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- Q2247775 subject Q6291755.
- Q2247775 subject Q8608488.
- Q2247775 abstract "Sailing faster than the wind is the technique by which vehicles that are powered by sails (such as sailboats, iceboats and sand yachts) advance over the surface on which they travel faster than the wind that powers them. Such devices cannot do this when sailing dead downwind using simple square sails that are set perpendicular to the wind, but they can achieve speeds greater than wind speed by setting sails at an angle to the wind and by using the lateral resistance of the surface on which they sail (for example the water or the ice) to maintain a course at some other angle to the wind.In 2013, a new class of catamaran was announced for the America's Cup which can achieve well in excess of double the speed of the wind. The Extreme 40 catamaran can sail at 35 knots (65 km/h; 40 mph) in 20–25-knot (37–46 km/h; 23–29 mph) winds. The high-performance International C-Class Catamaran can sail at twice the speed of the wind. Iceboats can typically sail at five times the speed of the wind. By sailing downwind at 135 degrees off the wind, a sand yacht can sail much faster than the wind. The velocity made good downwind is often over twice as fast compared to the same land yacht sailing directly downwind. The catamarans used for the 2013 America's Cup were expected to sail upwind at 1.2 times the speed of the true wind, and downwind at 1.6 times the speed of the true wind. They proved to be faster, averaging about 1.8 times the speed of the wind with peaks slightly over 2.0.In 2009, the world speed sailing record on water was set by a hydrofoil trimaran sailing at 1.71 times the speed of the wind. Also in 2009, the world land speed record for a wind-powered vehicle was set by the sand yacht Greenbird sailing at about three times the speed of the wind. In late 2012 the Vestas Sailrocket 2 skippered by Paul Larsen achieved a new outright world speed record of 65.45 knots on water, at around 2.5 times the speed of the wind.".
- Q2247775 thumbnail Wiki_sailing_vector_135_degrees.png?width=300.
- Q2247775 wikiPageExternalLink www.sailspeedrecords.com.
- Q2247775 wikiPageExternalLink www.iceboat.org.
- Q2247775 wikiPageExternalLink www.nalsa.org.
- Q2247775 wikiPageExternalLink CourseTheorem.htm.
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- Q2247775 wikiPageWikiLink Q6291755.
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- Q2247775 comment "Sailing faster than the wind is the technique by which vehicles that are powered by sails (such as sailboats, iceboats and sand yachts) advance over the surface on which they travel faster than the wind that powers them.".
- Q2247775 label "Sailing faster than the wind".
- Q2247775 depiction Wiki_sailing_vector_135_degrees.png.