Hello all, i've got a few questions about helicopter rotors. On which parameters does the thrust of an helicopter rotor depend? If i have: a 2-blade rotor, 8 feet of diameter. A 4-blade rotor, 4 feet of diameter. Do they have the same thrust? Or the second rotor will have less thrust because of the smaller radius(and less tangential speed)? And in the case of a tip-jet helicopter? Even reducing the diameter, the tangential speed is about the same, right? Sorry for the stupid questions and my bad english. Thanks for any answer.