Why are twin rotor configuration used?(a) To generate more lift(b) To counter torques(c) To generate pitching motion(d) To generate yaw motionI got this question in an international level competition.I want to ask this question from Helicopter Rotor and Notations topic in portion Helicopter Dynamics of Aerodynamics

Why are twin rotor configuration used?(a) To generate more lift(b) To

1.	Why are twin rotor configuration used?(a) To generate more lift(b) To counter torques(c) To generate pitching motion(d) To generate yaw motionI got this question in an international level competition.I want to ask this question from Helicopter Rotor and Notations topic in portion Helicopter Dynamics of Aerodynamics
Answer» The CORRECT choice is (c) To generate pitching MOTION For explanation: A twin rotor configuration is USED in a helicopter to COUNTER the torque generated by the main rotor. The rotors are counterrotating with equal size and loading. This leads to no NET yaw motion which can be detrimental.

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