Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Forces_on_sails> ?p ?o }
- Forces_on_sails abstract "Forces on sails result from movement of air that interacts with sails and gives them motive power for sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and sail-powered land vehicles. Similar principles in a rotating frame of reference apply to wind mill sails and wind turbine blades, which are also wind-driven. They are differentiated from forces on wings, and propellor blades, the actions of which are not adjusted to the wind. Kites also power sailing craft, but do not employ a mast to support the airfoil and are beyond the scope of this article.Forces on sails depend on wind speed and direction and the speed and direction of the craft. The direction that the craft is traveling with respect to the "true wind" (the wind direction and speed over the surface) is called the point of sail. The speed of the craft at a given point of sail contributes to the "apparent wind"—the wind speed and direction as measured on the moving craft. The apparent wind on the sail creates a total aerodynamic force, which may be resolved into drag—the force component in the direction of the apparent wind—and lift—the force component normal (90°) to the apparent wind. Depending on the alignment of the sail with the apparent wind, lift or drag may be the predominant propulsive component.For apparent wind angles aligned with the entry point of the sail, the sail acts as an airfoil and lift is the predominant component of propulsion. For apparent wind angles behind the sail, drag is the predominant component of propulsion. For a given apparent wind speed, a sail can generate a higher lift force, when aligned with the apparent wind, than it can drag force with a following apparent wind. Because of limitations on speed through the water, displacement sailboats generally derive power from sails generating lift on points of sail that include close-hauled through broad reach (approximately 40° to 135° off the wind). Because of low friction over the surface and high speeds over the ice that create high apparent wind speeds for most points of sail, iceboats can derive power from lift further off the wind than displacement boats.Various mathematical models address lift and drag by taking into account the density of air, coefficients of lift and drag that result from the shape and area of the sail, and the speed and direction of the apparent wind, among other factors. This knowledge is applied to the design of sails in such a manner that sailors can adjust sails to the strength and direction of the apparent wind in order to provide motive power to sailing craft.".
- Forces_on_sails thumbnail Points_of_sail--close-hauled_(right)_and_down_wind_(left).jpg?width=300.
- Forces_on_sails wikiPageID "27739767".
- Forces_on_sails wikiPageLength "68881".
- Forces_on_sails wikiPageOutDegree "163".
- Forces_on_sails wikiPageRevisionID "683183476".
- Forces_on_sails wikiPageWikiLink 2013_Americas_Cup.
- Forces_on_sails wikiPageWikiLink AC72.
- Forces_on_sails wikiPageWikiLink Aerodynamic_force.
- Forces_on_sails wikiPageWikiLink Aerodynamics.
- Forces_on_sails wikiPageWikiLink Aeroelasticity.
- Forces_on_sails wikiPageWikiLink Aerofoil.
- Forces_on_sails wikiPageWikiLink Airfoil.
- Forces_on_sails wikiPageWikiLink Angle_of_attack.
- Forces_on_sails wikiPageWikiLink Apparent_wind.
- Forces_on_sails wikiPageWikiLink Aspect_ratio.
- Forces_on_sails wikiPageWikiLink Atmospheric_pressure.
- Forces_on_sails wikiPageWikiLink Batten.
- Forces_on_sails wikiPageWikiLink Battens.
- Forces_on_sails wikiPageWikiLink Boldface.
- Forces_on_sails wikiPageWikiLink Boundary_layer.
- Forces_on_sails wikiPageWikiLink Broach_(sailing).
- Forces_on_sails wikiPageWikiLink Broaching_(sailing).
- Forces_on_sails wikiPageWikiLink Camber_(aerodynamics).
- Forces_on_sails wikiPageWikiLink Category:Aerodynamics.
- Forces_on_sails wikiPageWikiLink Category:Marine_propulsion.
- Forces_on_sails wikiPageWikiLink Category:Naval_architecture.
- Forces_on_sails wikiPageWikiLink Category:Sailing.
- Forces_on_sails wikiPageWikiLink Center_of_lateral_resistance.
- Forces_on_sails wikiPageWikiLink Center_of_pressure_(fluid_mechanics).
- Forces_on_sails wikiPageWikiLink Centerboard.
- Forces_on_sails wikiPageWikiLink Centreboard.
- Forces_on_sails wikiPageWikiLink Chord_(aeronautics).
- Forces_on_sails wikiPageWikiLink Chord_(aircraft).
- Forces_on_sails wikiPageWikiLink Coefficient_of_friction.
- Forces_on_sails wikiPageWikiLink Computational_fluid_dynamics.
- Forces_on_sails wikiPageWikiLink Degree_(angle).
- Forces_on_sails wikiPageWikiLink Draft_(sail).
- Forces_on_sails wikiPageWikiLink Drag_(physics).
- Forces_on_sails wikiPageWikiLink Drag_coefficient.
- Forces_on_sails wikiPageWikiLink Dynamic_pressure.
- Forces_on_sails wikiPageWikiLink Emphasis_(typography).
- Forces_on_sails wikiPageWikiLink Euclidean_vector.
- Forces_on_sails wikiPageWikiLink Euler_angle.
- Forces_on_sails wikiPageWikiLink Euler_angles.
- Forces_on_sails wikiPageWikiLink Extreme_40.
- Forces_on_sails wikiPageWikiLink File:Parts_of_a_sail.svg.
- Forces_on_sails wikiPageWikiLink Flow_separation.
- Forces_on_sails wikiPageWikiLink Fluid_mechanics.
- Forces_on_sails wikiPageWikiLink Force.
- Forces_on_sails wikiPageWikiLink Forces.
- Forces_on_sails wikiPageWikiLink Friction.
- Forces_on_sails wikiPageWikiLink Genoa_(sail).
- Forces_on_sails wikiPageWikiLink Glossary_of_nautical_terms.
- Forces_on_sails wikiPageWikiLink Gradient.
- Forces_on_sails wikiPageWikiLink Gustave_Eiffel.
- Forces_on_sails wikiPageWikiLink Halyard.
- Forces_on_sails wikiPageWikiLink Hull_speed.
- Forces_on_sails wikiPageWikiLink Ice_boat.
- Forces_on_sails wikiPageWikiLink International_C-Class_Catamaran.
- Forces_on_sails wikiPageWikiLink International_C-class_catamaran.
- Forces_on_sails wikiPageWikiLink International_DN.
- Forces_on_sails wikiPageWikiLink Italic_type.
- Forces_on_sails wikiPageWikiLink Italics.
- Forces_on_sails wikiPageWikiLink Jib.
- Forces_on_sails wikiPageWikiLink Keel.
- Forces_on_sails wikiPageWikiLink Kite_boarding_(disambiguation).
- Forces_on_sails wikiPageWikiLink Knot_(unit).
- Forces_on_sails wikiPageWikiLink Laminar_flow.
- Forces_on_sails wikiPageWikiLink Land_sailing.
- Forces_on_sails wikiPageWikiLink Leeway.
- Forces_on_sails wikiPageWikiLink Lift-induced_drag.
- Forces_on_sails wikiPageWikiLink Lift_(force).
- Forces_on_sails wikiPageWikiLink Lift_coefficient.
- Forces_on_sails wikiPageWikiLink Mainsail.
- Forces_on_sails wikiPageWikiLink Manometer.
- Forces_on_sails wikiPageWikiLink Moth_(dinghy).
- Forces_on_sails wikiPageWikiLink Multiview_orthographic_projection.
- Forces_on_sails wikiPageWikiLink Nautical_terminology.
- Forces_on_sails wikiPageWikiLink Newton_(unit).
- Forces_on_sails wikiPageWikiLink Normal_(geometry).
- Forces_on_sails wikiPageWikiLink Oswald_efficiency_number.
- Forces_on_sails wikiPageWikiLink Outhaul.
- Forces_on_sails wikiPageWikiLink Parasitic_drag.
- Forces_on_sails wikiPageWikiLink Parts_of_a_sail.
- Forces_on_sails wikiPageWikiLink Pitot_tube.
- Forces_on_sails wikiPageWikiLink Planform.
- Forces_on_sails wikiPageWikiLink Planing_(boat).
- Forces_on_sails wikiPageWikiLink Point_of_sail.
- Forces_on_sails wikiPageWikiLink Points_of_sail.
- Forces_on_sails wikiPageWikiLink Power_(physics).
- Forces_on_sails wikiPageWikiLink Power_law.
- Forces_on_sails wikiPageWikiLink Pressure.
- Forces_on_sails wikiPageWikiLink Pressure_coefficient.
- Forces_on_sails wikiPageWikiLink Pressure_measurement.
- Forces_on_sails wikiPageWikiLink Propeller.
- Forces_on_sails wikiPageWikiLink Propellor.
- Forces_on_sails wikiPageWikiLink Ratio.
- Forces_on_sails wikiPageWikiLink Rigging.
- Forces_on_sails wikiPageWikiLink Rolling_friction.