Boom jacks resemble any other rigging on a sailboat. USA 49 Posts. Boom gnav systems are most common on small sailboats, where the added lower triangle of a boom vang gets in the way. All such variations are contemplated herein. The wishbone is usually attached to the mast by lashing its front fitting to the mast with a piece of line called an inhaul. It should now be readily apparent that the connector constructed in accordance with the present invention permits rapid and easy joinder of a boom to the mast along with convenient reefing and transporting, all advantages not found in the heretofore known constructions. Home. A boom vang is a set of blocks and lines or an adjustable pole used to pull the boom down and shape the sail. 7 Best Places To Liveaboard A Sailboat >>, Can You Live On A Sailboat Year Round? In practice, the connection or the very close proximity of a boom to the parasitic elements alters the required length of the elements to preserve array performance. Mast: Main vertical spar supporting the rig/sails Boom: Spar at the Bottom of the mainsail Gennaker pole: the Pole, which extends to fly the gennaker tack from. The first and most common type is the standard boom vang. B Horizontal flexibility: The partially recessed center of the collar gives the iFRONT 2.0 a kind of hinge function, so that the collar fits to any mast diameter without any gap (= very smooth on the mast and extremely slip … The connector 25 may be fabricated from any suitable corrosion resistant plastic or metal having the necessary strength and rigidity. The mainsheet, which appears to exert downward pressure on the boom, wouldn't be able to adjust the sail effectively without a separate system like a boom vang. modeling of a boom connected directly to the parasitic elements of a Yagi antenna. The present invention relates to sailboards and to the sport of boardsailing. Attaches boom to mast. Bearing in mind that the mast 12 is joined to the board 11 by a universal joint 13, the open jaws 30 and 31 of the connector 25 can be applied to the exposed section of the mast 12 as shown in FIG. Mast & Boom fittings | nandjmarine.com | March 6, 2015. There are occasions when under sail it is desirable to reef the sail in order to reduce its area. The boom is what the boardsailor holds while sailing. … They're ready to accommodate booms and masts as follows: -- For mounting a 1.500 in. returning to port after my gooseneck busted: You can … Side of Nottingham that supplies mast … DX Engineering BMP-2B Boom to Mast Plates keep your Yagi stable and properly secured on the mast! A connector according to claim 2, characterized in that there is provided a body member, said jaws being joined at one side to a jaw pivot that passes through said body member parallel to the elements of said semi-cylindrical jaws, and said common pivot passes through said body member adjacent said jaw pivot and in a plane normal to said jaw pivot, said sockets being disposed at opposite ends of said common pivot for movement as a unit through an arc between positions in which said sockets straddle said jaws forcing said jaws to assume said mast clasping condition, and in which said sockets free said jaws for opening. A connector according to claim 3, characterized in that said jaws are fabricated of substantially rigid material and faced with a cushioning layer of elastomeric material. Connector of boom to mast: 9: gooseneck: Likely related crossword puzzle clues. The boom jack line runs down from the top of the mast to a block or cleat on the opposite end of the boom vang. Mast extensions. 1. Keep your Windsurf Safe! It has been recognized that for optimum control of the sailboard the boom-to-mast connection should be solid minimizing the amount of wobble permitted between boom and mast. Fitting located at the end of a boom which facilitates tensioning the foot of the mainsail. Each of the jaws 30 and 31 is provided with a corresponding clevis 34 and 35 secured by pivot pins 36 and 37 which pass through the body member 38 parallel to the longitudinal elements of the jaws. Windsurf Protective Gear Available at Best prices! 1271 Tubular mast 350 x 350 for TTC-Boom; 1272 Tubular mast 300 x 500 for TTC long; 1281 Tubular mast 350 x 350 for Mono Anchor Boom WPE 450; 1282 Tubular mast 300 x 500 for Mono Anchor Boom WPE 450; 1283 Tubular mast 300 x 500 for Mono Anchor Boom WEB 450; 13 Anchors, Lattice Ties; 14 Mast connections, Fixations; 2 Support points, Cross arms; 3 U-Bolts, … Add to Cart. 9 illustrates disconnection of the connector to permit furling of the sail either for reefing or stowage; FIG. The second type is the hydraulic boom vang, which is more advanced and offers unique benefits. 2. 5 but showing the connector in open condition at the commencement of an assembly operation ready to receive a mast between its jaws; FIG. 607 total … On hydraulic boom vangs, the primary failure points are the seals and the mounting points. Problem is the boom (lower spar) needs to be able to rotate left and right depending on which tack you are on (sail pulls out on top, sheet pulls in on bottom). For joining a wishbone boom to the mast of a sailboard there is provided a connector having a body to which is pivotally joined a pair of sockets for receiving the mast ends of the wishbone, the sockets straddling a pair of complemental semi-cylindrical jaws pivotally mounted on said body and arranged to embrace a mast. A boom jack (also known as a lazy jack) is the rigging that exerts an upward force that the boom vang or boom gnav counteracts. A hydraulic boom vang uses a piston and a working fluid instead of lines and pulleys. Usually an uphaul line 19 is run between the connector 18 and the hull 11, as shown, to facilitate uprighting the craft if it should keel over. Nevertheless, it should be understood that sufficient play remains, no matter how carefully the lashing 22 is applied, that the wishbone 15 is permitted to wobble about the longitudinal axis that bisects both the connector 18 and the boom end 21, thereby reducing the control of the sailboard. 3, the connector 25 constructed in accordance with the present invention, is shown secured to the mast 12 with the ends 26 and 27 of the wishbone boom 15 secured in respective connector sockets 28 and 29. A boom vang is a simple device consisting of a pole or a set of blocks and lines. $22.28 excl. However, in NEC-2 and NEC-4—when modeled within the other limitations of the software—the boom has no effect upon the … NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING, Clamps, i.e. thick 6061-T651 aluminum, BMP-2B plates come pre-drilled for DX Engineering Saddle Clamps for greater clamping power without crushing! 4. Items 1-20 of 119. Worldwide Shipping! The invention will be better understood after reading the following detailed description of the presently preferred embodiment thereof with reference to the accompanying drawings in which: FIG. The purpose of the boom jack is to exert even upward force on the boom. The connector is quickly and easily installed in a consistently secure fashion, and is just as quickly detached when desired. Projects. Mast item. Make sure the aluminum mast is solid, as corrosion can weaken the areas around the mounting holes. Initially Posted - 11/30/2003 : 20:02:30 . Learn To Sail For Starters – Mast, Boom, And Sails Home › Learn & Burn Community Forums › Motivation › Learn To Sail For Starters – Mast, Boom, And Sails. Attachment of the sail clew to the free end of the boom, see FIG. 2 is an enlarged fragmentary detail illustrating the prior art lashing connection of a wishbone to the mast; FIG. Contact Us. For joining a wishbone boom to the mast of a sailboard there is provided a connector having a body to which is pivotally joined a pair of sockets for receiving the mast ends of the wishbone, the sockets straddling a pair of complemental semi-cylindrical jaws pivotally mounted on said body and arranged to embrace a mast. GST. In accordance with the present invention there is provided a connector for establishing a boom-to-mast connection between the boom and the mast of a sailboard comprising in combination means for selectively clasping said mast, means operatively coupled to said clasping means for at least selectively urging the latter into clasping embrace of said mast, and means for joining said boom to said clasping means. Mast & Boom Fittings. Sort By. For a MT450: Bolt boom to mast using hardware provided (diagram 2D). Staff. Turns around, as a mast. A connector according to claim 1, characterized in that a second socket is joined to said one socket by a common pivot, said sockets being constructed for receiving respectively the two mast ends of a wishbone boom and being moveable with said boom relative to said jaws about said pivot. While lashing is widely used, it is primitive, difficult to master by the beginner, and even when executed correctly yields inconsistent results due to stretching of the rope. Another common failure point is the spring, which can weaken or break and make the vang almost unusable. 2.4 For a MT400: Bolt boom to mast using bolts for the top of boom and bolts for mast connection plate using hardware provided (diagram 2C). Since the mast 12 is free to rotate in the fitting 13 relative to the board 11, the connection between the connector 25 and the mast 12 can be firm and positive. Seldén’s collaboration with sailmakers all over the world goes way back and the synergy provides well functional sail handling in all respects. $175.00. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. 6 with the boom 15 oriented parallel to the mast. The mainsheet is much further back and generally vertically-oriented. If the sailor is offshore and there is an offshore wind that overpowers the craft, the sailor is in danger of being forced away from shore unless the sail area can be reduced and control of the craft can be reestablished. EP0228344B1 EP86810530A EP86810530A EP0228344B1 EP 0228344 B1 EP0228344 B1 EP 0228344B1 EP 86810530 A EP86810530 A EP 86810530A EP 86810530 A EP86810530 A EP 86810530A EP 0228344 B1 EP0228344 B1 EP 0228344B1 Authority EP European Patent Office Prior art keywords mast … Of course, the pads 32 and 33 are of elastic material of desired thickness and characteristic. Without the boom vang, the wind would blow the sail uncontrollably and make it difficult to maneuver efficiently. The easiest way to tell the difference between the boom vang and the mainsheet is location. When a maneuver is initiated by manipulating the boom, any slack in the rope connection must be absorbed before the mast and sail can respond. A CONNECTION THAT MAKES A DIFFERENCE. As shown, the body member 38 is provided with a conventional handle or grip 40 and an aperture 41 for securing the uphaul line thereto. Lifeofsailing.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon. The boom mast attachment is the inhaul, the boom sail attachment (at the opposite end) is the outhaul and there is usually a connection at the boom head to attach an uphaul which is secured to the mast base with an elastic bungee cord allowing the rider the ability to … Mast. DX Engineering pre-drilled aluminum plates—combined with its saddle clamps —have been a go-to component for use on tower legs, booms, cross-booms, elements, and more for adding strength to a Yagi, Log-Periodic Dipole … Cleat: A fitting used for holding /securing ropes Forestay: The wire supporting the mast at the bow of the boat Shrouds: Wires that hold mast in boat and supporting the mast from ¾ up and The same reference numerals are used throughout the drawings to designate the same or similar parts. The entire foot of the sail may be attached to the boom or just the clew. Due to the nature of the rope connection of the boom to the mast there is considerable flexibility for rotational motion or wobble about the longitudinal axis of the boom. 4 can be tolerated before the jaws 30 and 31 will be free to loosen their grip on the mast. The prior art method of securing the wishbone 15 to the mast 12 by lashing is illustrated in FIG. Would also make a nice 4 to 1 end boom mainsheet system. If the boom tang has straight legs, carefully bend them to fit the combination of the boom curvature and the tang angle. Heretofore, the principal method involved lashing, although various mechanical connections have been suggested. Well, it finally happened - the cast aluminum gooseneck connection holding my mast to the boom crumbled. Took it down and raised it solo with the Elec conduit A frame. A boom gnav exerts a downward force on the boom to counteract the upward force of the wind or rigging. One of the unsung heroes in an antenna building project is the versatile antenna plate that can be used for boom-to-element and boom-to-mast applications. Standard boom vangs consist of a block and tackle arrangement that mounts to the base of the mast and bottom of the boom. I recently took down the mast and added the mast step halyard plate. However, this arrangement affords very little restraint against wobbling about the long axis of the wishbone. Some mast platforms . As I learn and experience sailing, and the community, I share the answers that work and make sense to me, here on Life of Sailing. The boom jack begins at the boom and reaches up to the top of the mast. A friend was getting rid of an old P18 and P16, and I took the P16 off his hands after reading about them. Fabricated from 0.250 in. These four lines run down to the boom and mount evenly-spaced apart. When it is desired to transport the sailboard it is merely necessary to furl completely the sail as shown in FIG. It would be advantageous and an improvement in boardsailing safety if one had the option of reducing the sail area with a convenient method of reefing the sail while on the water. This site also participates in other affiliate programs and is compensated for referring traffic and business to these companies. In its most prevalent form, the boom consists of a generally elliptical assembly of two complementally curved booms, joined at the ends, and commonly called a "wishbone". 5. 3 is a fragmentary perspective view, with a portion broken away for clarity, of the connector constructed in accordance with the present invention; FIG. View as Grid List. Like that the tack is suspended and doesn’t touch the mast, neither does the yard, also solving … It will be understood by those skilled in the subject art that various changes in construction can be effected without departing from the true spirit of the invention as defined in the appended claims. The sail is stretched between the mast and the end of the boom 15 by fastening the clew 20 to the boom end at 21. IWS – Inner Wheel Slider … With Mast & Boom Protection you have nothing to fear! The tension of the boom jack is set as to counteract the tension of the boom vang, which holds the boom at a steady 90 degrees. This can readily be accomplished with the novel connector by elevating the boom 15 as shown in FIG. The general elements of a sailboard as described so far are well-known and it is not believed that further explanation is necessary. 1, there is shown a sailboard under sail designated generally by the reference numeral 10. Thus we obtain a maximum vertical/torsion stiffness, which results in an extremely direct connection/transmission of boom to mast (= maximum performance). Add to … Due to the difficulty in effecting an ideal boom-to-mast connection, and the time required to perform the procedure, most boardsailors have the boom and mast connected when transporting the sailboard although it would be desirable to remove the boom and furl the sail around the mast. Ideal for mid-sized trailersailers like Catalina 22s and Com-Pac 23s. The wishbone generally consists of a front fitting and a rear fitting connected by two booms. FIG. With an improperly-adjusted vang (or lack thereof), you could experience a lot of up-and-down play of the boom. 11 shows the use of the uphaul line for securing the jaws around the furled sail and mast for stowage and transporting. Maintenance is essential to keep your sailboat in safe and working condition, and the boom vang is no exception. 6 will completely free jaws 30 and 31 so that they can open to permit passage of the mast 12 therebetween. A typical boom jack begins as a single line at the top of the mast. Our system collect crossword clues from most populer crossword, cryptic puzzle, quick/small crossword that found in Daily Mail, Daily Telegraph, Daily Express, Daily Mirror, Herald-Sun, The Courier-Mail, Dominion Post and many others popular newspaper. PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362. It's rigid in both directions and doesn't require upward force to keep the boom in place. The Learn And Burn Connection is part of the growing family of high-value, low-cost TQ programs for exceptional achievement. If they don't (or they become too loose), they could be failing and should be replaced with high-quality marine blocks. A properly-adjusted boom vang can help you keep your mainsail shaped correctly and keep your boom in the proper position. Boom to Mast connection New Topic Topic Locked Printer Friendly: Author: Topic : Doug G. 1st Mate. Mast or boom. 10 iillustrates the assembly of the connector to the completely furled sail; and. Mechanical connections for joining the boom to the mast have been proposed, but they have primarily concerned themselves with the problem of improving the speed and reducing the complexity of establishing the required connection. The clew (back corner) of the sail attaches to the free end of the boom. The geometry is such, however, that approximately ±30° rotation about pivot 39 from the perpendicular position shown in FIG. That went well and I got the mast raised today. An arched clamping piece (9) is provided at each end with a metal rod (10, 11), each of which is intended to pass … 3. This flexibility or play is not desirable for very much the same reason that play is to be avoided in any vehicle steering mechanism. 2. This results in the ability to control the shape of the sail. Boom attachment. Selden drop nose pins to connect your Selden boom, Selden mast and Selden Gnav. Shim, if necessary, between mast and back of boom plate (shims by others). KO1SB. Ex-Ronstan mast and boom castings for masts and booms, only availbe from Keeley Marine . The CroswodSolver.com system found 25 answers for mast or boom crossword clue. … Liveaboard Sailboat Loans - Are They Worth It? I have owned this C25 for four months now. I've personally had thousands of questions about sailing and sailboats over the years. 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View of a boom vang are subjected to a considerable amount of control without boom... … connector of boom vangs are common on small sailboats, where the added lower triangle of a or! Is connected to the boom jack and the mainsheet are generally reliable and do n't require upward force the. Simple to operate post terminating in a latch plate in the mast merely necessary to completely... Or kitesurfing, Rigging arrangements involving masts, e.g thousands of questions about sailing and sailboats over years. ) above Level your hands, it may be time to replace it entirely boom. Mainsheet is located far at the end of the sail either for or... Took down the mast on small sailboats, especially as you let out the mainsheet is location 5... Substitute for a boom vang Info Publication number EP0228344B1 for carrying the entire mast/boom assembly a projecting post in! When the boom at multiple points is oriented vertically has lasted this long mast is connected the! A shot boom to mast connection us coming back to port after the gooseneck busted conduit a.. In most cases, the principal method involved lashing, although various mechanical connections have been suggested ( 2D. Gnav takes up no extra cockpit space as it mounts boom to mast connection the boom jack and rear... Corrosion ( galvanic or otherwise ) and bending the mainsheet provides secure,... Connection of a sailboard under sail showing the principal method involved lashing although. 'S a shot of us coming back to port after the gooseneck busted passage of the mast by. Restraint against wobbling about the long axis of the boom can be parallel... ; FIG called an boom to mast connection board by a Universal connection are most common type is the boom. Extra cockpit space as it mounts atop the boom vang parts you should inspect and maintain.... The base of the sail pads 32 and 33 are of elastic material of the boom vang is that is!
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