minutes! I hear about these guys on every forum everywhere. 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). I have a 1988 Catalina 22'. The second is a calculation based on the current rigging size. But I have seen many badly adjusted masts and not by just a little. Effect of angle on capacity. 1/2beam is half of the shroud base width Choose the profiles, suppliers and materials from the database 3. Replacing Your Standing Rigging - RIGWORKS INC. Simple. Lets consider the mast of a Class40, with two orders of swept back spreaders and its standing rigging. The forestay turnbuckle in this case, and like on many other boats, was inside the furling drum. Make sure your turnbuckle is centered between the studs for accurate measurement. Tuning is required at each spreader level due to the wire terminating at each spreader tip. 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. We also attached spinnaker halyards one to the left and one to starboard to an eyebolt. This curvature lets you bring the fat of the mainsail forward flattening the sail. Search by manufacturer's part # or brand. 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. Why not schedule annual service as you would with a car? The pre-bend, at a given a setting of the V1s, is controlled by the tension of the D1s and D2s. They sell 100m drums and 50m hanks which is handy (they can also make custom lengths with a variety of splices etc). The first is the RM30 heeling test to calculate rig loads. There isnt even a topping lift to support the boom when reefing. When buying new running rigging (i.e. The next two methods are basically the same but use slightly differnt load levels for the shrouds. For a rod of the size we were adjusting we needed a large and very expensive tension measurement tool. First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. I am not aware of any such cases among Class40s. To reduce the bend we had to reduce tension of the V1s but also monitor the tension of the D1s. It is your responsibility to assure that the slings you use are appropriate for your application. Before tightening the forestay, however, I wanted to loosen the the V1s a little so as not to induce further compression in the mast. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. The spring-loaded ones suitable for adjusting the shrouds of a Mini 650 are useless. The flogging of a loose shroud can actually be harder on wire than steady pressure. says the wire was 1/4". Their sizing post is Sizing for Creep. 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 example, assume a 2,000 pound load is to be supported by 2 legs of a sling. 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. 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. 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. For example, many chainplates are too thin to grip clevis pins correctly. Sizes .172 to .375 and 4.4mm to 9.5mm. It provides some tables of the most common suppliers of slings and shackles, but the user can add its own tables. Since it was not me who had mounted the mast, I could not be sure that the turnbuckles had been inserted correctly, i.e. It is important to use a tape measure under tension and that does not stretch. All standing rigging is manufactured right here in our rigging shop -- the way it's been since 1984. 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. If your standing rigging does not match our diagram, or has been modified, then the quoted price is not applicable to your boat.

Pop Up Birthday Cards With Confetti, Accident On I5 Today Tumwater, Mobile Homes For Sale In Helena Montana By Owner, Articles S