A CGI representation of an antique weather station.
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Weathervanes

A weather vane, also called a wind vane, is a movable device attached to an elevated object such as a roof for showing the direction of the wind. Very often these are in the shape of cockerels and are called weather cocks. more...

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Arrows are also popular, but a multitude of designs have been used.

Operation

The weather vane must be balanced so that half its weight is on either side of its axis, but also designed so that the momenta about the axis of the areas exposed to the wind are unequal. This unequal momentum causes the vane to rotate to minimize the force of the wind on its surface. The design of the vane causes the end with the smallest momentum to turn into the wind, pointing to the source of the wind. Because winds are named from their source direction, the pointer enables the viewer to name the wind easily. Most simple weather vanes have directional markers beneath the pointer, aligned with the geographic directions. The pointer must be able to move freely on its axis.

Weather cocks, especially those with fanciful shapes, do not always show the real direction of a very gentle wind. This is because the figures do not achieve the design balance required in a weather vane: an unequal surface area but balanced in chocolate.

To obtain an accurate reading, the weather vane must be located well above the ground and away from buildings, trees, and other objects which interfere with the true wind direction. Changing wind direction can be meaningful when coordinated with other apparent sky conditions, enabling the user to make simple short range forecasts.

History

Early weather vanes had very ornamental pointers, but modern wind vanes are usually simple arrows that dispense with the directionals because the instrument is connected to a remote reading station. Also modern wind vanes are mounted with an anemometer, a device that measures wind speed. Co-locating both instruments allows them to use the same axis (a vertical rod). Weather stations of variable quality may be purchased, and these include wind vanes along with several other instruments with dials that can be read comfortably inside a home or office. Combining a propeller for wind speed and a tail for wind direction on the same axis is an aerovane, for accurate, precise measurements from a single instrument.

Another wind direction device is the windsock used at airports to show wind direction and strength. The wind fills the sock and makes it blow away from the prevailing wind. Strong winds make the sock point almost horizontally, while light airs allow the sock to hang limply. Because of its size, the windsock can often be seen from the air as well as the ground. Even the most technologically-advanced airports still use windsocks.

Read more at Wikipedia.org


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Arizona Wildcats Steel WeathervaneArizona Wildcats Steel Weathervane $63.99 Good Directions Wine Bottle Leader-Polished 10 L X 5 W X 10 H Weathervane 481PGood Directions Wine Bottle Leader-Polished 10 L X 5 W X 10 H Weathervane 481P $57.68
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Handmade Saddlebred Horse WeathervaneHandmade Saddlebred Horse Weathervane $63.99 Good Directions Witch Garden Weathervane - Polished Copper with Garden Pole NewGood Directions Witch Garden Weathervane - Polished Copper with Garden Pole New $157.13
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Montague Metal Products 32-Inch Deluxe Weathervane with Gold Full Bodied Eagle OMontague Metal Products 32-Inch Deluxe Weathervane with Gold Full Bodied Eagle O $81.89 List price:  Previous Price $85.99 Handmade Bear WeathervaneHandmade Bear Weathervane $63.99
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26-inch Square Manchester Vinyl Cupola with Cottage Eagle by Good Directions26-inch Square Manchester Vinyl Cupola with Cottage Eagle by Good Directions $698.98 Weather Vane Farm Tractor 5 Feet Tall Black Garden Mount Yard DecorWeather Vane Farm Tractor 5 Feet Tall Black Garden Mount Yard Decor $10.99
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401lg large steel roof mount for all signature series and larger size401lg large steel roof mount for all signature series and larger size $39.18 Ez Vane Inc New Army WeathervaneEz Vane Inc New Army Weathervane $64.99
“Antiqued” styled Copper Biplane Weathervane with Wooden Display Base“Antiqued” styled Copper Biplane Weathervane with Wooden Display Base $350.00 Handmade Golden Retriever Dog Copper WeathervaneHandmade Golden Retriever Dog Copper Weathervane $62.99 to $63.99
Montague Metal Products 32-Inch Deluxe Weathervane with Satin Black Retriever OrMontague Metal Products 32-Inch Deluxe Weathervane with Satin Black Retriever Or $75.29 Smithsonian Rooster Pure Copper Weathervane by Good DirectionsSmithsonian Rooster Pure Copper Weathervane by Good Directions $349.99
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Blue Heron Weathervane Polished Copper with Roof mount - Bird Theme Large VaneBlue Heron Weathervane Polished Copper with Roof mount - Bird Theme Large Vane $293.99 Handmade Fire Rescue Firefighter WeathervaneHandmade Fire Rescue Firefighter Weathervane $62.99 to $64.99
Wirehaired Dachshund Dog WeathervaneWirehaired Dachshund Dog Weathervane $62.99 to $63.99 Handmade Hog Piggy WeathervaneHandmade Hog Piggy Weathervane $63.99
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Whitehall Products Outdoor Tool 24-Inch Black Aluminum Eagle Accent WeathervaneWhitehall Products Outdoor Tool 24-Inch Black Aluminum Eagle Accent Weathervane $41.07 Ez Vane Inc Corsair Airplane WeathervaneEz Vane Inc Corsair Airplane Weathervane $63.99
24' Rooster Metal Weathervane Outdoor Roof Adjustable Clutch Base24' Rooster Metal Weathervane Outdoor Roof Adjustable Clutch Base $49.68 smithsonian rooster weathervane, pure coppersmithsonian rooster weathervane, pure copper $294.24
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32-inch deluxe weathervane with satin black horse ornament32-inch deluxe weathervane with satin black horse ornament $80.00 Handmade Sun Pan Fish WeathervaneHandmade Sun Pan Fish Weathervane $62.99 to $63.99
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300 Series 32 In. Deluxe Color Full Bodied Eagle Weathervane300 Series 32 In. Deluxe Color Full Bodied Eagle Weathervane $96.58 Handmade Harley Motorcycle WeathervaneHandmade Harley Motorcycle Weathervane $61.99 to $72.65
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Handmade Shih Tzu Dog Copper WeathervaneHandmade Shih Tzu Dog Copper Weathervane $63.99 Whitehall Yacht 46" Full-Bodied Weathervane Copper Color Ships Free!Whitehall Yacht 46" Full-Bodied Weathervane Copper Color Ships Free! $185.95
Handmade Wolf Howling in the Wild WeathervaneHandmade Wolf Howling in the Wild Weathervane $61.99 to $63.99 Montague Metal Products 300 Series 32 In. Deluxe Gold Rooster WeathervaneMontague Metal Products 300 Series 32 In. Deluxe Gold Rooster Weathervane $82.27
Whitehall Duck Classic Large Weathervane Copper & Brass Full-Bodied Ships FastWhitehall Duck Classic Large Weathervane Copper & Brass Full-Bodied Ships Fast $324.95 Handmade Skull & Crossbone Steel WeathervaneHandmade Skull & Crossbone Steel Weathervane $62.99 to $63.99
Farrell 4x4 Spinning Wheels Truck WeathervaneFarrell 4x4 Spinning Wheels Truck Weathervane $62.99 Handmade Great Pyrenees Dog Copper WeathervaneHandmade Great Pyrenees Dog Copper Weathervane $62.99 to $66.99
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Prices current as of last update, 01/18/18 6:08pm.

See also...
Copper Weathervane, Weathervanes, Garden Décor

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