Catalogue reference AK-92 · Original source page 19Wind Vane
requirements for accurate indication of wind direction. It is designed to produce the maximum of torque relative to its moment of generator for a given change in wind direction.It rotates with minimum friction, and is balanced to avoid bias towards any particular direction. Most suitable for mounting on buildings very useful Meteorological departments. As per I.S.I. specification with cardinal points on cast iron stand
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