Found inside – Page 94REEFING. Very few people speak well of single-line jiffy reefing systems. You're supposed to be able to do everything from the ... Slab reefing where you attach the cringle to the ram's horn at the mast is also an excellent system. This can be the simplest system to put a reef in, but can be one of the more problematic to get to work smoothly because it may have a lot of friction.
With the many options for sourcing and processing lumber, which slab is best for your project? 8. 4)When a number of footings are to be provided preferably their depths are kept equal.. Added an electric winch at the helm, low friction rings at the base of the mast (on dynema to pre-existing fittings). Since more and more boats these days are leading the halyards aft, single line reefing has become a very popular method for reefing your mainsail. In general, this system is configured in two ways:

(makes handling much easier). Single Line Reefing. The process of reefing involves easing the main halyard to the desired point and then taking up on the single reef line. (Other colours not avaliable) The. Found inside – Page 231... 90-92, 91 singlehanders, 92, 136; mental strain on, 164-68 sinks, 135, 219, 225 skidproofing, 63 skipper: experience, 20, 224; leadership, 164; licensing, 179-80 slab reefing: single-line, 39; traditional, 38 sleep, 92, 165. The single line reefing system is probably the easiest way to pull a reef in a mainsail and, providing the mainsail halyard and topping lift are led back to the cockpit, there's no need to clamber up to the mast to shorten sail. Re: cockpit reefing - multihull specific. The sail is now reefed. WIth solo sailing in mind, I see Barton produce a SLR kit where you set up one reef one side of the boom and the second reef on the other side and with blocks, organisers and . Found inside – Page 289A further advantage of the deep ballast arms with load bulbs at their tips ( compared to the shallower conventional keel with twice the ... and the fully battened main is fitted with lazy jacks and slab or single - line reefing . Found inside – Page 170Otherwise the best answer is the now - traditional slab - reefing ( jiffyreefing ) system . There are several variations on this theme – reefing lines inside the boom or external ; single - line reefing systems in which the tack and ... DELTA SERIES. If you expect to be reefed for a while, tie the reef clew down to the boom with a sail tie, to take the load should the reef line fail. Everything you said. It doesn't get much simpler than the external system shown . For sail protection, put a small sacrificial patch of sail . The slab is outside buildings which subjected to 1 hr fire resistance and design for 50 years design life. 3.75 m apart. Single Line reefing makes slab reefing simple.

the more I look over that set up above the more I like it. . One person can reef, on almost any point of sail, within one minute without leaving the cockpit. Just lower the sail to a pre-determined mark on the halyard, tension the reefing line and trim the sail - all from the cockpit. The materials to be used are grade C25 concrete and grade 500 reinforcement. Single-line reefing, in which a single line runs to both the tack and the clew, simplifies the reefing process and is the most popular method of slab reefing today. on line. Clearly, this arrangement needs someone at the mast to switch the lines over. You must log in or register to reply here.

After four seasons, (in which she has sailed in salt conditions and been stored outdoors in a yard over winter), I have tracked down why the Selden single line reefing system has become progressively more difficult to operate. Added 6 clutches at the helm for main halyard, spinnaker halyard, topping lift, outhaul and two for reefing (have to change the lines when going from one reef to . (Source: Garber NR, Kirdulis T. Slab-off prisms. You must log in or register to reply here. I chose in-mast reefing for my boat because I also single-hand almost exclusively. If your lines lead back to the cockpit and you have a single-line reefing system, the process is straightforward. Pulls down luff and leech at the same time. Its drawbacks include the increased friction induced in the system through the inclusion of yet more turning blocks. Found inside – Page 133We used slab reefing for the two reef points on both the main and the mizzen. After easing the halyard, we slipped the ... We started out looking at single-line reefing systems, which use one line led back to the cockpit to tighten ... There is only my wife and myself, and my wife doesn't really sail, anyway, so I have to be able to do everything single-handed in all weathers. you want to pull the outboard reef, not just down, but also out. reef and 3 for the second. Found inside – Page 160They are rove through a double - block , on the quarter of the yard , from in out , through the slab - line blocks ... cringle in the sail with a half - hitch , and the end seized back , or with clip - hooks if a single reef - tackle . I have had problems doing this when using single line reefing, so don't much like it for this reason.. but I must admit it was a poor setup and, any feedback on this would be appreciated. -Modern rigs allow you to put in a "half reef . Too much friction. I use a 3/4" stainless triangle on one side of the cringle hole and tie the carbo block on the other side of the sail, and tying it through the hole. Slab reefing lashes down a portion of the mainsail to the boom via one or two rows of reef points, being thin ropes stitched to the sail or cringles being reinforced eyes in the sail by reefing line.

We have slab reefing and have deliberately not had lines led back. Found inside – Page 76You can reef while you are afloat if your boat has slab or boom roller reefing, but it is much easier to reef ashore before ... A single-handed dinghy with a sleeved sail should be reefed before sailing. ... for lacing a reefing line. The word Monolithic means "all in a single pour" so in construction where Monolithic Slab is used the foundation is made in one single pour that is made up of a layer of a concrete slab with thicker area under the load-bearing walls and all the edges of the perimeter to replace the footer.. Construction of Monolithic Slab is much faster and the labor costs are low as in this Slab the . I'd endorse what Robin has said but for different reasons. Reefing consists of releasing the main sheet, dropping the main halyard a sufficient amount, tightening the two reefing lines, tightening the halyard, and then sheeting in the main. • Less expensive. In slab reefing, the mainsail is lowered down onto the boom and then secured at it's new smaller size. Single Line Reef. How To: Smooth Reefing for Smooth Sailing - 48° North Isomat single line reefing - Gear Anarchy - Sailing ... For a better experience, please enable JavaScript in your browser before proceeding. The knowledge from having one!" Trouble is I'd then have to put on the oilies, then the harness and the slippers would have to go too! A large range of marine hardware for yachts up to 15m (50 foot) is . How to Reef a Sail - Where You Make It no doubt more modern systems avoid this issue but it left a bad taste. As you drop the sail, the lines guide the main down to alternate sides of the boom. Siezed sheaves in Selden boom single line reefing kit on ... If you sail single handed without an autopilot then even raising the mainsail at the mast is a challenge as it is hard to keep the boat aiming into the wind. Ease the main topping lift. In strong weather the reefing line tended to slip while you were reefing and you found you had more not less sail out! For a three part (three line segments) outhaul, you'll need: 4′ x 1/4″ New England Ropes Sta Set or equivalent. The reasons I went single line on the Nimble were #1 hadn't done it before, didn't know any better and #2 single line did allow me to run all the lines . Seaworthy Offshore Sailboat: A Guide to Essential Features, ... Joined Slab or Single Live Edge Slab? - Ohio Wood Connection Cruising World - Jan – Oct 2000 - Page 82 Mainsail furling systems: an expert guide - Yachting Monthly I agree with everything said about the advantages of slab reefing. Here are a few pictures that show the OEM single-line reefing. Found insideDouble-handed dinghies Dinghies with shrouds can be fitted with a sophisticated 'slab reefing' system, which works by ... On more sophisticated systems, a single control line pulls luff and leech lines down together, with the boom held ... Found inside – Page 266But I will still enter the debate on in-mast and in-boom mainsail furling as against slab reefing. The keep-it-simple argument seems to appeal here to a lot of bluewater sailors. Slab reefing is simple. When it fails it is more likely ... 1.1(b) shows two center strips of a rectangular plate with spans l a and l b. Halyards and reefing lines that are led aft should ideally pass through the smallest angles possible - the bigger the angle though which a line is deflected, the greater the friction. With single line reefing it isn't possible to unreeve the line and change how it is led while sailing, another disadvantage of the system. For all the same arguments including geeting older and sails getting bigger. The only proviso is that you should have a small winch in a position to be able to manage the control lines. Instead of a reef line for the tack and the clew, there is one line for both. Single Line Reefing Double Line Reefing Slab Reefing.

Single Line or Two Line Jiffy Reefing Reefing is done on some yachts entirely at the mast, while on other boats, the reefing lines are rigged to the cockpit. This … Continue reading "Dutchman System"

The sailmaker would cut the mainsail with preformed stainless steel rings in the luff and leech at fixed points up the sail. I didn't have the Dutchman installed in the new sail as I'm not a real fan of the system. 3. The last issue involved with single reef line setups is the length of line needed to rig the reefing system. 13. A forum community dedicated to Sailing enthusiasts. . At mid-span the bottom of the slab is above the top of the girder by the fillet amount (¾ "). cleated at time of reefing. The Fora platform includes forum software by XenForo, http://www.guildmark.com/crumpet/IsomatDoubleReefingBig.gif, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Methods for reefing a mainsail differ for in-mast, in-boom, slab reefing or jiffy reefing rigs. As others have said KISS appplies here too..... Having gone from normal slab reefing to slab with full length battens, and then to behind mast rolling, I much prefer the later especially when single handed.

Install the block on the boom eye strap, the fairlead cleat on the side of the boom, and reave the line as shown in the picture below. Siezed sheaves in Selden boom single line reefing kit on 36i. Cut that line using a circular saw with a good blade. The latest generation of this well-made furling system strike a balance between total cost, performance, and versatility. Found inside – Page 161Normal slab-reefing works, but for light open boats a single-line system can be easier and quicker, especially if single-or short-handed. In a larger boat two lines may work better, as the clew and tack downhauls can be controlled ... If the slab is too thick, there are other larger circular saws available, or you can try and manage with a hand . Could I run a line from the reefing cringle on the luff, through the boom and secure it via a cam cleat (or horn cleat if recommended) at the end of the boom. We beleive that with having to go up to reef we keep the skill and in the long term will benefit us. Here are a few pictures that show the OEM single-line reefing. The system makes reefing your mainsail a quick and easy operation. How is the turning block attached to the main, the routing I now see is just in and out of the gooseneck and down to the blocks on the deck then back to the clutches on the coach house. (3)Haul the the appropriate forward reefing line and cleat it, then engage the aft line and cleat it. Many of the same arguments were around when furling headsails showed up first and on a relative scale they are at least as inefficient as in-mast mains. You Sir are a scholar and a gentleman for providing me with all this information in such a quick fashion, it appreciate it beyond words.

I prefer continuous elastic with hooks Here is the view on the other side showing the bitter end. Found insideThe modern jiffy version of the wellproven slab reefing is a quicker and easier way to reduce sail anyway. With single line reefing sail can be reduced from the safety of the cockpit while handling only the halliard and reefing line. The slab has to carry a distributed permanent action of 1.0 kN/m2 (excluding slab self-weight) and a variable action of 3.0 kN/m2. However, I've never had slab-reefing led back to the cockpit and I've never had in-mast furling, either. To start with, have a crew on deck to watch the sail as it furls to spot any issues. Select your furling system based on the type of sail to be furled: Jib Reefing Systems Are suitable for jibs, genoas and yankees with a luff rope and flat sail shape. I do have one question in regard to the turning block on the main. The standard single line reefing with the tack line going through a dogbone in the sail also allows you to reef using a tack hook if you are reefing for a longer period of time. Tighten and make fast the reefing tack line, or put the tack cringle onto the gooseneck hook, ring or shackle. FW, I don't think what you describe will be practical. The reefing lines are the white with red stripes in my pictures. For the system to work perfectly from the cockpit, the lines must be carefully laid to reduce all friction from the system. To reef: (1) Engage topping lift. Single line reefing essentially means that the outboard and inboard reef cringles use one line to tuck (or haul down) both ends of the sail. A friend of mine works in a sail loft - they also rig & maintain all sort of furling systems. It (aft line) is hand fed thru the appropriate cringle and. When well set up, single-line reefing systems, which have a low-friction pulley system within the boom can be extremely neat. JavaScript is disabled. For short handed sailing, greater control of every aspect of main handling results, especially when reefing with in-mast, in-boom systems or a traditional slab. A reefing system that relies upon roller furling is, one could argue, simpler and easier to do when shorthanded. When you need to reef in worsening conditions trying to move the outhaul connection will prove very difficult, if not dangerous... And its not guaranteed that the boom end will be easily reachable crom the cockpit. Rich, I can't thank you enough for the photos, it all make sense to me now and I will be moving to install the same system that you have devised at the leech on both reef points. With clear, helpful colour photographs and diagrams throughout, this is the essential book for anyone planning for or dreaming about sailing further afield. Pull the reefing line ‚ until the plate block is stopped by the outer boom end fitting.

FIRST: Read below for a few thoughts on reefing procedure When reefing, conditions are […] Read More Conventional Mainsail Reefing Denise, Bristol PA, Hunter 34 @ Handy's Wharf formerly Green point Landing Worton Maryland.
The booms can be fitted for traditional slab reefing or Single Line Reef, or be used for furling masts. .

Imagine a yacht with a really high reef point, say for a third reef, that is located 20 feet up the luff. All done from the cockpit. Jiffy Slab (Single Line) Reefing • "Jiffy Slab" or "single Line" Reefing brings the entire sail down in one slab. I have two spare sheaves at each end of my boom. Found inside – Page 28A. A simple slab reef with fixed points . Notice that the pad eye on the port side is in ... B. An adjustable slab reef so that one set of reef lines can be used for more than one reef cringle or can be adapted to different mainsails . Rivets and machine screws. . 1989;8(4):139‐142.) Many modern yachts use a lazyjack system which creates a pocket for the mainsail to reef down into. The illustration shows a single-line system. Put a new mark on the reefing line A 9. Found inside – Page 81i!r-_¢;)ti>V"l|f'1\'Pt11?fi:§w4\':0veL-'wr< Sails & Rigging Sails & Rigging Sails & Rigging Standard ... Auto Reef, developed by Sparcraft/lsomat, and Selden/Sailsystems booms are single-line reefing systems, each of which employs a ... consisting of a bottom slab, two wall elements and a top slab. The sail slides up and down on the lines like a roman shade. Lower composite deck-slab weight than 3WxH-36 for the specified concrete thickness 8 inch on center low flute spacing to allow for bearing wall studs to be at 16 inches on center Non-composite deck 7⁄ 8 inch depth, 32 inch coverage 2 foot to 7 foot Span Range No Acustadek® Options Good for short span conditions

Designer - Individual(s) designated by the Structural Engineer to use this manual to design and detail culverts. Found inside – Page 29678 | Single Vang , a 84 Chain Topsail Sheet , to Reeve a 74 Slab Lines , Fore or Main , to Clew Garnet , Fore or Main , a . ... Fore or Main to Reeve 72 LongBunt Whip 77 Tack Tricking Line , the 81 Reef Tackle , to Reeve a . I'm sailing a Hunter 30 (1989). Single line reefing: DIY system I have used this single line reefing system for the past 20 years, on two different boats, without problems of excessive friction or clashing balance blocks. Today I want to talk about the difference between the two reef systems and how they should be set up. We also show how to set a reef using the single-line system. 2. Found inside – Page 65obviate two sites subject to line chafe . Sometimes , as on our beat to the Amazon from Barbados , or on our eight - day passage directly from the Bahamas to the Virgin Islands , a reef stays in for days .

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