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Just follow these simple steps and bob's your uncle - all writs to nigel oswald Introduction The International Moth is not the sort of dinghy that sailors step into from another class and automatically win. It is likely that you are an experienced sailor already if you want to sail a Moth. You may find the experience intimidating or embarrassing, but stick with it. One of the beauties of the class is that it takes dedication above and beyond most conventional sailing dinghies. This does not appeal to everyone, but to the select few. To be able to hone your Moth sailing skills so that you can drive the razor-sharp hulls in all conditions is an exhilarating experience. Believe me, you certainly know when you are going fast! There is no substitute for time on the water, but being able to pick the brains of the top sailors is always useful. Even after a few seasons of Moth Sailing, when you think that you are finally getting the hang of it, there is always some technique that can be improved that will increase your boatspeed. That is why we at IMCA UK have put together the following sailing tips. Perhaps this might make your ascent to the pinnacle of the class a little bit easier! The following article has been divided into six categories, Boat Preparation, Rigging Up, Launching, Light Wind Sailing, Medium Wind Sailing and Heavy Air Sailing. Boat Preparation - the vital first step For the less experienced Mothist seeking more speed, the first thing to do is to thoroughly prepare your boat to ensure that you are getting the best possible performance from it. The quickest way to set about this is to try to make your boat as 'standard' as possible. Initially many newcomers to the class think they have a great new idea, not realising that many ideas have been tried out before and discarded. There are many new ideas to be discovered, but initially the quickest way to an understanding of moths and what makes them quick is, to keep it simple. Most moths at the front of the fleet look deceptively simple, do not let this fool you, they have evolved over many years of development. Everything has its place for a reason. Now lets look at each part of the boat individually: Hull Make sure the hull is watertight as a pint of water weighs over a pound. Always fit a breather tube to allow for the expansion and contraction of the air in the hull. It prevents any water being sucked into the hull when it is put on the water on a hot day and the air contracts. or when the hull 'pants' when sailing in rough water. The tubes are usually fitted by the king post on the shroud bulkhead. If your boat has twin tanks you will need two breather tubes. The hull if necessary can be faired up and repainted. Beware of chalked based fillers since these are porous and will actively pass water through by capillary action, or if the hull is sealed, cause blisters under the paint. There are no short cuts to fair a hull. just lots of elbow grease and a long sanding board. A lot of people sand the gloss after painting to achieve a super smooth finish. Tubes and trampolines should be firmly tied down, with special care taken to check the tubes and reinforcing where they cross the gunnel. Look for grazing or stress marks in the aluminium, or lumps where the metal has creased. Check the lacing eyes in the hull and that the trampolines are smooth and cannot chafe the lacing ropes. otherwise a swim is guaranteed. As an additional precaution. an extra knot halfway along and at the corner will ensure that all is not lost if a break occurs. Foils Both foils should be either varnished or painted white. White is good to minimise heat distortion and also see the weed clearly. I prefer varnish as you can see sheathing damage at earlier stages. Ensure the dagger board has the minimum practical clearance in the dagger box to avoid the board from flopping from side to side when sailing. The board should be vertical and on the centreline. The rudder must also be checked for centrality, and the leading edge is below the pintails to avoid the blade stalling out. Equally ensure as little play as possible to avoid tip movement which can cause the same effect. Cheek your rudder and foils regularly for strain marks to avoid breakage's on the water. Masts
and sails Check the boom for fatigue cracks, especially around the kicker section. They can be stopped for a time by drilling a small hole around the end of them to remove the stress point. How long afterwards it will last, is a lottery. Look at the mast alignment with the boom. According to the mast stepping system used, the mast alignment can change according to the position of the boom, when it is rotated. The track should stay straight and in alignment with the boom when it is rotated. The mast should behave identically on both tracks. Hound height and rigging depends on many factors, but again start from known dimensions. 1) check your rigging for wear regularly, especially if you are sailing in rough conditions. It is normal for the thimbles to straighten out, so after a time it may be necessary to drop pins in the shroud plates a hole to compensate. Always use a good size wire, 3mm is suitable with very little stretch in the windy conditions. Next check the sail for chafing, broken batten ties, stitching wearing, holes worn by prodders etc. Take whatever action is needed to put it right, or better still, prevent it from happening. Sail setting is a subject of its own, but quickly check that the curve of the mast is smooth, that the sail shape is clean and even, and the camber is 50%. if the camber is not up the sail, adjust the prodder or spreaders to allow or reduce the correct amount of mast bend. The hound or prodder position may need to be adjusted to correct any major faults. Let the spreaders back or shorten the prodder if the mast is too straight and visa versa. Tell tails can be put on the sail to check on the air flow, but do not put too close to the mast or they will be in its turbulence. I prefer 5 to 6 up the luff approximately 1/4 chord length back from mast. More can be confusing. Control
lines and fittings Rigging
Up It makes good sense to leave as much of your rigging in place at all times, even when trailing. Ideally the boom should be attached with the mainsheet, kicker and outhaul in place. Most helms also leave their cunnigham in place as well, using a quick release fitting or shackle. With all of this rigging in place an experienced Mothie should be able to rig a bolt rope sail rig in about 10-15 minutes and a pocket luff sail in around 20 minutes. Pocket
Luff sails The first step is to make sure that all of you control lines are slack so that the boom can be attached once you have the rig up. Then roll out your sail, making sure the zippers are on the topside if you have such a sail. Slide the mast into the pocket, I prefer to place the mast on top of the cambers as it is then easier to snap them onto the mast. You can either snap the cambers onto the mast before or after you put the rig on the boat, depending on your preference and type of sail. Although on a windy day it is easier to deal with the cambers and apply a bit of batten tension prior to hoisting the rig aloft. Once you have dealt with the sail and mast it is time to attach it to the boat. Make sure that the rig will be facing into the wind once it is aloft. Tip the boat onto one wing and lie the rig across the mast stump with enough slack to attach the sidestays. Then attach the forestay, tying it loosely in place. Now you are ready to put the rig up. Stand with one foot on the wing bar, check that the stays are not tangled, or can snag on anything and raise the rig in one smooth motion. Once you have the mast in position in the mast stump, grab hold of the forestay and push forward, taking up the slack. You should be now be able to let go of the rig, holding it in place with the forestay. Now undo the half hitch you tied in the forestay and pull on some tension. Now your rig should be in place and you should be able to manage this on your own on all but the windiest of days. Once your rig is aloft, the rest is elementary, attach the cunningham to the luff of the sail and pull on a little bit of tension. Then attach the boom to the mast, followed by the outhaul. Once this is done, you should be nearly ready to go sailing. One last point, on batten tension, it is easy to use too much. Especially in light airs, be careful because you may have problems with the battens popping onto the new tack. I find that this technique works well and minimises the risk of dropping your rig onto your foredeck or elsewhere. Other techniques such as raising the rig up, putting it in the mast stump and then attaching the stays also works but you need a friend to assist you and on windy days even with two of you, it can be a bit of a handful. Bolt
Rope Sails First of all
the mast track should be smooth and free from sharp edges, polishing the
inside of the track can help the sail to slide up and down. The battens
should be tensioned just enough to remove the vertical wrinkles in the
batten pockets, any more and: Other
tips Another good idea is to have a piece of elastic on your tiller so that it is self-centering. Do not fit this too tight, just enough so that you feel a light resistance at five degrees of helm or so. Ideally, you should have trampolines that are porous, not pure sailcloth ones. This depends on the windstrength where you sail and your bodyweight, but is nonetheless a good idea. Solid sailcloth trampolines are a pain in strong winds if you capsize, as most sailors do! The wing that is out of the water acts as a sail and the wing in the water will act as a sea anchor. This can make it especially difficult to get enough leverage to right your boat in strong winds, even if you weigh more than 11 stone. Another tip to make your capsize recovery as quick as possible is to have righting ropes under your wing bars so that you can lean back from the wing bar whilst you are standing on the centreboard to give you some extra leverage. Use a piece of ski rope with some elastic threaded through the middle, this will stay tidy and above the water when you are once again upright. Launching
The procedure for launching that follows is specifically for launching off of a beach but the same principals apply to any other launching problems that you may encounter. For inexperienced helms it is advisable to stick to such launching conditions until you are confident of you ability to avoid all obstacles. Hopefully your home club has such facilities! Put the boat in the water at about mid thigh depth. Any deeper and you will have trouble reaching into the boat to grab the foils without having to tip it right on top of you. Put the centreboard into the case and push it down about three-quarters of the way so that it is not going to hit the boom (or the bottom). Now push the rudderblade down, making sure that you are keeping the bow into the wind. If you have a fixed rudder, the best plan is to capsize and fit the rudder, making sure that you are in deep enough water to have the rudder clear the bottom when you right your boat. Don't try to launch like you are recovering from a capsize, that is jumping over the wing bar as it comes up because you will find that the boat will want to sit head to wind. The worst case scenario then is that you find yourself heading back towards the shore! Now locate the mainsheet and grab hold of it making sure that the sail battens are filling on the correct side. This is not so much of a problem in strong winds when you will have more power than you can handle, but in light winds when you need that power to even get in the boat it is imperative. Hold the boat with mainsheet and tiller in each hand. Once the bow is slightly off the wind, you will feel that the boat wants to take off. This is the point when you swiftly leap onto the boat and head inboard as far as the gunwhale. The boat will move along dragging the windward wing in the water until you have managed to sheet in properly. Once you have sheeted in the power will come into the rig and the windward wing will lift out of the water. Make sure to head outboard at this point to counteract the tendency for the boat to heel to leeward. This will take time to learn, do not despair if you capsize. On conventional dinghies the stability of the hull slows down the response of the boat. Without that luxury, Moth sailors just have to learn quicker responses. Once you have got the boat underway, you cannot relax, but at least hopefully, you are heading away from the shore and any obstacles such as moored boats or jetties. Returning
to the shore With a fixed rudder, just pull up a bit of centreboard prior to reaching the shore. Then find a gap where you know that you will be able to capsize to leeward without hitting any obstacles. Come into the shore with your leeward wing in the water and then capsize when you are in shallow enough water that you leeward wing will touch the bottom. Then gracefully climb over your exposed wing bar and step onto the centreboard before heading for the stern to remove your rudder. You can attempt to leap out of your boat without capsizing it, but this is not advisable. If you run aground with a fixed rudder you will do a lot of damage. Don't worry about how capsizing looks to the spectators on the shore. Light
Wind Sailing Generally, slackness is the key to light air success. The rig tension should be slack to aid mast bend and rotation. Make sure that the rig has only a small amount of rake. The battens should be as flexible as is practical. All of you control lines should be relatively slack on all points of sailing, especially with pocket luff sails because they tend to hold their shape more than bolt rope sails and take longer to slacken off along the luff. Upwind Remember to keep you head out of you boat and don't spend too much time looking skywards at your sail. Although great concentration is required just to sail the boat, you must be aware and make use of windshifts. Don't let a sudden knock put you into windward! In puffy conditions, always try to sail in areas with greater wind velocity, even if it is not tactically the best move, you will make much better distance over your rivals if you keep moving and they are caught in a hole but heading the right way. Saying that, it pays to keep in mind that you should try to stick to the side of the course from which any wind increase (e.g. sea breeze) is likely to come. Reaching It is possible to achieve greater speed by gently rocking and sheeting the sail. This is inadvisable because if you are relatively inexperienced you will probably end up capsizing and it is actually illegal! The general excuse that helms use in this situation is "my boat is so unstable that it is the only way to stay in it". This is seldom true and is just a way of cheating, why not use a paddle or an outboard motor? Neither of these means of propulsion is particularly practical in a Moth anyway! Running Running very square in light winds is easier to achieve in a boat with a bolt-rope sail as you will have softer battens in than a pocket luff sail. One of the inherent traits of pocket luff sails is that they use quite stiff battens in all conditions. This is why you will find that the boom will tend to come in towards the centreline of the boat when conditions are very light. The only solutions to this are to let more kicker off or to use a piece of elastic around the boom and forestay to force the boom to relax. Medium
Wind Sailing Upwind Heavy
Wind Sailing Upwind Tacking Try to get a fluent movement going- tricky, i know. Make sure you do not have too much kicker on as this will keep the boat head to wind and/or screw it back into wind after the tack the same problem occurs if you come out of the tack with the main pinned in. Steering is a fine line- steer too much and the boat totally stops through the tack, too little and you you dont get through the wind in the first place. One way of doing it if you are having major difficulties is to dump a fair bit of sheet as you go through but keep steering the boat furhter through the tack, the idea is to come out of it almost on a reach with the main a long way out you can then get your weight out, slowly sheet in and head up to a close hauled possition. This process can then be refined as you get used to it- I AM NOT SAYING THIS IS A FAST WAY OF TACKING BUT JUST A WAY TO MAKE SURE THE BOAT GETS ONTO THE OTHER TACK. I have had a huge problem tacking my new boat so have spent a long time trying to work out faster ways of doing it. In survival condition races i usually try to tack as described above as it ensures you do actually get the boat through the tack, you lose a lot more time sitting head to wind and are much more likely to capsize if you mess up a normal tack (which is very common in a lot of wind). Fast ways of tacking: This is what i seem to have picked up during what seems like hundreds of trial and error tacking sessions while practicing. Most of this is pretty basic stuff really but is often forgotten. (this is all with regard to being powered up, i.e. not light wind) 1.Steer Smoothly and move quickly. Do not over steer or move the tiller too much as you go through (elastic helps this). Do not hesitate, once you have decided to tack do everything at once, dont wait for the boat to come on top of you before getting on the new wing as this keeps the old windward wing in the water too long, slows the boat and gives you a mountain to climb the other side. If you move across the boat as soon as possible you can get on the other wing a lot quicker. 2. Keep the wings out of the water. This is f****ing difficult, takes tons of practice and rarely hapens (but is definitely very fast).Worry about this last. When you do get it right though you will notice that the boat does not completely stop and you come out of it with some momentum- and critically you can still steer a moving boat, i.e. you can bear the boat away from head to wind without serious tiller wagging. I think i manage this on about 2% of medium wind tacks but im working on it. 3. Stay as far forward for as long as you can. This also helps the boat keep going through the tacks. The best way i have found of doing it is as you come into the boat, keep your body forward of the mainsheet blocks for as long as possible and as you go round the back of the mainsheet, move you body very quicklyback and then forward as soon as you are round the mainsheet. In light to medium conditions, you would be supprised how easy this is and in these conditions, i find it makes a big difference. 4. When the battens flick make sure the rudder is central. When the battens pop, you get a sudden surge of power, if the rudder is central (even if you are still pointing too close to the wind) you will accelerate out with this (and then bear off if necessary). If you are still pushing the boat through as the battens flick, the rudder acts as a brake, has very little flow over it so no steerage and the boat will want to go back head to wind. Reaching Beam/Broad reaching: Sit right at the back of the wing bar, if the nose is still digging in when the wind gusts try, to hike at an angle off the back. Play the main in and out in the gusts so the boat is dead flat. You may have to weave around to prevent the bow digging into the wave in front, bear away going down the back of the wave and luff up just before the front of the boat reaches the troughs. Running Gybing Capsizing
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