3 ms·

Does it? The same airfoil needs the same speed to provide a given amount of lift, regardless of whether it’s a wing or a propellor.

• alexis_fr 8y ago
  The speed of a propeller is low close to the rotor, and sometimes faster than sound at the extremity of the blades. Can’t reduce sound on that.
  • sokoloff 8y ago
    Propeller efficiency takes a nose dive when the tips go supersonic. Most props therefore do not operate in this range.