The basic principles and their relationship to sail. For most sailors, the theory of sails is a mystery. Three reasons to twist out the top of the sail sailing blog. Our trimming efforts aim at making the entire sail, from foot to head, present to the wind evenly and at the correct angle. Matched to specific boat designs, the simulator provides control over main and jib trim, including mainsheet, backstay, traveler, cunningham, jib sheet, jib lead, and jib halyard as well as the helm. The physics of sailing arises from a balance of forces between the wind powering the sailing craft as it passes over its sails and the resistance by the sailing craft against being blown off course, which is provided in the water by the keel, rudder, underwater foils and other elements of the underbody of a sailboat, on ice by the runners of an ice boat, or on land by the wheels of a sail. During the sailing in france on the coast of normandy from calais to dieppe we had a perfect gennaker weather for 82 miles. Maximum sail powermakes the process of using sails and understanding their theory easy. Basic trim is achieved by simply easing the sail until it.
The mainsheet is the most important single sail trim control on the boat. Nightboat books, a nonprofit organization, seeks to develop audiences for writers whose work resists convention and transcends boundaries, by publishing books rich with poignancy, intelligence and risk. Mainsail trim progression wind seas traveller outhaul vang cunn halyard backsty sheet drifting flat full windwrd medium support boom up eased min min boom well below centre light 26 kts flat full windwrd tight support boom eased min medium centre boom light med 6 9 kts flat adjust for top battenc entre boom tight na eased tight. Driven by the north sails design suite, the north u sail trim simulator lets you explore proper upwind trim with the full range of sail controls. Featuring over 150 lofts across the globe, innovative products and materials, and the north sails collection. Best book that ive read by far is frank bethwaites book high performance sailing. Mar, 2010 sail trim and balance lecture from singles on sailboats spring training. Sailing employs the windacting on sails, wingsails or kitesto propel a craft on the surface of the water sailing ship, sailboat, windsurfer, or kitesurfer, on ice or on land over a chosen course, which is often part of a larger plan of navigation a course defined with respect to the true wind direction is called a. Andrus enjoying the gennaker sailing on the coast of normandy onboard suwena we have a north sails g3 gennaker with a dousing sock and its area is 114 m2. Trim of main sail and head sail sag in the forestay planform of the foresail camber of mainsail and foresail for the stewart 34 the tension on the cap shrouds can be added to this list of factors that control the gap width. As the gennaker is a form of reaching sail and is wide overlapping we will need this long sheet for sure to be flexible on the point of sails.
You would think a book entitled sail trim might actually have more than a few pages on that topic. The mainsail will need to be eased further than you think. Ultimately this book will have you itching to get back afloat and tinkering with the trim of your sails. The integration of cameras, computers, and trimmers takes the guesswork out of getting sails set up correctly. Written by bill gladstone, the north u sail trim book covers every facet of sail trim, boat speed, and boat handling. Instead, you get 20 pages on poorly simplified and misrepresented fluid dynamics granted, i was an aerospace engineer in college, 30 pages on different kinds of boats, 15 pages about a new automated sail trim on some crazy german boat, and 2 pages that with no real explanation dictate. Regardless of the point of sail, the basic principles apply. Use our how to section to search for content and read about topics of interest to you. From the experts boat speed by jb braun finely tuned. Run the sheets through the gennaker blocks and tie them o. If a second overlapping sail is added much of this turbulence. They understand that speed is always good, at least on the water, and properly. An illustrated guide wiley nautical by marks, felix isbn.
Downwind ease outhaul so that at least a fist wide gap exists between foot and boom. Uniquely illustrated nautical manuals sail trim rig. He and coauthor, gary jobson, sailed aboard defender in the 1983 americas cup. I highly recommend it to sailors that are from intermediate to doesntquiteknowitall.
What makes this book different from the most other books on the topic, is the short, concentrated text with adjacent corresponding illustrations. Drum roll the most important change heeling force into forward force. The book is further enhanced by a range of clear, well thought out illustrations. The race pack includes both the racing tactics book and racing tactics usb and the. Pbk, 170mm x 240mm, 80 pages, full colour illustrations. Thistle tuning guide dieball sailing 2009 our tuning guide is intended to make sailing your thistle as clear and straightforward as possible. The gale sail eliminates the need for a removable headstay. Trim an asymmetric spinnaker on a sport boat north sails. One of the twopart gladstone performance racing series, this book discusses sail trim, boathandling, preparation and tuning. After all, a well trimmed cruising yacht will be better balanced, easier to handle, and will sail more comfortably. This book does an outstanding job of condensing the rather large topic of sail trim and rig tuning into one concise, illustrated book. Everything you always wanted to know about sail trim. The difference between midfleet and podium is just a couple percent.
A beautifully, uniquely illustrated nautical guide to how to trim your sails and rig for maximum performance. The trim book gives complete coverage to upwind and downwind sail trim and boat handling, including mainsail and genoa trim, helming and the trim and. Effects of rig tension on sailing yacht performance. In sailing the boats we can offer these general ideas and observations that will apply to the 311s through to the newest. It deals with every aspect of ship design and handles a wide range of both merchant ships and naval ships with authority.
In this series, quantum sails expert david flynn shows you how to get the most. Gennaker trim gennaker setup hoisting the gennaker adjusting the gennaker set gennaker with the wind abeam how to trim the gennaker gybing the gennaker take down the gennaker. The evergrowing demand for commercial activities at sea has meant that ships are rapidly developing and that the rules governing their construction and operation are changing. This tactical advice is all mixed in with sail trim and how to get the best from your boat, which is music to the racing mans ears. From the experts boat speed by jb braun septemberoctober 2017 sw 022 largest amount of reverse pressure indicated by the largest area of red of curl to the sails lu the middle image is the ideal trim for this point of sail. Expert sailors alter and experiment with their sails trim almost continuously. If the sail is not luffing, let it out until it luffs a bit, then pull it back in a little. The basic principles and their relationship to sail trim upwind sail trimming basic principles m ost people assume that there is an ideal trim setting for every given sailing situation.
By trimming both the tack line and spinnaker sheet, we can transform the sail from a genoa to a spinnaker, and back again. Sail trim can be bewildering to the novice, but the rya sail trim book talks you through the subject in an informative yet entertaining manner. A laser taining manual callala junior sailing school. Samples of how to tune the gennaker from this uniquely illustrated sail trim and rig tuning manual with 150 color illustrations. This chapter is excerpted from their new book speed sailing, published by hearst marine books. Superior boat speed depends on adjustments to your rig and sails. Book description the bestillustrated manual ever on tuning the sails and rigs of a yacht or small keelboat features 152 color diagrams and a brilliantly concise text. Sailmaker ed botterell talks about sail trim aboard backdraft, a 33foot nonsuch sailing in buttonwood sound in the florida keys. Putting highquality sails on your boat is a great start. We can call this the sail s presentation to the wind. Jun 08, 2012 best book that ive read by far is frank bethwaites book high performance sailing. Nautical and general interest books with a large selection of royal yachting association rya books. Sep 17, 2015 north sails trim for speed awesome trim video from north sails with tom whidden, tom mclaughlin, gary weismann and hans fogh 5. If you continue browsing the site, you agree to the use of cookies on this website.
Almost wherever you look around our shores, the number of boats sporting bowsprits, gaff rigs and tan or perhaps cream sails is on the increase. High visibility safety orange is now used for the body of the gale sail. Attach the gennaker halyard to the head of the sail. A new generation of simple sailing harken and jeanneau have introduced a collaborative effort to fundamentally improve cruising and shorthanded sailing. This is theoretically true, but involves balancing many factors according to conditions and performance goals.
Having said that, though, a new sailor will learn and benefit from reading hahnes book. Oct 30, 2001 one of the twopart gladstone performance racing series, this book discusses sail trim, boathandling, preparation and tuning. The book focuses more on the needs of the cruising sailor as opposed to the out and out racer. Using sensorguided, pushbutton sail control, the new system makes cruising more relaxing for families, shorthanded crews, and solo sailors, and also lets those. Trim sails definition of trim sails by the free dictionary. It provides coverage of cargo ships and passenger ships, tugs, dredgers and other service craft.
Aggressive trimming is required to keep up as the boat builds speed, and an equally aggressive ease is needed to prevent a stall as the boat slows. Explanations are short, clear and simple, with useful illustrations. Maximum sail power vii endorsements brian hancock does a beautiful job blending the art and science of sail technology. North sails trim for speed awesome trim video from north sails with tom whidden, tom mclaughlin, gary weismann and hans fogh 5. The most valuable piece of information isnt the shape of the sail at the ideal trim, but rather what hap. Uniquely illustrated nautical manuals sail trim rig trim.
This was one of the first books i read about sail trim and i nearly gave up the sport on the spot. Spinnaker trim for speed sailing by mike toppa and gary jobson mike toppa runs the north sails loft in clearwater, florida. Trim your main properly so the boat sails more efficiently and provides the crew with a comfortable ride. Get the critical increment of fast at a north u trim webinar. Attach the gennaker sheets to the clew of the sail. The rya sail trim handbook for cruisers is an allnew title and is crammed with useful tips and pointers on one of the fundamentals of good seamanship. A sail s luff should face directly into the wind so that air streams evenly on both sides. North u sail trim seminars american sailing association. Fantastic computer graphics systematically explain how to tuneyouryacht, keelboat or dinghy. Conglomerating clippings from the magazine produced a very uneven book, sometimes conflicting, and frequently pitched to people of widely different experience. Run the dowsing line through the retrieval points on the sail. The rya sail trim book is an all new title and is crammed with useful tips and pointers on one of the fundamentals of good seamanship. By tom whidden one of the goals for our book, the art and science of sails, is to connect the theoretical with the practical.
Here are three reasons you should be twisting out the sail towards the top of the mast get rid of excessive heeling. It covers foresails, the mainsail, and spinnakers, and always describes the whys, not just the whattodos. How to rig and fly a gennaker nathan ilten sailing. This is the line attached to the leeward lower corner clew of the spinnaker, used in conjunction with the afterguy or guy, used to trim the spinnaker angle to the wind. When the wind direction changes, or when you change the heading of the boat, you should readjust the sail to compensate. When a single sail is used the air flow over the sail is not even, turbulence and eddies being formed on the leeward side of the sail of the sail which tends to reduce the venturi effect and consequent lift. A number of controls are at hand for getting sails flying right. The difference between books on sail trim and theory really comes down to the graphics used to help in explanation. Practical ship design records these changes, their outcomes and the reasoning behind them. Sail trim and rig tuning made easy, both for experts and novices. Given the rapid acceleration of sport boats, the apparent wind angle is changing all the time.
Dont be afraid to let the sail out until its against the shrouds and spreaders just make sure the boom vang is on tight enough. Everyday low prices and free delivery on eligible orders. Sail trim and balance lecture from singles on sailboats spring training. Spinnaker trim for speed sailing by mike toppa and gary jobson. Second, the mainsheet controls the angle of attack the sails angle to the wind. Apr 27, 2016 ease until the sail begins to luff bubble or backwind along its leading edge then trim just enough to stop luffing. Match the wind at the top of the sail to the wind gradient. We built a simple and concise request form to help you think through your needs, and help us make the best possible recommendation for you. The following measurements and sail trim tips are what we have found to be the fastest for setting up your new dieball sailing sails. North sails has a wealth of information that we want to share with you.
Basic trim is achieved by simply easing the sail until it luffs, and. Almost wherever you look around our shores, the number of boats sporting bowsprits, gaff rigs and tan or perhaps cream sails is on the. Sail trim and balance fundamental linkedin slideshare. We describes sails in this ideal state as on the verge of luffing. Mainsail trim pointers, reefing and sail care for the beneteau oceanis series the following points on mainsail trim apply both to the furling and classic mainsails we produce for beneteau usa and the oceanis line of boats. To make neat or tidy by clipping, smoothing, or pruning.
Sail trim theory 101 mains, jibs and rigs created for mcsc by nicholas hayes, team syrena, us 46409 the simple rules of telltales. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. But before we ask you some questions, if you have a small boat under 22 feet you might try our search products box at the top of this. Whether it is tips on getting around the racecourse, trimming your sails or cruising techniques we aim to document our knowledge to help improve your sailing. Cruising spinnakers are remarkable sails for their ability to change shape to match your course and wind angle. This beautifully illustrated and wellorganised book shows the reader step by step, how to trim their sails and rig for maximum performance. Brian makes it understandable for the club sailor, cruiser, and the racing expert. Here we list five great books for those of you keen to improve your sail trim and how to be first back to the marina every time. Expert sailors alter and experiment with their sail s trim almost continuously.