Whisker Pole<<수정>>

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01) What is a Whisker Pole 02) Advantages of Using a Whisker Pole 03) Types of Whisker Poles 04) Choosing a Whisker Pole 05) End Fittings 06) Attachment to the Mast 07) Storage 08) Maintenance 09) Do's and Don'ts 10) Tips on Usage 11) The Weight Issue 12) Carbon Fiber Whisker Pole
1. What is a Whisker Pole? Whisker Poles are used to "wing-out" the jib when sailing downwind. They extend between the mast and jib sheet at the clew to hold the jib out on the opposite side of the main in clean air, producing a greater degree of control and efficiency than you could possibly achieve without a whisker pole. Sailors who have attempted downwind sailing without a whisker pole can appreciate the value of being able to stabilize the jib, enabling the sail to work more efficiently. 2. Advantages of Using a Whisker Pole. A whisker pole allows you to control the shape and position of the jib on a downwind run, exposing it to air that is undisturbed by the main sail, thus producing a very noticeable increase in efficiency and boat speed. Sailing wing-on-wing is much easier than handling a spinnaker and takes less people to handle equipment. 3. Types of Whisker Poles. The most common styles of telescoping poles are: Twist-lock telescoping and the Line-controlled telescoping. Twist-lock poles are made for boats from 12 to 25 feet and are relatively lightweight. They use an internal off-set cam lock to control their length. All you do is twist the inner tube to unlock, pull the inner tube out to the desired length and then twist again to lock. They are infinitely adjustable from their minimum to their maximum lengths so they can be marked and set exactly to the sails requirement. Line-controlled telescoping poles are infinitely adjustable and made for boats from 25 to 55 feet. They are a bit heavier because they must take the higher compression loads resulting from larger sails. Line-controlled whisker poles are adjusted to length via a fixed length control line that runs internally and externally for the length of the pole. By un-cleating this line, you simply pull the line and the pole telescopes. To set the length you then cleat off the line when you’ve reached the desired length. 4. Choosing a Whisker Pole. Whisker poles are not to be confused with spinnaker poles that are of fixed length and sized to the boat's "J" dimension. The basic length of a whisker pole should be 100% of the foot length of the sail it is to be used on. For boats carrying a variety of head sail sizes or incorporate roller reefing for the jib, an adjustable whisker pole is ideal. Whisker poles are designed to operate under higher compressive forces than spinnaker poles. Since tube diameter and wall thickness are a major function of strength, whisker poles must be sized accordingly. The size requirement of the whisker pole depends on boat length, type of sail used and general wind conditions. Additional variables include displacement and bow sprits that extend the basic fore-triangle. Forespar has developed a size recommendation chart based on over 30 years of empirical data and it is strongly suggested these guidelines be followed. Do not short-change yourself by trying to undersize a pole that will not hold up to the loads. Click here to see Whisker Pole Size Recommendation chart. 5. End Fittings. Whisker poles are available with a variety of end fitting combinations. These various end fitting styles accommodate different pole sizes, mast attachment fittings and storage options. The outboard end fitting must be able to attach and detach quickly from the jib sheet as well as handle the compression loads. Except on very small boats using spike style end fittings, it is also important that the jib sheet be allowed to run freely thru the end fitting. The basic inboard end fitting is a latch. Although they are available in various styles, they are all designed to quickly attach to a ring on the mast. They must also be able to withstand compression loads in a wide range of angles without binding up on the mast fitting. The pole must be able to be set to port or starboard and must be allowed to move fore and aft as well as up and down without binding. All of this movement is under considerable compression loading. To allow for this, the inboard end must be matched to a properly sized mast fitting. Be it either a fixed eye or a mast car, this connection is every bit as critical as your main boom gooseneck fitting. 6. Attachment to the Mast. Mast attachment is critical to insure that the whisker pole can move in the necessary direction without binding under the compression loads. Mast fittings are available in two basic styles: fixed eye or sliding car. Since each style of end fitting may have a specific mast fitting requirement, attention to detail is very important. Fixed Eye mast fittings are typically used on boats under 25". For these applications, Mauri Pro Sailing provides mast pad eyes in two basic sizes. The specific details of these requirements are noted along with other information for each model of whisker pole listed. The important thing to know is to match the pad eye to the pole end fitting. All fixed eye pads should be installed on the forward center face of the mast at a height that allows the pole to fly level. You must determine the elevation of your headsail's clew and mount the mast eye at that height on the mast. If you have more than one headsail you may need two mast eyes, one high and one low, to keep the whisker pole level for each headsail. Sliding Car mast fittings are available in three styles and are designed for larger boats (over 25' ) that require a stronger attachment while allowing the whisker pole to be positioned level to the clew. This attachment method is also much stronger than a fixed eye as the track spreads the load over a greater area. The car style is dictated by the style of end fitting on the pole and whether or not you are going to store the pole up the mast. The basic mast car is a ring car. These cars allow simple attachment of all latch style ends. They do not allow for vertical pole storage because they do not let the pole hang vertically without binding. The rings simply do not stick out far enough and if they were any larger in diameter they would be weaker and allow the end fitting to bind on the ring during use and possibly fracture. It is important to remember that a whisker pole is a tremendous lever arm that can break an end fitting with little apparent force on the pole.   The heavy duty mast car was developed by Forespar to eliminate the possibility of binding and allow poles to hang vertically up the mast for storage. This car has an articulating flange to accept the end fitting and allow the pole to move from side to side freely without the possibly of binding. It also sticks out far enough to accommodate the vertical storage of a 4-1/2" diameter pole. Most cars require an uphaul/downhaul control system (also known as a "heel lift" or "pole lift") on the mast. This is a simple height control system made up of cheek blocks and line that you pull to set the car's height on the track. This is required since the whisker pole may be out of reach when flown. The Toggle style sliding car is designed for even larger poles and offshore sailing conditions on boats 35 feet and over. This ultimate in sliding car design allows the pole to twist without binding as well as providing for the necessary vertical and horizontal movement. Allowing a whisker pole to twist helps eliminate much of the chafing which can occur on long downwind legs during trade-wind sailing. This style of pole also allows for vertical storage and has proven very reliable over the past 30 years. Note: All Forespar mast cars are made to fit the standard 1-1/4" "T" track (with the exception of the larger AT-150-S car) and feature replaceable ultra high molecular weight polyethylene (UHMW) inserts that allow for minimum friction and no metal to metal contact with the track. 7. Storage Whisker pole storage should be considered before purchasing a pole and related fittings since space on board any boat is at a premium. Forespar offers a wide range of fittings to provide you with various options for storing your whisker pole. All twist-lock poles should be stored out of the weather as they have very close tolerances and if allowed to salt up, will not work for long. Twist lock poles, therefore, should be stored below in the cabin or in a cockpit lazarette. Fixed length poles, generally too long to go below, can be mounted on deck in deck chocks or vertically up the mast with the proper fittings. Line-controlled poles, depending on size, can go below, on deck or up the mast. Any pole left on deck in the weather and subject to spray has the potential to freeze up due to salt build-up. Keep this in mind when deciding on a pole. If you have a medium size boat and only use the pole occasionally, it is advisable to store the pole below when you're away from the boat. This will minimize weathering as well as reduce the chance of theft. The most common storage method is on the deck along the base of the life-line. This gets the poles weight down as low as possible and also gives you additional foot-hold when healing significantly. It is also the most secure of the options. Poles up to 3-1/2" diameter can be stored in stanchion chocks mounted to your life line stanchions, thus eliminating deck chocks and the need to drill holes in the deck. This method offers a great way of keeping the decks clear but is not recommended for the offshore sailor as the added weight and surface area to the stanchions can pose a problem in heavy seas. Poles mounted on the life line stanchions can, in extreme conditions, cause damage to the stanchions or be lost overboard when waves break over the deck. Storing poles vertically up the mast has become very popular in recent years as the pole is always attached to the mast and ready to set. It also eliminates some pole handling, an important consideration with the larger line-controlled poles. Forespar has developed mast cars and storage cars to facilitate this option effectively. Even with vertical mast storage, it is advisable to also have a set of securely mounted deck chocks ready to accept the pole in severe weather. This gets windage and weight off the mast in bad weather and saves the pole in case of de-masting. To set up a vertically stored pole you need the following hardware: An appropriate length of T-track up the forward center face of the mast. A proper mast car to match the pole's inboard end fitting. An up-haul/downhaul mast car control system. A vertical storage mast car of the appropriate diameter for the pole. A chock located near the base of the mast that captures the outboard end of the stored pole. All of the above hardware is available from Forespar with the exception of the up-haul/downhaul control system. These blocks and fittings are made by a number of sailboat hardware manufacturers in a variety of sizes. A local rigger can help you with these parts. 8. Maintenance Maintaining your whisker pole is simple. Keep it clean by flushing with fresh water after use, before storing and with periodic white vinegar baths. The end fittings should not be lubricated with anything. Lubrication will build up and attract salt faster than leaving them dry. The springs and any other mechanisms are stainless steel and should last for years if kept clean. If an end salts up, white vinegar will dissolve the salt without harming any of the components. Simply stand the pole up in a bucket of vinegar, completely immersing the end. In extreme cases it may take a few days of soaking, but this has been found to be the best way of freeing up a frozen end. Never oil or spray a twist-lock pole with any lubricant. Doing so will destroy the lock inside the pole. Forespar will not warrant any pole that has been oiled or sprayed with any lubricants. If a twist-lock style pole is salted up, you can use a rain gutter to soak the entire pole in vinegar. Dam a section of the rain gutter and fill it with white vinegar. Soak the pole for a few days then rinse with fresh water. All Forespar end fittings have replaceable spring and pin repair kits available. Complete end fittings can also be purchased separately. Twist-lock pole repair kits as well as individual pole sections are also available. To determine the kit needed, measure the outside diameter of the pole and contact your dealer or Forespar. 9. Do's and Don'ts Do use a whisker pole to control the headsail in downwind sailing conditions. Do make sure all sheets are slack before setting, telescoping or taking down a pole. Do keep the pole level. Do keep the ends clean and dry. Do store the poles in a manner that protects them from the weather if possible. Do not use a pole in a manner that pulls on the ends. All poles are designed for compression loads not tension. The ends are extremely strong if used properly. Do not use the pole as a lever. Do not attempt to jibe a whisker pole without help. Do not attempt to retract a pole under load. You will not be able to handle any pole under load and can injure yourself. Do not use a whisker pole (telescoping) as a spinnaker pole. They are not designed for the tack loads a conventional spinnaker can produce. Do not fly a pole at angles that can subject the end fittings to loading in directions not intended. This could damage the end fittings. When flying any pole, do not pull it back against a stay or let it fall forward against the headstay. Any pole, no matter what it’s size can be bent or severely damaged if allowed to hit your standing rigging. Do not attempt to return a bent or dented pole for warranty. 10. Tips on Use Whisker poles are set when the apparent wind angles are such that the mainsail begins to blanket the headsail. This happens at different times on various boats but will always occur whenever you are sailing close to downwind. Wing-on-wing sailing is not an easy point of sail without the use of a whisker pole. The jib tends to drift from side to side, unable to maintain its fullness and boat speed suffers along with the thrill of sailing. When the pole is set, holding the headsail out on the opposite side of the main in clear air, there is a very noticeable increase in efficiency and boat speed. Sailing wing-on-wing is much easier than handling a spinnaker and takes less people to handle equipment. With the properly sized whisker pole, end fittings, mast attachment and rigging, downwind sailing becomes very easy, efficient and enjoyable. Boats larger than 22 feet may require a topping lift. The topping lift is a line coming from a point up the mast and holds the outboard end of the pole up. If you do not have a specific topping lift you can use an extra jib halyard, staysail halyard or the unused spinnaker halyard. Note that in using the spinnaker halyard, the lead from the top of the mast may chafe on the headstay. If this happens, do not use the spinnaker halyard for long periods as it will ultimately fail, rig a separate topping lift. Whisker poles usually do not need a downhaul. If, on your boat, you experience a lot of upward lift on the whisker pole, try moving your sheet leads farther forward. This will cause the sheet to go up at a higher angle and help hold the pole down. If the pole still wants to "sky", then check the inboard end height. If it is set too low the pole will want to lift. If the pole still won’t stay down, you can take the lazy sheet (the unused sheet) and hook it over a forward cleat. Do not cleat it off, just use the cleat to turn the sheet aft, then take up on the lazy sheet from the cockpit. This will hold the pole down as well as forward on most boats, eliminating the need to rig a separate downhaul. The jib sheet should be set thru the end fitting without any twist or loops around the end of the pole. Do not attempt to set the end fitting jaws directly into the clew of the sail (the grommet or eye of the sail itself). This will cause a twist in the sail which could damage the end fitting and sail as well. The sheet should run freely thru the end fitting. Do not attach it to the bowline at the jib clew. The reason is that if you need to turn the boat in an emergency or to avoid an object in the water, the sail must be allowed to blow out around the headstay. If the sheet is not allowed to run freely thru the end fitting, the pole could be forced against the stay and bent. If the pole is to be set for long periods, utilizing a separate after-guy and fore-guy offers a certain degree of convenience. These are independent of the jib sheet itself and only control the movement of the pole. This setup is ideal for the cruising sailor with furling sails. Properly set, the pole does not need to be touched in the event of a squall or when you want to shorten the sail. Because the pole is secure, the sail can be furled from the safety of the cockpit while leaving the whisker pole in place. This works well for short handed sailing because you can deal with the pole when it is safe and convenient. Do not attempt to jibe a whisker pole. They must be taken down and reset on the new tack. The reason for this is that, unlike spinnakers, the headsail must pass inside the fore-triangle. With the pole attached near the cleat to what will soon be the wrong jib sheet, and considering the length of the pole and the sail foot, it becomes an almost impossible situation. If the pole is attached to a mast car, you may be able to haul it up, drawing the pole in far enough to pass the outboard end inside the headstay. This only works if the pole length is not considerably longer than the "J" dimension of the boat and there are no staysail stays or baby stays in the way. Do not attempt to retract or telescope a pole under load. You will not be able to handle any pole under load and can injure yourself. Be sure all sheets are slack before setting, telescoping or taking down a pole. Whisker poles are flown with their jaws facing down. Unlike spinnaker poles, having the jaw down does two things: it allows for proper attachment to the topping lift and easier detachment of the jib sheet. On a whisker pole the sheet tends to fall down and out. Whisker poles do not have bridles. The topping lift should always go directly to the outboard end. Whisker poles also do not have full length trip lines (unless they are fixed length). Trip lines on a telescoping pole get in the way when the pole is used at any position short of its full length. 11. The Weight Issue Telescoping poles for boats over 40 feet tend to get heavy. This is because you have two pieces of tube plus the ends as well as the line-control mechanism. To solve part of the weight issue, Forespar has developed the "ULTRA" series of composite ends that are half the weight of the same style aluminum end fittings. These "ULTRA" end fittings have reduced some of the weight of the pole, and this difference is particularly noticeable when you swing the pole. However, to really achieve a substantial reduction in weight the only solution is a carbon fiber pole. Forespar offers adjustable carbon fiber whisker poles in both 13-24 and 15-27 lengths for boats 40 to 55 feet. They are half the weight of their aluminum whisker pole counterparts. Storing the pole up the mast also helps as you need not pick up the full weight of the pole when deploying. The only other way to save weight is to use a fixed length pole. 12. Carbon Fiber Whisker Poles Weighing half as much as the same poles in aluminum the Carbon Fiber Whisker Pole is ideal for the 35 foot and longer boat. They offer the same time-proven line-control mechanism housed in all carbon fiber tubes. "ULTRA" style end fittings complete the assembly to make the lightest, strongest telescoping poles in the world. They cost a bit more than aluminum poles but can be easily handled with a minimum crew. These poles, when properly stored up the mast, make for the ultimate in downwind cruising hardware. The outer tubes are painted white as standard and the inner tubes are carbon black. Fixed length carbon poles can be custom made for almost any size boat. Kevlar chafe protection patches and custom AWLGRIP colors are also available. Contact Forespar direct for more information on our extensive custom carbon fiber production capabilities.

20090916_053240_Whisker_Pole.pdf

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김선장님....안녕하세요......한가지 문의 드립니다....제가 알기로는 스핀이 없는 요트가 풍하코스를 탈때 위스카폴을 사용하는것으로 알고 있습니다...스핀을 사용하는 요트가 스핀폴과 스핀을 해상 상황에 따라 스핀을 치지 않고 위스카폴을 사용한다면,문제가 있지는 않습니까? 아님 미리 스키퍼 미팅때 레이팅 적용을 해야 하지 않나요?....둘다를 가지고 레이스에 참여 할 수는 없고 선택을 해야 할것 같은데?.....잘 몰라서 문의 드립니다......