Which component transmits flight control movement to the main rotor head through the pitch control rods?

• A. Provide tail rotor yaw control
• B. Transmit flight control movement to the main rotor head through the pitch control rods
• C. Increase rotor speed
• D. Lock rotor head

Answer: (B)

In helicopter control, blade pitch is changed by a pitch-control system that takes the pilot’s inputs and passes them through pitch rods to the rotor head. The swashplate sits on the rotor mast and converts cyclic and collective commands into movement that is transmitted via the pitch control rods to each blade’s pitch horn. That transmission path—pilot input moved through the pitch rods to the main rotor head—is exactly what this option describes. The other choices refer to yaw control, rotor speed, or locking the rotor head, none of which describe how blade pitch is transmitted to the rotor.