Newton's Third Law accounts for 100% of the lift generated by a helicopter rotor, as confirmed in the discussion. Bernoulli's principle also plays a crucial role in lift generation, applying to the airflow above and below the rotor blades. However, it does not account for lift across the rotor plane since energy is added to the air through work done by the rotor. A NASA article on propeller analysis provides further insights into these principles.
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100%.06mangro said:I would like to know how much of a % does Newtons 3rd law (action / reaction) account for lift of a chopper.
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:06mangro said:Bernoulli's principle.