In which of the following, does machine rotor drives through a step up gear box?
(a) Horizontal axis with two aerodynamic blades
(b) Horizontal axis propeller type wind mill
(c) Horizontal axis multi bladed type wind mill
(d) Sail type wind mill
The question was posed to me in examination.
I would like to ask this question from Horizontal Axis Wind Mill topic in division Wind Energy of Energy Engineering