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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Vintage Whale Copper Weathervane, 24" long, includes post, directions, and ballsVintage Whale Copper Weathervane, 24" long, includes post, directions, and balls $175.00 Copper loon and chick swimming weathervane, All Parts,sold as shown. No mountCopper loon and chick swimming weathervane, All Parts,sold as shown. No mount $395.00
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Whitehall 24" Cow Weathervane Black with Rooftop Mount Ships Fast!Whitehall 24" Cow Weathervane Black with Rooftop Mount Ships Fast! $47.95 Whitehall Witch Flying Garden Weathervane Black - Includes MountWhitehall Witch Flying Garden Weathervane Black - Includes Mount $84.95
Dog - Beagle Weathervane - Hound - Weather Vane - Complete w/ Choice of MountDog - Beagle Weathervane - Hound - Weather Vane - Complete w/ Choice of Mount $63.95 Mount Vernon Dove Of Peace WeathervaneMount Vernon Dove Of Peace Weathervane $90.00
Bull Copper weathervane, Quality Weathervane Parts,sold as shown.Bull Copper weathervane, Quality Weathervane Parts,sold as shown. $545.00 Vintage 1974 Whitehall 24″ Country Doctor WeathervaneVintage 1974 Whitehall 24″ Country Doctor Weathervane $7.00
Eagle Wind Speed and Weather Vane 5 Feet Tall Garden Yard DecorEagle Wind Speed and Weather Vane 5 Feet Tall Garden Yard Decor $23.96 Edm - Weather Vane Farm Tractor 5 Feet Tall Black Garden Mount Yard DécorEdm - Weather Vane Farm Tractor 5 Feet Tall Black Garden Mount Yard Décor $12.99
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Good Directions Brass and Copper Sailboat Cottage Weathervane - 8803P Roof Mount00006000 Good Directions Brass and Copper Sailboat Cottage Weathervane - 8803P Roof Mount $85.00 Dog - Poodle Weathervane - Weather Vane - Complete w/Choice of MountDog - Poodle Weathervane - Weather Vane - Complete w/Choice of Mount $63.95
Rabbits, Rabbit Weathervane - Bunnies, Bunney, Bunny Vane w/ Choice of MountRabbits, Rabbit Weathervane - Bunnies, Bunney, Bunny Vane w/ Choice of Mount $63.95 Weather Vane German Shepherd Heavy Duty Cast Aluminum Painted Complete Set BarnWeather Vane German Shepherd Heavy Duty Cast Aluminum Painted Complete Set Barn $159.90
black crow weathervane black wrought iron look made in usa roof mount Tls1048Rmblack crow weathervane black wrought iron look made in usa roof mount Tls1048Rm $24.99 Swen Products Northern State Wolves Steel WeathervaneSwen Products Northern State Wolves Steel Weathervane $47.95 to $54.45
Jumping or Leaping Deer Weathervane Whitetail? Mule? Buck with Choice of MountJumping or Leaping Deer Weathervane Whitetail? Mule? Buck with Choice of Mount $63.95 Good Directions Copper Bits & Pieces Rainchain 4 Pails - Handyman ProjectGood Directions Copper Bits & Pieces Rainchain 4 Pails - Handyman Project $25.00
Dog - Chihuahua Weathervane Weathervane - Complete w/ Choice of MountDog - Chihuahua Weathervane Weathervane - Complete w/ Choice of Mount $63.95 Handmade Rust Sailboat Cottage Weathervane Ornament Crafts Weather Vane UsHandmade Rust Sailboat Cottage Weathervane Ornament Crafts Weather Vane Us $11.50
48'' tall Quality made unique octagonal copper eagle turret cap 37''wingspan48'' tall Quality made unique octagonal copper eagle turret cap 37''wingspan $2,862.95 Rooster Weather Vane chicken farm barn hen weathervane Robbins Lightning 27"Rooster Weather Vane chicken farm barn hen weathervane Robbins Lightning 27" $99.95
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Xlarge Handcrafted 3Dimensional Poodle Dog Weathervane Copper PatinaXlarge Handcrafted 3Dimensional Poodle Dog Weathervane Copper Patina $149.99 24'' Copper Weathervane replacement arrow.Sold As Shown24'' Copper Weathervane replacement arrow.Sold As Shown $69.00
New Good Directions 403C Garden Weathervane Garden Pole Free ShippingNew Good Directions 403C Garden Weathervane Garden Pole Free Shipping $43.23 Good Directions Polished Copper Hanging Wall Sculpture 25" Rooster WeathervaneGood Directions Polished Copper Hanging Wall Sculpture 25" Rooster Weathervane $85.00
Fire Department Shield Vector, Fd, Firefighter Badge Weathervane Vane with MountFire Department Shield Vector, Fd, Firefighter Badge Weathervane Vane with Mount $63.95 Hand Crafted Weathervane Windy Day Girl Umbrella Green Outdoor 19" Heavy SteelHand Crafted Weathervane Windy Day Girl Umbrella Green Outdoor 19" Heavy Steel $85.45 Was:  Previous Price $89.95
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Early American Pony Horse Stallion Wind Mill Weather Vane Top Copper + SteelEarly American Pony Horse Stallion Wind Mill Weather Vane Top Copper + Steel $31.19 Was:  Previous Price $38.99 Farm Tractor Weather Vane 5 Feet Tall Garden Yard DecorFarm Tractor Weather Vane 5 Feet Tall Garden Yard Decor $23.24
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Rooster Weathervane (Roof Mounting Included)Rooster Weathervane (Roof Mounting Included) $59.99 Dragon Weathervane (Garden Mounting Pole Included)Dragon Weathervane (Garden Mounting Pole Included) $59.99
Aeronca Champ Weathervane handmade one of a kind.Aeronca Champ Weathervane handmade one of a kind. $200.00 Vintage Aluminum Weather Vane Horse & Buggy Used 17 1/2"Vintage Aluminum Weather Vane Horse & Buggy Used 17 1/2" $15.00
3 Dimensional Cast Aluminum Pheasant Topper For Weather Vane3 Dimensional Cast Aluminum Pheasant Topper For Weather Vane $6.99 Large 3D Garden Fairy Copper weathervane, As Shown.No Roof Mount.Large 3D Garden Fairy Copper weathervane, As Shown.No Roof Mount. $775.00
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Swen Products Texas A&M Aggies Steel WeathervaneSwen Products Texas A&M Aggies Steel Weathervane $47.95 to $54.45 Imported Roof Mount- Extra SmallImported Roof Mount- Extra Small $23.60
Montague Metal Products Cast Bell with Black Mare and ColtMontague Metal Products Cast Bell with Black Mare and Colt $38.87 Was:  Previous Price $43.19 Weathervane rooster Copper and brass Patina green Finish NewWeathervane rooster Copper and brass Patina green Finish New $120.00
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Prices current as of last update, 09/21/20 2:14am.

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

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