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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Coyote Howling at the Moon Weathervane Desert Vane w/ Choice of MountCoyote Howling at the Moon Weathervane Desert Vane w/ Choice of Mount $59.95 Good Directions Sherwood Cupola 26"es x 37"es Cypress Wood-Copper NewGood Directions Sherwood Cupola 26"es x 37"es Cypress Wood-Copper New $590.81
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Bear Weathervane - Grizzly? Black? Brown? Vane w/ Choice of MountBear Weathervane - Grizzly? Black? Brown? Vane w/ Choice of Mount $59.95 Good Directions Guilford Cupola 26"es x 41"es Cypress Wood-Copper NewGood Directions Guilford Cupola 26"es x 41"es Cypress Wood-Copper New $666.89
black crow weathervane black wrought iron look made in usa Tls1048Rmblack crow weathervane black wrought iron look made in usa Tls1048Rm $21.99 Landing Duck Pure Copper Weathervane by Good DirectionsLanding Duck Pure Copper Weathervane by Good Directions $296.49
Good Directions Kent Cupola 22"es x 27"es Cypress Wood NewGood Directions Kent Cupola 22"es x 27"es Cypress Wood New $266.69 Montague Metal Products Inc. Deluxe Tractor WeathervaneMontague Metal Products Inc. Deluxe Tractor Weathervane $66.99 to $77.99 List price: Previous Price $127.00
Good ions 585S Steel Weathervane Mount for Eaves Weathervanes, NewGood ions 585S Steel Weathervane Mount for Eaves Weathervanes, New $31.01 moose weathervane, pure coppermoose weathervane, pure copper $345.83
Table Top Zinc Horse WeathervaneTable Top Zinc Horse Weathervane $66.40 Good Directions Windsor Cupola 22"es x 32"es Vinyl-Copper NewGood Directions Windsor Cupola 22"es x 32"es Vinyl-Copper New $611.30
Galloping Horse Weathervane - Polished CopperGalloping Horse Weathervane - Polished Copper $165.43 Whitehall 12" Trumpet Vine Tube Bird Feeder French BronzeWhitehall 12" Trumpet Vine Tube Bird Feeder French Bronze $48.72
$67.00 American Eagle Weathervane - Vane - Bird - Bald - Complete w/ Choice of MountAmerican Eagle Weathervane - Vane - Bird - Bald - Complete w/ Choice of Mount $59.95
Adjustable Weathervane Roof Mount Aluminum Garden Weather Vane Standard SizeAdjustable Weathervane Roof Mount Aluminum Garden Weather Vane Standard Size $51.08 Good Directions Kent Cupola 14"es x 18"es NewGood Directions Kent Cupola 14"es x 18"es New $166.80
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Good Directions Cottage Rooster WeathervaneGood Directions Cottage Rooster Weathervane $128.49 to $138.49 Handmade Bowling WeathervaneHandmade Bowling Weathervane $63.99
smithsonian georgetown vinyl cupola with copper roof, 26" x 59"smithsonian georgetown vinyl cupola with copper roof, 26" x 59" $1,161.20 Whitehall Products Medallion Clock, Copper VerdiWhitehall Products Medallion Clock, Copper Verdi $76.00
Roof Mount Weathervane Landing Duck Pure Copper Weather Vane Wind DirectionsRoof Mount Weathervane Landing Duck Pure Copper Weather Vane Wind Directions $356.72 Whitehall Nautical Anchor Wall Décor - Bronze VerdigrisWhitehall Nautical Anchor Wall Décor - Bronze Verdigris $59.99
Bull Moose Weathervane - Wildlife Weather Vane with Choice of MountBull Moose Weathervane - Wildlife Weather Vane with Choice of Mount $59.95 Good Directions Sherwood Cupola 22"es x 30"es-2122Sv NewGood Directions Sherwood Cupola 22"es x 30"es-2122Sv New $599.77
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Whitehall Nuthatch Aluminum Suet Feeder 30052Whitehall Nuthatch Aluminum Suet Feeder 30052 $34.00 Bat And Moon Garden Weathervane - BlackBat And Moon Garden Weathervane - Black $49.99
Jumping Largemouth Bass Weathervane - Fishing, Fish Vane w/ Choice of MountJumping Largemouth Bass Weathervane - Fishing, Fish Vane w/ Choice of Mount $59.95 Whitehall 46" Eagle Weathervane - Gold-BronzeWhitehall 46" Eagle Weathervane - Gold-Bronze $196.98
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Quarter Horse - Equestrian Quarterhorse Weathervane, Complete w/ Choice of MountQuarter Horse - Equestrian Quarterhorse Weathervane, Complete w/ Choice of Mount $49.95 Good Directions Kent Cupola 22"es x 27"es Vinyl-Wood NewGood Directions Kent Cupola 22"es x 27"es Vinyl-Wood New $333.53
Eagle Weathervane Wind Spinner Outdoor Roof Top Weather Instrument DecorativeEagle Weathervane Wind Spinner Outdoor Roof Top Weather Instrument Decorative $170.51 Montague Metal Products Quail Weathervane, 32-Inch, Natural, New, Free ShippingMontague Metal Products Quail Weathervane, 32-Inch, Natural, New, Free Shipping $83.44
Old English D Weathervane Weather Vane Complete with Choice of MountOld English D Weathervane Weather Vane Complete with Choice of Mount $59.95 Flagpole Hardware Gold Eagle Aluminum Topper 12 Inch Outdoor Decorations FlagFlagpole Hardware Gold Eagle Aluminum Topper 12 Inch Outdoor Decorations Flag $71.29
Antique Look - United States Flag Weathervane - U.S. - American Old GloryAntique Look - United States Flag Weathervane - U.S. - American Old Glory $49.95 Whitehall Products 30 in. Eagle Weathervane With Globes Outdoor Wind Roof MountWhitehall Products 30 in. Eagle Weathervane With Globes Outdoor Wind Roof Mount $105.05
Konus Usa Meteostat Electronic Weather Station Weathervane, NewKonus Usa Meteostat Electronic Weather Station Weathervane, New $27.66 eagle weathervane black wrought iron look roof mount made in usa Tls1016Rmeagle weathervane black wrought iron look roof mount made in usa Tls1016Rm $21.99
Good Directions Manchester Cupola 26"es x 32inches NewGood Directions Manchester Cupola 26"es x 32inches New $586.20 Dog - Bulldog Weathervane - Bull Dog Weather Vane - Complete w/ Choice of MountDog - Bulldog Weathervane - Bull Dog Weather Vane - Complete w/ Choice of Mount $59.95
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Train - Locomotive Weathervane, Steam Engine Weather Vane with Choice of MountTrain - Locomotive Weathervane, Steam Engine Weather Vane with Choice of Mount $49.95 fleur de lis weathervane black wrought iron louisiana symbolfleur de lis weathervane black wrought iron louisiana symbol $21.99
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Handmade Lhasa Apso Dog Copper WeathervaneHandmade Lhasa Apso Dog Copper Weathervane $63.99 Cardinal Thermometer and Clock Copper VerdiCardinal Thermometer and Clock Copper Verdi $66.99
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 Good Directions 301-11 Steel Weathervane Extension Rod, 11-Inch NewGood Directions 301-11 Steel Weathervane Extension Rod, 11-Inch New $33.39
Montague Metal Products Flagpole Eagle 12-Inch GoldMontague Metal Products Flagpole Eagle 12-Inch Gold $66.84 Color Flagpole Eagle Proudly Natural Color Hand Painted Hand Cast Aluminum 12 "Color Flagpole Eagle Proudly Natural Color Hand Painted Hand Cast Aluminum 12 " $102.99
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Prices current as of last update, 09/24/17 5:28pm.

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

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