Which type of vertical wind machine has relatively low solidity and low starting torques?

Which type of vertical wind machine has relatively low solidity and low starting torques? Correct Answer Darrieus type rotor

Darrieus type rotors are lift devices characterized by curved blades with air foil cross sections. They have relatively low solidity and low starting torques, but high tip to wind speeds and therefore relatively high power outputs per given rotor weight and cost.
Bissoy MCQ

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