Which component transmits the three amplified main rotor control signals to the swashplate?

• A. Pitch links
• B. Swashplate frame
• C. Mixing lever assembly
• D. Control rods

Answer: (C)

The mixing lever assembly is the part that takes the three pilot inputs (collective and the two cyclic directions), sums and amplifies them, and moves the swashplate accordingly. This assembly translates those combined commands into the exact swashplate motion needed to create the proper blade pitch changes as the rotor turns. Once the swashplate is moved, the pitch links then transmit that motion to each blade’s pitch horn, producing the required blade pitch for every blade in the rotation. The swashplate frame is just the mounting structure, and the control rods are the links feeding signals into the mixing mechanism; they don’t directly deliver the three amplified signals to the swashplate by themselves.