1. Nov 27, 2011 #1

   Einherjer

   

   Does Betz law apply to helicopters? I.e will maximum 59% of power supplied by an helicopter actually provide lift?

    

   Einherjer, Nov 27, 2011
2. 
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3. Nov 27, 2011 #2

   rcgldr

   

   Homework Helper

   Betz law applies to turbines that extract energy from a moving gas or fluid, it doesn't apply to propellers or rotors that add energy to a gas or fluid.

    

   rcgldr, Nov 27, 2011

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