Which flight control changes the blade pitch equally on all four main rotor blades?

• A. Cyclic
• B. Collective
• C. Anti-Torque Pedals
• D. Trim

Answer: (B)

Collective pitch changes the blade pitch equally on all main rotor blades. When you raise the collective, every blade increases its pitch at once, boosting lift and making the helicopter rise; lowering it decreases pitch and causes descent. This uniform adjustment across all blades is what sets the collective apart from cyclic (which varies pitch around the rotor to tilt the rotor disc) and from anti-torque pedals (which change tail rotor thrust for yaw) and trim (which helps maintain a steady attitude).