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Which type of axis does a Savonius Rotor has?

(a) Horizontal axis

(b) Mediolateral axis

(c) Vertical axis

(d) Lateral Axis

This question was addressed to me in class test.

This is a very interesting question from Vertical Axis Wind Mill in chapter Wind Energy of Energy Engineering

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The correct choice is (c) Vertical axis

The explanation is: A Savonius wind energy conversion system has a vertical axis and hence eliminates the expensive power transmission system from the rotor to the axis. Since it is a vertical axis machine it does not matter much about the wind direction.

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