Davis Spar Fly Wind Indicator with Mount

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Price: $20.04 Too low to display   

Product Feature

• Spoiler holes in the vane reduce lift and increase accuracy
• Unaffected by angle of heel
• Comes equipped with both a top mount fitting and the new quick-release side mount
• Easily seen from the deck because of its V-shaped silhouette and bright red color
• Weight: 1.25 oz; Length: 15 in

Product Description

Spar-Fly combines needle bearing balance, high impact plastic, and marine grade metals for unsurpassed sensitivity and durability. Spoiler holes in the vane reduce lift and increase accuracy. Spar-Fly is unaffected by angel of heel. Easily seen from the deck because of its V-shaped silhouette and bright red color. Weighs only 1.25 oz. (35 g).

Davis Spar Fly Wind Indicator with Mount Review

I bought this to do simple weather observations with my kindergarten age kids, and indicate wind direction. I didn't want a complex digital anemometer or something, just a simple pointer. I set it up on the bearing carefully and balanced it. I have mine mounted on a large melamine laminate base onto which is painted a big compass rose, that I orient with a magnetic compass.

Unfortunately the wind tends to just spin this thing around in continual circles. While the bearings are obviously low enough friction, the indicator has a lot of mass and once the wind blows it, it just continues around under inertia. To get a steady reading in any particular direction, the wind has to be fairly strong and consistently blowing only one way. To indicate the direction of lighter gusts, the indicator needs bigger wind-catching vanes and less mass in the rotating assembly.

I'm hoping this will work in upcoming observations, but so far it's proven worthless -- just spins around and around in circles continually.

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