wind vane


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wind vane:

see weather vaneweather 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.
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wind vane

[′win ‚vān]
(engineering)
An instrument used to indicate wind direction, consisting basically of an asymmetrically shaped object mounted at its center of gravity about a vertical axis; the end which offers the greater resistance to the motion of air moves to the downwind position; the direction of the wind is determined by reference to an attached oriented compass rose.

wind vane

A device to indicate wind direction. A wind vane always points into the wind. It works on the principle of weathercocking. See weather vane.
References in periodicals archive ?
Richard is equally fond of cupola attachments: lightning rods, balls, wind vanes or arrows, directionals (fixed indicators of N-S-E-W directions) and pendants (ornamental glass pieces hung from lightning rod holders).
The same computer also takes constant note of the current wind speed, from an anemometer mounted next to the wind vane. It adjusts the angle of attack of the rotor blades for efficiency and to keep the speed of rotation within safe limits.
The main characteristics of the market are: - the studies, - the development and production of 2 prototypes, - the manufacture of a series of 160 wind vane, - the supply of the doe, - warranty.
Step 4: Punch a small hole in the bottom middle of your wind vane.
Contract notice: treatment of the obsolescence of the wind vane of the 73 trams of 32 meters of the tcl network reference number: 18s0235
On the ceiling of the cupola is beautiful painted sky scene and golden wind vane.it is not the original dome as that had long since disappeared but the trust knew one existed as joists could still be seen and it was also included in James Corbridge's map of Newcastle dating back to 1723.
Each day, write down your observations from your wind vane and barometer too.
Replacement of existing and obsolete vane vanes with a new system of amber colored wind vane. the system will be an off-the-shelf product, slightly adaptable to fit into the existing citadis 302 and 401 market trams broken down into a firm slice and an optional slice: firm slice: renewal of the wind vane system on the 302 and 401 trainsets optional slice maintenance: maintenance and maintenance in operational condition.
(Lightweight cardboard can also be used instead of index cards.) They can either hold their wind vane, push it into the ground, or push it into an upside down styrofoam cup stuck down to any flat surface with modeling clay.
Tenders are invited for Supply of hand held anemometer and hand held wind vane
You can hold your wind vane or push the pencil into the ground Use a compass to check direction.