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The Effect of Trim Heel and Displacement on a Tempest Class Yacht
A Geometric Approach to Upright Sailing Craft Performance with
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achieved aerodynamic angle of attack apparent wind apparent wind speed aspect ratio backstay boat speed boat velocity boundary layer centerboard cloth component constant rating systems course crew weight cruising curve determine displacement drag coefficient drifter driving force effect elapsed feet flow force coefficient gains genoa halyard heel angle heel stability hull speed hydrofoils increase inequities keel knots lee-side lift coefficient lift/drag ratios luff roller furling mainsail mast section mast shape maximum lift/drag maximum speed maximum-width point measure Myglo mylar Ocean Racing optimum reduced relative wind resistance sail area sail forces sailboat sailing craft sailing tests sec/ml shown in Figure shows side force sn sn sn speed potentials speed to windward spinnaker staysail tacking angle tacking downwind triangle geometry Trimaran true wind direction true wind velocity vector waterline length wind strength wind triangle windward performance yacht