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eBlue_economy_Windsock an indicator of wind speed and direction
eBlue_economy_Windsock an indicator of wind speed and direction

Windsock an indicator of wind speed and direction

Windsock (also called a wind cone) is a conical textile tube that resembles a giant sock. It can be used as a basic indicator of wind speed and direction, or as decoration. Denis Hains Hydrospatial Advocate  posted via his group on LinkedIn

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They are typically used at airports to show the direction and strength of the wind to pilots and at chemical plants where there is a risk of gaseous leakage. They are also sometimes located alongside highways at windy locations.

Wind direction is the opposite of the direction in which the windsock is pointing, so a windsock pointing due north indicates a southerly wind. Wind speed is indicated by the windsock’s angle relative to the mounting pole; in low winds, the windsock droops; in high winds, it flies horizontally.

Alternating stripes of high visibility orange and white were initially used to help to estimate the speed of the wind. Each stripe adds up to 3 knots to the estimated wind speed.

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However, some circle frames mountings cause windsocks to be held open at one end, indicating a velocity of 3 knots, even though anemometers would show no wind speed. A fully extended windsock suggests a wind speed of 15 knots (28 km/h; 17 mph) or greater.

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