Upwind Sail Trim

Sea Breeze. Upwind (Sailing) to windward. side and lower on the downwind side. But what should the sail trim be as the wind builds and exceeds your comfort level? Peak Wind. Just as in the first video scene, coming in on a beam reach allows the best control of the boat at slow speeds. Others tend to practically live on the pinch, never allowing the sail to fully enjoy great flow and power. • Few rules • Mostly basic principles. Commander twin batten sails available in 1m, 0. On Day 1 and 2 of the championship we experienced light to medium winds ranging from 5 - 12 knots and I thought that in these wind speeds your mainsheet trim was critical if you wanted to sail fast and point high on the upwind legs. To go upwind or across the wind, a boat must get lift from its sails. A guide for racing covers the principles of sail trim, crew movement techniques, maneuvers, and control systems, and gives advice on adjusting to special. Knowing how to trim your sails properly will take your cruising to the next level to the next level of performance and comfort. While it is impossible to sail directly into the wind, it is possible to move upwind by sailing at an angle across the wind. In very light airs, the wind struggles to follow the curve of a deeply rounded sail. Whether you are simply enjoying an evening sail or hard-core offshore cruising, consider our line of Cruising Asymmetrical Spinnakers. Tightening the mainsheet tightens the leech (reducing twist), rounding up the back of the sail and forcing the boat into the wind and making it point. Proper sail trim is an important part of sailing. North Sails fast VX One sails Jeff Westcott Tuning. Mainsails must perform over a wide variety of sailing conditions. This failure is due to the additional drag caused by inappropriate sail trim. THE SAIL AS AN AIRFOIL - SAILING UPWIND As a boat sails into the oncoming wind, the sail splits and bends the airstream. As such, I need fairly strong winds to go upwind. Sailing Lessons. As you bear off you should ease the sails, and as you head up, trim the sails. adjusting sheet leads is essential for good sail trim. Also, the apparent wind is much lower while running and the boat and crew can be overwhelmed as they turn into the wind. trim the sails and at any time trade places with you if you so desire. In general, the tighter the sail is sheeted, the better it will point and sail. Please read this before the next class and practice your knots: the bowline and the stunsail tack bend. Upwind Sail Trim. Now an airplane wing has to be at a certain angle to the wind, or it doesn't work. sail trim, or weight distribution (or all three) in order to maximize boat speed. • Sail trim is ineffective with bad boat trim. Sailing the Kayaksailor is very intuitive, and I did not find it complicated at all. Mainsail Trim. When close reaching, keep. On a sailboat, wind blowing against the boat at an angle inflates the sail, and it forms a similar foil shape, creating a difference in pressure that pushes the sail perpendicular to the wind. On a boat with a boom you can stretch the sail along the boom and mast to make it flatter and you can reduce the stretch and bend the mast (on some boats) to make the sail fuller. A wide variety of trim settings provides a massive wind range. Some controls are used to shape the sail for given conditions (such as deep in light wind and flat in heavy wind), and other controls position the sail in the wind coming across the boat. Moving upwind, you’ll be tacking back and forth from close-hauled to close-hauled, sails trimmed in until they’re just about in line with the center of the boat. Many upwind lineups occur where the leeward boat ends up sailing off too low, and after just a few minutes, can be as much as 10 or more boat lengths low of the track they started on. This Bruce Farr designed boat offers the performance every racer desires, and the comfort that all cruisers look for in a sail boat. looking for a way to improve upwind sailing. He and coauthor, Gary Jobson, sailed aboard Defender in the 1983 America's Cup. Flying Scots love to breath. The secret of upwind sailing is balance. Now pull the sheet hard. Finding your equilibrium when sailing upwind is difficult, but once you balance everything, forward progress will come rapidly. Therefore, adjust the trim of your boat and sails to keep your rudder centered and your helm neutral as much as possible. North Sails expert Zeke Horowitz shares important J/70 upwind sail trim takeaways from his recent experience in California, USA at Long Beach Race Week. • Self tacking upwind • Self vanging downwind • Up and downwind jib control based on a simple & effective principle • Sail more easily and more efficiently! • White Powder Coated (base only) • Perfect trim of your 100% self-tacking jib Wing and Wing downwind ". So do a deal with the wind gods for permanent gas, or read on to get some decent upwind tips, whatever level you're currently at. Moving upwind, you’ll be tacking back and forth from close-hauled to close-hauled, sails trimmed in until they’re just about in line with the center of the boat. In 10 to 12 knots of wind with the sails fully deployed we expect to have the helm just slightly above neutral or with a small amount of helm. What is sailing Downwind? Boats cannot sail well with the wind directly behind them. What is remarkable about the rig is the ease of use. Tacking - Release old sheet, tack new sheet and tail from the weather rail. This difference, maybe a foot up/down at the end of the boom or 1 ½ feet of sheet, is the range of trim for upwind. Moderate wind (full power) Keep boat flat, crew weight. Sailing Fast Upwind. Sail trim for Speed, all telltales tell tales is hiding half the time! Correct depth and sheet tension for upwind sailing. Americas Cup AC72 True Vs Apparent Wind – Upwind. A twisted sail will have the top batten aimed to leeward. Part 1: Induced Drag and Mainsail Leeches. The helmsman will reference the bottom set of telltales to steer the boat at the best angle relative to the wind. Every time a gust hits, point up higher to let the sail luff. The more you heel the boat the more you will generate windward helm. Some controls are used to shape the sail for given conditions (such as deep in light wind and flat in heavy wind), and other controls position the sail in the wind coming across the boat. When we learned to sail 10, 20, 30 years ago we were told that when a gust hits the boat – we ease sails and then point up a lot higher, allowing the sails to luff. This results in a flat, efficient sail shape with low drag. It's a nice idea, but unfortunately it doesn't fit too well with the laws of nature. As the wind presses directly into the sails to make them puff out, that natural force propels the boat forward. The racecourse is set just west of the main dock approach and has the potential to provide challenging wind and current conditions. indicate the average trim of the sail. Sailtrim upwind one is the first and only animated sail to learn everything about the perfect sail trim. 95, the the sail area SA. Downhaul to take out the creases when kicker on, harder on if very windy, off reaching or running. Sailing Upwind in Breeze Posted October 18, 2017 Fall is finally here, and for those who aren't lucky enough to live in places such as San Francisco, Newport, or Buzzards Bay, it's time for the best breeze of the year. As with all matters of varying boat gear and sail trim, it's best to experiment with your own boat to see what configuration produces the most speed. Passing doesn’t mean you know it all and failing just means you have to hit the books. Sail Trim Mysteries Explained by Ralph Taylor Our Goals Today Foundationfor understanding. Just sail on a beam reach, and work the shifts for all they're worth until you eventually get there. Moderate Air Days Max trim, slight stall for point. For this reason, a numerical investigation has been carried out to find the best heel and trim angles in upwind sailing. If draft was only achieved by this method, the flow would be too far forward for efficient sailing. VMG: Velocity Made Good. starting 3. Upwind - Light Air - 0 to 8 knots. Additionally, jib trim angle can be adjusted from sliding jib block cars. And that's the system now set up for us to track upwind. I found the information that I had lacked from this book so it is useful for sail racers. Some that say this may be correct. Trim on a little for the opposite of all that. Find More Videos at the Interlake Sailing Class YouTube Channel! Site Index. trim-trim-pump to gybe, trim the sail in and give it a good pump, again something I would have to do in similar conditions because it is not yet clear how I can gybe from directly downwind. Mounted on a single kayak, the acceleration is neck-snapping, with good handling upwind and down and 9-knot potential. The spade twin rudders optimize upwind sailing angles and provide the best traction when heeled. Sailing downwind is at least as tactical as sailing upwind with huge gains to be made by sailing at the right angles on the right shifts. Begin sailing on a reach by picking a distant point to aim for. It's one of the joys of Apparent wind sailing is the trimming principles are the same upwind and down, trim it to the telltales and go. Mainsail Trim. We have all felt that jarring crash when the boat falls off a wave, or wondered whether we might be better off under engine when the GPS’s ETA refuses to fall. FAST UPWIND How to get the best performance upwind, by Steve Thompson This article is written in the perspective of sailing a modern sport boat Lets look at how to sail sport boats for optimum performance, beginning with boat preparation. He rarely if ever, touches his trapeze line. Just ease the mainsheet, pole out the genoa, engage autopilot, mix a drink and let the miles tick away as a cooling breeze rolls across the transom. This is theoretically true, but involves balancing many factors according to conditions and perfor-mance goals. The upwind sails need to work together to increase the performance of the overall sail plan. Mainsail Trim. Sail Trim and Boat Handling DVD;. Sail trim is a big part of a sailor’s knowledge base. , for a talk on specific sail trim for down wind and upwind, with insight into hardware and systems to make trimming easier. Measurements confirm that relative to the air pressure far from the sail, the pressure is higher on the upwind 38 February 2008 Physics Today. Others tend to practically live on the pinch, never allowing the sail to fully enjoy great flow and power. The sails should be let out about one quarter of the way. There were several other sail boats near us, which to me is the definition of sailing race. proper sail trim o body positioning; tacking and gibing techniques; ability to increase or decrease speed by altering sail trim; keeps boat flat upwind and reaching/ heels to windward downwind. The Vi-8 3Di Mainsail is an all purpose sail for the Moth. Typically designed for modern cruising boats that utilize non-overlapping headsails. Boat 2 is somewhat downwind of the leading boat, but still also gets the disturbed air in its sails. First page contains most of the measurements as well as scoring options with ratings provided for different wind and sea state conditions, Second page is reserved for all the inventories of sails, tanks, anchors & chains and other items recoreded to be on board while racing. Also, does your analysis software account for various sail trim positions? e. SAIL FASTER SAIL SAFER advanced techniques series Part 4: Upwind trim. Attitude Sails RPM test: "A breath of fresh air sees excellence arrive in the windsurfing world out of the. Likewise, it turns upwind when heeled to leeward. Simplified Sail Tuning and Trim Introduction: Being a great fan of the KISS principle, we have reduced our upwind sail tuning to a nice, simple three-step process on W3854: 1. Using North 'U' Sail Trim simulation imagery and supporting software the Prof will be demonstrating the theory and practice of upwind sail trim and how to optimise your set-up for differing winds and sea states. You need to trim the head of the sail to be looser than the foot to create twist and increase sail power. If you trim as you would in medium wind conditions, the boat will just roll over and play dead. However, with the proper technique, this is something you can use the waves as an asset when sailing upwind. Upwind, the mainsheet has another critical function: it controls leech tension. When close reaching, keep. Weather (1) Weather (2) Balance. We make it easy to get new sails custom designed for your sailboat or sailing yacht, at the best prices online. For the Racer Being able to effectively 'mode' your boat at any time on the race course can greatly improve your racing performance. Sailing the Kayaksailor is very intuitive, and I did not find it complicated at all. From day one we assumed a requirement for three rigs of differing sail areas to cater for the desired crew weight range: RS Aero 5 – RS Aero 7 – RS Aero 9. He and coauthor, Gary Jobson, sailed aboard Defender in the 1983 America's Cup. Set the halyard to take the wrinkles out of the luff of the sail. While it may feel counterproductive to sail a hot angle when your destination is downwind of you, consider that using an asymmetrical spinnaker downwind is just like tacking upwind except that you’re jibing. The key concept is that upwind (beam reach and higher) the sail is a wing, it works just like the wing of an airplane. This picture was taken in a race this past January. Weather mark - Ease jib 6" and cleat it. This excess material in the sail converts to draft when the sail is attached to a straight mast. If it wasn’t, we would put turns on the uppers. About Precision Sails. Experienced sailors have turned this process into an artform. For example, if the course is an Olympic (triangle windward, leeward, finish to windward), we sail upwind tack a few times, sail our angle to the first reach mark, and determine whether we can fly the whisker pole. Speed Tips for the First Beat by David Dellenbaugh. Upwind the helm hikes, steers and trims the mainsail just as they did in their junior class, while the crew actively trims the jib, trapezes, and provides tactical information to the helm from their higher viewpoint. FAST UPWIND How to get the best performance upwind, by Steve Thompson This article is written in the perspective of sailing a modern sport boat Lets look at how to sail sport boats for optimum performance, beginning with boat preparation. Be prepared to adjust the vang continually downwind and sail where you are comfortable. Brad White On Sail Trim And Maintenance Long-time service and sales rep Brad White of North Sails invites us to the North Sails Loft in Salem, Mass. Would you not get better upwind performance with a larger jib that is moved forward to the tip of the bow? Cruiser/racers also keep that jib pretty close to the deck so you might try lowering it a bit as well to see if you get better upwind numbers. The actual true and apparent wind angle for maximum VMG will vary on wind conditions and sail choice. 9 shows how CX and CY are correlated with circulation C is given by C = L/(qU1b), where L is the lift force, q CL and CD, and the effect of a change in the sail trim. Forums > Windsurfing > > General. 3) sail* so your boat is fully prepared and you are ready to use your new controls. Think about how that could relate to sailing efficiently upwind. The Clubhouse will be open from 18. Taking the first step into the sailing community can sometimes feel more like a giant leap. The keel is always placed so that the forces on the yacht are in balance both regarding heel and trim. Walker] on Amazon. You can't go straight up, so you have to follow a winding road, zig-zagging back and forth. Yes, keep an eye on the telltales, but it is very important not to be overheeled, which allows the boat to slip sideways. Flat water is assumed. Genoas/jibs are upwind sails by design, but get much use downwind. But sail too close to the wind and the sail will “luff”— the forward edge will start to flutter in and out and the boat will slow down. Upwind (Sailing) to windward. He was a sailing instructor for 12 years and a Performance Sail Trim course instructor at Humber College for 12 years. When you ease, the cunningham will look much harder. For example, if the course is an Olympic (triangle windward, leeward, finish to windward), we sail upwind tack a few times, sail our angle to the first reach mark, and determine whether we can fly the whisker pole. He was a sailing instructor for 12 years and a Performance Sail Trim course instructor at Humber College for 12 years. 2) More wind than waves. If the trailing edges are fine, less than 2 mm the edges can have a flat with sharp corners. An experiment was performed in the Yacht Research Unit’s Twisted Flow Wind Tunnel (University of Auckland) to test the effect of dynamic trimming on three IMOCA 60 inspired mainsail models in an upwind ( AW = 60°) unheeled configuration. Grab the appropriate sail, check the number and put your sailing card up on the board. Normal wind A clear indication that the chosen mastfoot position is too far back is the fact that it is not possible for me to put down the sail on the board during a full downwind ride. This is a shot of us sailing upwind close hauled, boat speed 5. Going upwind you generally pull the sails all the way in and then use them as a guide to steer the boat. When sailing downwind the apparent wind is less than when sailing upwind but you can still get strong winds sailing downwind and light wind sailing upwind. Jon has plenty of helpful videos on his YouTube channel jonemmettsailing. This point of sail lets the boat travel diagonally upwind. As the boat gains speed it becomes much easier to gain height. When wind meets sails, interesting things. We'll look at initial trim settings for upwind sailing, and refinements for varied conditions. Upwind Sail Trim It is important to trim the genoa/jib to the prevailing conditions; the Sigma 38 is a heavy boat and requires time to build speed after the boat has tacked. Draft Moderate depth, starting to flatten Twist No twist for maximum power. The more your boat is balanced the faster it will go. Trim Your Jib Sail Like a Pro. There are two solutions to this problem: Add weight to the rail or pull the vang on and hike. The boat is nimble, responsive and very lively. 8 ★, 1,000+ downloads) → Easy sailtrim, seen virtually What effects do Genua Cars, Backstays, Traveller and Halyard tension might User-friendly ads for your Android app Monetize with the AppBrain SDK Check it out. Hauville1 , P. small lump of clay; protractor; pair of scissors; transparent tape; metric ruler; unsharpened pencil; clear plastic wrap. A numerical comparison between two FSI models, based on inviscid and viscous flow solvers, is presented in this paper. Experienced sailors have turned this process into an artform. Commander twin batten sails available in 1m, 0. We make it easy to get new sails custom designed for your sailboat or sailing yacht, at the best prices online. #3: Trim the Sails • That’s what we’ll talk about now. Good sails should be responsive enough to go through the range from full curving arcs to power the boat in the lightest winds,. I had real issues keeping her in the groove , especially upwind, and was hoping to get any tips and techniques from other owners on sail trim under a reef? I am planning on racing over winter so need to get up to speed on how they like to be trimmed in heavier winds!. In very light airs, the wind struggles to follow the curve of a deeply rounded sail. The more you sail the more you will be looking at the angle of attack, center of effort, sailing the sails flatter, etc. Boat Trim (as opposed to sail. In the afternoon they did an upwind triangle. For this reason, a numerical investigation has been carried out to find the best heel and trim angles in upwind sailing. Reaching means you have 180 degrees of potential travel. I could see that his sails were trimmed in a lot more than mine were. Then tackle the physical aspects of sailing forces and techniques, sail applications, marlinespike, helmsmanship, and handling of difficult sailing conditions. Polyester, generally known as Dacron. A new App shows what happens when you are trimming the sail. The disadvantage is that a bulb keel usually has a lower lift to drag. We make it easy to get new sails custom designed for your sailboat or sailing yacht, at the best prices online. First page contains most of the measurements as well as scoring options with ratings provided for different wind and sea state conditions, Second page is reserved for all the inventories of sails, tanks, anchors & chains and other items recoreded to be on board while racing. As one who races sailboats and who has a background in fluid dynamics, I can attest that a sailboat will go upwind best with proper sail trim. Sailing gives examples of physics: Newton's laws, vector subtraction, Archimedes' principle and others. Home › Forums › Technical › Centreboard trim – upwind and downwind This topic contains 8 replies, has 4 voices, and was last updated by NickCraig 8 years, 1 month ago. Think about how that could relate to sailing efficiently upwind. upwind sailing such as boat handling skills and some basic upwind tactics. However, you will find a few trioptimal designs in a woven polyester cloth, and most nylon downwind sails are designed in a trioptimal cut. Everything You Always Wanted to Know About Sail Trim And Don't Be Afraid to Ask…. Typically designed for modern cruising boats that utilize non-overlapping headsails. is the drawing accurate in relation to the bad air? what about to leeward ?. The thing is most models and ships at a mooring have the yards squared up (perpendicular to the mast). As such, I need fairly strong winds to go upwind. It is important to trim the sails to be as powerful as possible; this is done by easing the backstay and outhaul right off and relaxing luff tension. Same with a sail. is the drawing accurate in relation to the bad air? what about to leeward ?. Polyester, generally known as Dacron. Trim Your Jib Sail Like a Pro. Sailing upwind as a process - in medium wind strength. Think about how that could relate to sailing efficiently upwind. 1 - Mainsail Trim. Have fun. Sailing Upwind in Breeze Posted October 18, 2017 Fall is finally here, and for those who aren’t lucky enough to live in places such as San Francisco, Newport, or Buzzards Bay, it’s time for the best breeze of the year. Tacking - Release old sheet, tack new sheet and tail from the weather rail. As you head up, you will need to sheet in to maintain effective sail trim because turning upwind will change the angle at which the wind starts flowing over the sail. But sail too close to the wind and the sail will "luff"— the forward edge will start to flutter in and out and the boat will slow down. Can a sail which is rigged to cant off wind be also canted upwind, in theory and/practice? Presumably, easing the sail forward on the mast would tend to trim-out any weather-helm. Simplified Sail Tuning and Trim Introduction: Being a great fan of the KISS principle, we have reduced our upwind sail tuning to a nice, simple three-step process on W3854: 1. The keel and rudder trailing edges should be carefully maintained to ensure good water flow off the trailing edges. The equations of equilibrium are thus solved to find the best setup (combination of sails, sail trim, etc. Chapter 11 deals with that all important part of being a good sailor. The boat with the sail number 6 is directly in the wind shadow of the leading boat. I was soon hopping about the boat, checking sail trim, winching in sheets, tweaking the traveler, considering tactics as my crew and passengers looked on in admiration and amazement at my sailing prowess. He is all about sitting, keeping the boat in control, and making it through the 3-6 tacks it takes to get out. Mast length is 146cm for 0. North Sails expert Zeke Horowitz shares important J/70 upwind sail trim takeaways from his recent experience in California, USA at Long Beach Race Week. The MC Sailing Association thanks you for your support. Boat B needs to tack immediately, she is about to sail out of the cone. As the Laser Olympic dinghy is one of the highest-level sail racing classes in the world, there is an interest in obtaining physical facts around the experience that already exist. I want to optimize my kit and technique to be more like sailing boats and long boards, one hull and a couple of sails with good light air and upwind performance. - Optimising trim and sail area for different conditions - Downwind sailing, including reefing, pole out headsail, spinnaker, gybing and strategy - Upwind sailing, including various depowering methods, reefing, efficient tacking and strategy - Heavy weather sailing - Sailing in light winds. Once the race committee posts the course to be sailed we sail that course in miniature. Construct a simple model sail and test it to see what your minimal tack angle is. Boat Trim (as opposed to sail. Most people concentrate on upwind speed and trim but ask little about down wind and reaches. 7 offers great one design class racing, but also performs very well under handicap rules. This chapter is excerpted from their new book Speed Sailing, published by Hearst Marine Books. But simple tell tales of yarn attached to the sails will tell you so much about whether you are sheeted in at the corect angles. This helps a lot with the sail trim, to keep the sail into the corner, and shows how close they can point the boat until the sail starts luffing. Can a sail which is rigged to cant off wind be also canted upwind, in theory and/practice? Presumably, easing the sail forward on the mast would tend to trim-out any weather-helm. Kicker on upwind, more so in a blow. Sailtrim upwind one is the first and only animated sail to learn everything about the perfect sail trim. The secret of upwind sailing is balance. The goal when sailing downwind is to present as much sail area to the wind as possible. Weather mark - Ease jib 6" and cleat it. upwind), the boat that sails the shortest distance will be the first one to round the weather mark. The actual true and apparent wind angle for maximum VMG will vary on wind conditions and sail choice. • Self tacking upwind • Self vanging downwind • Up and downwind jib control based on a simple & effective principle • Sail more easily and more efficiently! • White Powder Coated (base only) • Perfect trim of your 100% self-tacking jib Wing and Wing downwind ". So how do we judge how to trim the mainsheet? I don't yet know the best way. This is where the highest sailing skills often form the essence of the race. The feel of the helm should tell you a lot about your sail trim - if it is hard to steer, then trim the sails again. This affects the rig in two significant ways:firstly, it allows the mast to straighten up fore and aft, which reduces pre-bend. Since the boat is very weight-sensitive and more weight hurts you downwind, the best solution is to use the vang, and a lot of it. The points of sail diagram shows boats sailing at all different angles to the wind in the sail zone. Sail designer carefully checks sails in CFD for resultant forces and heeling moment. The ability to sail upwind better than your opponent has won races, saved lives and won wars. Students must be at least 8 years old, able to swim 75 yards without a lifejacket, and be able to right a capsized boat. Speed wins races. Most boats sail best with just a little weather helm upwind. Then go sailing and everytime you get over-powered, let the main out to bring you flat. Airflow is critical in light air. During the design process, once the preferred keel configuration and rig type are chosen, it is simply a matter of balancing them against each other in order to obtain the required lead for the sail area vs the lateral area, and to place the ballast where required for proper trim. Luff tension: It should be loose. optimized for eased out, upwind trim in the middle of the target wind range. Devices using earlier an earlier iOS may not display correctly. Easing off and Pinching will slow the boat and cause it to slip sideways. One "tip" to achieve such is to pull down on the clew or hang your arm over the sheet. The SailRig components weigh only about 30lbs total. Both the helm and crew actively trim sails upwind and down. More twist requir ed Reading the. You'll have the worst VMG in your club, but the best boat speed" Chicken Tack "Don't listen to those shifty guys, with the right sail trim and boat handling, it will in fact beatat 89 ° of the wind. On a sailboat, wind blowing against the boat at an angle inflates the sail, and it forms a similar foil shape, creating a difference in pressure that pushes the sail perpendicular to the wind. The wind is constant in intensity and direction and the sea is calm. Hauville1, P. The wind and wave conditions change constantly as you sail upwind, so you must continually adjust the trim of boat and sails. Would you not get better upwind performance with a larger jib that is moved forward to the tip of the bow? Cruiser/racers also keep that jib pretty close to the deck so you might try lowering it a bit as well to see if you get better upwind numbers. No matter what you race, you’ve got to be fast to win. To start you have to be as close to the class weight limit as possible. Now an airplane wing has to be at a certain angle to the wind, or it doesn't work. 2) More wind than waves. Also, the apparent wind is much lower while running and the boat and crew can be overwhelmed as they turn into the wind. Yeah, I know, Tom Burton hikes harder than I hike. In the afternoon they did an upwind triangle. DO experiment with the trim of the sails and the course sailed to seek out the optimal VMG in a range of conditions. The intricacies of good sail. This makes you generally slower, and crushes your ability to point or hold your lane. The wind is constant in intensity and direction and the sea is calm. Mainsail trim • The jib leads upwind trim, the main follows • Lots more control over main – can be confusing! • Sheet is primary control – Initial trim to bring aft end of top batten parallel to boom – Boom on centreline – Leach tell tales flying all time (top one 90% is OK). When sailing upwind, it's easy to stop the boat by heading into the wind; a sailor has no such easy out when running. Simplified Sail Tuning and Trim Introduction: Being a great fan of the KISS principle, we have reduced our upwind sail tuning to a nice, simple three-step process on W3854: 1. There is a saying that defines what makes for good upwind sailing: speed first, then pointing. The system consists of three OEM packages: Auto Tack simplifies upwind maneuvers, Auto Trim maintains perfect trim and heel, and Sail. However, with the proper technique, this is something you can use the waves as an asset when sailing upwind. This will not only give the longest waterline length, but also give the minimum wetted surface and related skin. Proper upwind jib lead position will require hard sheeting to bring the head of the sail in. Wind was probably about 12-15 gusting 18. Upwind - Tail jib sheet (do not cleat it). He rarely if ever, touches his trapeze line. Its important to hike hard to sail fast while not forgetting that tactics and strategy still come into play. Remember that the sails are trimmed differently for each point of sail. Interlake Reaching. • Self tacking upwind • Self vanging downwind • Up and downwind jib control based on a simple & effective principle • Sail more easily and more efficiently! • White Powder Coated (base only) • Perfect trim of your 100% self-tacking jib Wing and Wing downwind ". Find More Videos at the Interlake Sailing Class YouTube Channel! Site Index. Sail Trim and Shape. 9 shows how CX and CY are correlated with circulation C is given by C = L/(qU1b), where L is the lift force, q CL and CD, and the effect of a change in the sail trim. This is practically the largest yacht a couple would want to handle. How to Trim Sails Upwind. indicate the average trim of the sail. Advanced Dinghy Sailing. Much of the information on this page applies to sailboats generally, but some of the information – particularly the description of how the sails are rigged – is specific to the type of boat that Northern Light is, a Santana 35. You will get acces to 30min of video. A sailboat's apparent wind angle is also always shifting, moving forward when accelerating and backward when slowing. Professional sail design at our full service loft in North. This tuning guide was written as a reference to help M242 sailors easily achieve race ready trim and speed. #3: Trim the Sails • That’s what we’ll talk about now. Reefing Sails. Sailing medicine has been mainly addressed by healthcare professionals who happen to sail. Mainsail trim • The jib leads upwind trim, the main follows • Lots more control over main – can be confusing! • Sheet is primary control – Initial trim to bring aft end of top batten parallel to boom – Boom on centreline – Leach tell tales flying all time (top one 90% is OK). Get the critical increment of Fast at a North U Trim Seminar, with Andrew Kerr.