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Betz law

  1. Nov 27, 2011 #1
    Does Betz law apply to helicopters? I.e will maximum 59% of power supplied by an helicopter actually provide lift?
  2. jcsd
  3. Nov 27, 2011 #2


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    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.
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