About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 63. Chapters: Sail, Forces on sails, Rudder, Spinnaker, Sailcloth, Deck, Keel, Boom, Skeg, Canting keel, Tiller, Mast, Figurehead, Ballast tank, Roller furling, Bowsprit, Centreboard, Fife rail, Ama, Jib, Marine canvas, Bilge, Boom vang, Aka, Winged keel, Transom, Daggerboard, Cathead, Jackline, Ship's wheel, Bulb keel, Gunwale, Dolphin striker, Beitass, Gaff vang, Beakhead, Vaka, Scupper, Unstayed mast, Hawser, Cockpit, Quarter gallery, Brail, Bilgeboard, Trailboard, Hawsehole, Cringle, Wingsail, Bunt, Carling, Taffrail, Aftcastle, Steering oar, Bumpkin, Martingale, Trampoline, Butt, Pelican striker. Excerpt: The purpose of sails is to use wind energy to move the vessel, sled, board, vehicle or rotor. The effects of wind create force on all surfaces of the sails. Understanding the forces on sails is important for the design and operation of the sails and whatever they are moving, especially vessels in regards stability and speed. To do this, we need to calculate: The calculations are complex. For a boat they are much more complex than for a rigid winged aircraft. The theory of air flow effects on sails is part of fluid mechanics and aerodynamics. Structural analysis also is involved in modern optimal sail design and manufacture. Aeroelasticity models, combining computational fluid dynamics and structural analysis, are at the forefront of sail study and design. However, understanding of turbulence and detachment of the boundary layer are not yet fully mastered. Computational limitations persist. The theoretical results are nevertheless corrected by reality. So, wind tunnel and full scale testing of sails are required for optimum understanding of sail function, design and trim. Some complexities of sails: Though software algorithms consider these parameters, for clarity and simplicity it is useful ( though not necessarily prudent, ...
