A wind cone visually indicates prevailing wind direction at a particular location on an airfield or heliport. FAA Size 2 wind cones are used for airports at a central position on the airfield. FAA Size 1 rigid wind cones are installed at small airfields and heliports. FAA Size 1 frangible wind cones are called "‘supplemental wind cones" as they are installed in addition to the main wind cone adjacent to each runway touchdown zone to indicate local wind conditions. Wind cones are commonly supplied with a single obstruction light and four floodlights to illuminate the windsock.
The customer may select lighting, windsock color, and windsock material without affecting FAA approval. Rigid wind cones use hinged poles which allow the top windsock and lighting assembly to be lowered for servicing.
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