weather vane


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weather vane

or

wind vane,

instrument used to indicate wind direction. It consists of an asymmetrically shaped object, e.g., an arrow or a rooster, mounted at its center of gravity so it can move freely about a vertical axis. Regardless of the design, the portion of the object with greater surface area (usually the tail) offers greater resistance to the wind and thus positions the vane so that the forward part points in the direction from which the wind is blowing. The compass direction of the wind may then be determined by reference to an attached compass rose; alternatively, the orientation of the vane may be relayed to a remote calibrated dial. The wind vane must be mounted at a distance from the nearest obstacle equal to at least twice the height of the obstacle above the vane if the observed wind direction is to be representative of meteorologically significant wind patterns; for this reason, the vane is often mounted on a pole or tower that is in turn mounted on the roof of a tall building.

weather vane

A metal plate, often decorated, or in the shape of a figure or object, which rotates freely on a vertical spindle to indicate wind direction; usually located atop a spire or other elevated position on a building.

weather vane

weather vane
A device that shows the direction the wind is blowing.

weather vane

a vane designed to indicate the direction in which the wind is blowing
References in periodicals archive ?
In honour of Gough's intervention, which is recorded on the plaque over the main entrance, the weather vane was designed to incorporate a boar's head, a reference to the Gough's family crest.
In 1787, George Washington designed and commissioned his famous weather vane from a craftsman in Philadelphia where he was presiding over the Constitutional Convention.
a manufacturer with an electric product mix ranging from lightning rods and weather vanes to small passenger buses, recreational vehicles and van conversions.
The weather vane on top of the hall was removed during repairs to the roof and is now set to go under the hammer.
As the aircraft sector is an important support and weather vane of the global economy, ICBC and ICBC Leasing will continue to provide aircraft leasing services.
A TILTING weather vane which caused the evacuation of city centre buildings was finally taken down yesterday.
LANCASTER - Eighteen months of restoration work on the First Church's bell and clock tower culminated yesterday with a topping off ceremony - the replacing of the original 1816 weather vane, newly gilded, glinting in the late afternoon sunlight.
Which London sporting venue has a weather vane depicting Old Father Time?
Think of the dunes sort of like a weather vane, pointing us to the direction the winds are blowing," he added.
Football, the faithful, often stark weather vane of real life in Northern Ireland, told us as much this summer.
He paints the winning colours on the jockey and horse which are part of the weather vane atop the infield structure.
On the previous page, you will find a compass pattern and on page 31, a pattern for a weather vane arrow.