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How much does Newtons 3rd Law account for Lift in %?

  1. Sep 7, 2012 #1
    I would like to know how much of a % does newtons 3rd law (action / reaction) account for lift of a chopper.. i would also like to know this for Bernoulli's principle..
    Can you give a source to back it up?

    I cant find an answer any where
  2. jcsd
  3. Sep 7, 2012 #2


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    Applies above and below the rotor, but not across the plane of the rotor, because energy is added to the air (work is done). Link to NASA article for propellors, a similar case:

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