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The cups of the anemometer are made from the aluminum. Cut 2 circles about 4" in diameter. Cut these circles in half along the diagonal. Join the straight edges with aluminum solder, malting 4 small cups.
Attach the cups to 2 crossed sticks, so that all are heading in the same direction, as illustrated. Join sticks to dowel stock as follows: Nail, bead, crossed sticks, bead, dowel stock. Beads will act as bearings so the wind will turn anemometer freely.
Note that spinning is faster as the force of the wind increases.
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Updated: March 12, 2004