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Wind cup anemometer

  1. May 17, 2012 #1
    How is it possible without knowing the wind direction to work out which direction the cups are moving (ie clockwise or anticlockwise round) simply by looking at a diagram of a wind cup anemometer? Does the wind always blow into the hollow end of a cup and then each cup moves forward and the next one takes its turn?

    What does 'On an anemometer with four cups it is easy to see that since the cups are arranged symmetrically on the end of the arms, the wind always has the hollow of one cup presented to it and is blowing on the back of the cup on the opposite end of the cross' mean?
  2. jcsd
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