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How SAiLS WORk
Selecting appropriate sail
Basic sail design
1 other sections not shown
aerodynamic apparent wind backwinding batten Bernoulli's principle boat's boom boundary layer broadseaming camber camber and camber camber distribution causes Chapter chord length clew crimp cruising spinnaker cutters deck depth/chord ratio diagram downwash draft aft effect entry angle extrusion fabric Figure flat flatter fluid flying shape foot forestay furling sails genoa girth halyard head headsail headstay sag height horizontal increase induced drag laminates lead angle leading edge leech tension leeward side less lift/drag ratio lifting force loads lofts low pressure luff luff curve luff tape mainsail mast bend maximum depth location modern Mylar nylon panels percent aft pole polyester racing boats resin resistance result roach sail area sail camber sail design sail shape sail trim sailboats sailcloth sailing rig sailmakers Sailor's Guide sailors seam sheet lead slab reefing sloops spar spinnaker cloth staysail surface tack techniques telltales threadline three-dimensional tion twist upwash upwind vertical warp weave windward yarns