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The smaller the angle between the direction of the true wind and the course of the sailing craft, the higher the craft is said to point. A craft that can point higher or sail faster upwind is said to be more weatherly. [11] Pinching occurs as a craft's point of sail approaches the no-go zone and its speed falls off sharply. [4]
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.
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 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]
The Canadian Forces Maritime Experimental and Test Ranges (CFMETR) is a maritime test facility on the east [1] side of Vancouver Island, at Nanoose Bay. The main gate of CFMETR Nanoose Bay CFMETR docks from across Nanoose Bay. The craft shown, from left to right, are two Canadian Maritime Command TSRVs and one U.S. Navy YTT.
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] Previously, the highest speed ever reported was from the crew of l'Hydroptère. During an attempt on 21 December 2008 at Port-Saint-Louis-du-Rhône, they recorded a top speed of ...
A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom. Several lines are normally ...
6 Confusion about sail trim vs. point of sail. 6 comments. 7 Inferences on studding sails. 21 comments ...