A helicopter main rotor or rotor system is a type of fan that is used to generate both the aerodynamic lift force that supports the weight of the helicopter , and thrust which counteracts aerodynamic drag in forward flight .
Rotor
Rotor
Make this easier to understand: A helicopter main rotor or rotor system is a type of fan that is used to generate both the aerodynamic lift force that supports the weight of the helicopter , and thrust which counteracts aerodynamic drag in forward flight . Output: