What function does the collective control perform?

• A. Adjusts rotor blade pitch individually
• B. Increases/decreases pitch of all blades simultaneously
• C. Regulates hydraulic pressure
• D. Modulates fuel mixture to engines

Answer: (B)

The collective control serves a crucial function in helicopter flight by increasing or decreasing the pitch of all rotor blades simultaneously. This control allows the pilot to manage the helicopter's lift effectively. When the pilot pulls up on the collective, it increases the pitch angle of the rotor blades, producing more lift and allowing the helicopter to ascend. Conversely, pushing down on the collective decreases the pitch angle, reducing lift and causing the helicopter to descend. This simultaneous adjustment ensures that the helicopter maintains stable flight characteristics and responds predictably to the pilot’s inputs, which is essential for controlling the aircraft during various maneuvers, especially during takeoff, landing, and in hover.

The other functions listed do not accurately describe the role of the collective control. While rotor blade pitch and lift are directly managed by the collective, individual blade pitch adjustment is controlled through cyclic inputs, hydraulic pressure regulation involves other systems outside of direct pilot control, and fuel mixture modulation is managed by separate engine control systems.