It meets three important requirements for accurate indication of Wind direction. It is designed to produce the maximum torque relative to Its moment of inertia, for a given change in wind directions it rotates with the minimum of friction, and is...
With phosphorbronze bearings mounted on steel pivot. Pillar terminates in 1 inch BSP ( male) thread, complete with lock - nut . Height 38 cms. With mark NEWS points....
Designed to produce maximum torque relative to its moment of inertia as for a given change in wind direction, it is rotated with the minimum of friction and is balanced to avoid bias towards any particular direction. Balanced vane with bearing...
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