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 millThe 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

In which of the following, does machine rotor drives through a step up

1.	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 millThe 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
Answer» The CORRECT option is (a) Horizontal axis with two aerodynamic blades The BEST I can explain: In horizontal axis with two aerodynamic type windmill the machine ROTOR drives through a step up gear box. The blade rotor is DESIGNED to orient downwind of the tower. The components are mounted on bed plate which is attached on a PINTLE at the top of the tower.

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