Question

Why is Savonius rotor not suitable for installation?

(a) Because of long drive shaft

(b) Because of its low capacity motor

(c) Because of its typical blade design

(d) Due to the light material it is made of

The question was asked in quiz.

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

Answer 1

Correct answer is (a) Because of long drive shaft

To explain I would say: Savonius rotor is not useful for very high installation because of long drive shaft problems. Bracing of the topmost bearing above the rotor of a very tall vertical axis machine is difficult requiring very long guy wires.