Which type of windmill blades are made out of sheet metal or aluminum?(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 asked in class test.This is a very interesting question from Horizontal Axis Wind Mill in division Wind Energy of Energy Engineering

Which type of windmill blades are made out of sheet metal or aluminum?

1.	Which type of windmill blades are made out of sheet metal or aluminum?(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 asked in class test.This is a very interesting question from Horizontal Axis Wind Mill in division Wind Energy of Energy Engineering
Answer» Right option is (c) Horizontal axis MULTI bladed TYPE wind mill The explanation is: Horizontal axis multi blade windmill is made from sheet metal or aluminum. The rotors have high strength to weight ratios. They have good power COEFFICIENT, high starting torque and added ADVANTAGES of simplicity and LOW cost.

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