Which component transmits flight control signals from the swash plate to the main rotor blades?

• A. 4-Way switch
• B. Pitch Change Link
• C. Wiper
• D. Top right

Answer: (B)

Pitch change links carry the swash plate’s motions to the rotor blades. When you move the cyclic and collective controls, the swash plate tilts and shifts the pitch platform. The pitch change links connect from the swash plate to each blade’s pitch horn, so as the swash plate tilts, these links push or pull on the blade horns to change each blade’s angle of attack during rotation. That adjustment is what lets the helicopter steer and lift. Other options aren’t part of the rotor head’s mechanism for transmitting control signals, so they don’t convey those motions to the blades.