Question

requirements of wind vane
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Answer 1

Wind direction is measured in degrees from true north. The word ‘vane’ comes from the Anglo-Saxon word ‘fane’ meaning ‘flag’ [3, 5]. The wind direction is determined by the direction from which it blows. It is a westerly wind if the air current blows from the West.The wind vane, used for indicating wind direction, is one of the oldest meteorological instruments. When mounted on an elevated shaft or spire, the vane rotates under the influence of the wind such that its center of pressure rotates to leeward and the vane points into the wind.

Modern aerovanes combine the directional vane with anemometer. Colocating both instruments allows them to use the same axis and provides a coordinated The main purpose of a weather vane is to help assess the weather. Meteorologists then use these measurements to predict weather patterns. Knowing which direction as well as speed and pressure the wind is coming from can help weather forecasters predict when storm patterns and heat waves will arrive at a city or county.