An instrument that determines the direction from which a wind is blowing.
mechanical device attached to an elevated structure; rotates freely to show the direction of the wind
a device used to indicate the direction from which wind is blowing (e
an instrument that lets us detect which way the wind is coming from
a tool for measuring wind direction
Any instrument designed primarily to measure wind direction .
Measures the wind direction and allows the yaw drive to direct the windmill properly depending on the direction of the wind.
Measures wind direction and communicates with the yaw drive to orient the turbine properly with respect to the wind.
A device used to measure wind direction.
an instrument used to indicate wind direction
flag-like vane mounted on a vertical post free to align itself with, and indicate the direction of, the wind. Also an instrument performing the same function.
An instrument used to determine wind direction. Differs from an aerovane in that it does not measure wind speed. It has no propeller.
An instrument that indicates the wind direction. The end of the vane which offers the greatest resistance to the motion of the air moves to the downwind position.