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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Good Directions Victorian Arrow Weathervane, Pure CopperGood Directions Victorian Arrow Weathervane, Pure Copper $227.73 Antique Metal Eagle Weathervane!Antique Metal Eagle Weathervane! $550.00
Swedish Atlas Armillary Sphere Sundial Weathervane 1940'sSwedish Atlas Armillary Sphere Sundial Weathervane 1940's $495.00 New! Good Directions Rooftop Collection Copper Brass Weathervane Galloping HorseNew! Good Directions Rooftop Collection Copper Brass Weathervane Galloping Horse $59.99
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Goat Weathervane - Farm - Weather Vane - Complete w/ Choice of MountGoat Weathervane - Farm - Weather Vane - Complete w/ Choice of Mount $73.95 New ListingEagle in flight Weathervane brass Finish Weather Vane Hand CraftedNew ListingEagle in flight Weathervane brass Finish Weather Vane Hand Crafted $195.00
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Accentua Ozark Vinyl Cupola, 20 in. Square, 31 in. HighAccentua Ozark Vinyl Cupola, 20 in. Square, 31 in. High $499.00 Vtg Antique Horse & Buggy Carriage Weathervane Or Mailbox Topper,Salvaged FindVtg Antique Horse & Buggy Carriage Weathervane Or Mailbox Topper,Salvaged Find $20.00
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Accentua Yosemite Vinyl Cupola, 24 in. Square, 38 in. HighAccentua Yosemite Vinyl Cupola, 24 in. Square, 38 in. High $649.00 Sperm Whale Weathervane (Roof Mounting Included)Sperm Whale Weathervane (Roof Mounting Included) $68.99
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Vintage Metal Weather Vane Painted Rooster on StandVintage Metal Weather Vane Painted Rooster on Stand $87.88 Accentua Monterey Vinyl Cupola, 24 in. Square, 39 in. HighAccentua Monterey Vinyl Cupola, 24 in. Square, 39 in. High $719.00
Soft Coated Wheaten Hand Carved Hand Painted Basswood Dog WeathervaneSoft Coated Wheaten Hand Carved Hand Painted Basswood Dog Weathervane $699.99 to Airedale Hand Carved Hand Painted Basswood Dog WeathervaneAiredale Hand Carved Hand Painted Basswood Dog Weathervane $699.99 to
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Yorkshire Terrier Hand Carved Hand Painted Basswood Dog WeathervaneYorkshire Terrier Hand Carved Hand Painted Basswood Dog Weathervane $699.99 to Montague Metal Products hand cast aluminum 24 In. Horse Weathervane unopened boxMontague Metal Products hand cast aluminum 24 In. Horse Weathervane unopened box $48.00
Horse Running Weathervane Antique Copper Finish Weather Vane Hand CraftedHorse Running Weathervane Antique Copper Finish Weather Vane Hand Crafted $200.00 Cupola vintage removed from old barn in Vernon county Wisconsin by the AmishCupola vintage removed from old barn in Vernon county Wisconsin by the Amish $950.00
Vintage Copper and Brass 3 Dimensional Rooster Weathervane 17"Vintage Copper and Brass 3 Dimensional Rooster Weathervane 17" $99.99 Siberian Husky Hand Carved Hand Painted Basswood Dog Weathervane Red/WhiteSiberian Husky Hand Carved Hand Painted Basswood Dog Weathervane Red/White $699.99 to
Accentua Laguna Vinyl Cupola with Copper Roof, 20 in. Square, 32 in. HighAccentua Laguna Vinyl Cupola with Copper Roof, 20 in. Square, 32 in. High $549.00 John Deere Tractor Weathervane - Farm - Weather Vane,Complete w/ Choice of MountJohn Deere Tractor Weathervane - Farm - Weather Vane,Complete w/ Choice of Mount $73.95
Accentua Bryce Vinyl Cupola, 20 in. Square, 26 in. HighAccentua Bryce Vinyl Cupola, 20 in. Square, 26 in. High $389.00
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Prices current as of last update, 05/29/23 7:14am.

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

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