When matching the mast bend to suit the mainsail you are aiming for the luff of the mainsail to follow the bend evenly at approximately 1 15mm away from the back edge of the mast if you tie your sail ties leave a gap between mast and sail of approx 2mm this will aid setting the bend correctly. With a revolutionary approach to sail and rig tuning this book tackles the practical and realistic elements of tuning your boat as well as the theory of sail aerodynamics the book covers the many variations in boat sail and rig design it has become the bible on tuning this book is different. Sail and rig tuning by ivar dedekam goodreads this book does an outstanding job of condensing the rather large topic of sail trim and rig tuning into one concise illustrated book it covers foresails the mainsail and spinnakers and always describes the whys not. Book description the best illustrated manual ever on tuning the sails and rigs of a yacht or small keelboat features 152 color diagrams and a brilliantly concise text separate sections offer a logical approach to the topics of trimming the genoa and mainsail trimming spinnakers and gennakers and setting up masts read more product details item weight 82 ounces isbn 10 1898660670 . Sail and rig tuning introduction it is important but not necessary to have a correctly tuned rig boats which have badly tuned rigs are slower point lower heel more make more leeway and may be harder to steer rig types the bermudan style rig can be divided into two main groups masthead rig where the backstay and forestay are attached at the masthead fractional rig swift 18 backstay is
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