What is the primary control surface for adjusting pitch in the TH-73?

• A. The aileron control
• B. The rudder control
• C. The cyclic control
• D. The collective control

Answer: (C)

The cyclic control is the primary control surface for adjusting pitch in the TH-73. It allows the pilot to tilt the rotor disc in any direction, enabling changes in pitch and forward, backward, and lateral movement of the helicopter. When the pilot moves the cyclic control forward, it tilts the rotor forward, causing the helicopter to pitch down and gain forward speed. Conversely, pulling back on the cyclic pitches the helicopter upward, allowing for ascent or a decrease in forward velocity. The cyclic’s ability to change the angle of the rotor aircraft in real-time makes it crucial for controlling pitch and managing the helicopter's flight path effectively.

In contrast, the aileron control primarily affects roll, the rudder control is used to control yaw, and the collective control alters the overall lift by changing the pitch of all rotor blades simultaneously. While each of these controls plays a vital role in helicopter operation, only the cyclic directly manipulates pitch during flight maneuvers.