energy
 

 energy  why







 

Question by  Cara (72)

Why does a windmill have 3 blades?

 
+6

Answer by  Chupacabra (174)

It is more efficient to have a few longer blades that still provide a lot of surface area while not adversely affecting neighboring blades with turbulence.

 
+6

Answer by  Cali2307 (1337)

There has to be an odd number of blades in order to avoid excessive wobbling. Three are used to provide the most efficiency with the little stress on the metal.

 
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