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All sailing craft reach a constant forward speed (V B) for a given wind speed (V T) and point of sail, when the forward driving force (F R) equals the forward resisting force (R l). [8] For an ice boat, the dominant forward resisting force is aerodynamic, since the coefficient of friction on smooth ice is as low as 0.02.
The point of sail between beating and a beam reach is called a close reach. At 135° off the wind, a craft is on a broad reach. At 180° off the wind (sailing in the same direction as the wind), a craft is running downwind. [1] A given point of sail (beating, close reach, beam reach, broad reach, and running downwind) is defined in reference to ...
Velocity made good, or VMG, is a term used in sailing, especially in yacht racing, indicating the speed of a sailboat towards (or from) the direction of the wind. [1] [2] The concept is useful because a sailboat cannot sail directly upwind, and thus often can not, or should not, sail directly to a mark to reach it as quickly as possible.
In sailboat racing, and especially in speed sailing, apparent wind is a vital factor, when determining the points of sail a sailboat can effectively travel in. A vessel traveling at increasing speed relative to the prevailing wind will encounter the wind driving the sail at a decreasing angle and increasing velocity.
The idea of an instantaneous speed record is not officially sanctioned by the WSSRC and is, therefore, not officially measured or documented. The highest speed ever reported is from the crew of Vestas Sailrocket 2 : on 24 November 2012 they recorded a top speed of 68.33 knots in a 25–29-knot wind. [13]
In 2009, hydrofoil trimaran, Hydroptère, set the world speed sailing record on water at 50.17 knots (92.9 km/h), sailing at about 1.7 times the speed of the wind. [17] [18] In late 2012, Vestas Sailrocket 2 achieved a new outright world speed record of 65.45 knots (121.2 km/h) on water, at around 2.5 times the speed of the wind. [19]
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All sailing craft reach a constant forward velocity (V B) for a given true wind velocity (V T) and point of sail. The craft's point of sail affects its velocity for a given true wind velocity. Conventional sailing craft cannot derive power from the wind in a "no-go" zone that is approximately 40° to 50° away from the true wind, depending on ...
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