How many main rotor tandem servo actuators are present?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (C)

The correct answer is three because the TH-73A helicopter is designed to utilize a sophisticated rotor system where the main rotor tandem servo actuators play a crucial role in controlling the main rotor blades' pitch and subsequently the helicopter's flight characteristics. These three actuators enable precise control, ensuring stable and responsive handling during various maneuvers.

Having three actuators allows for redundancy and increased reliability. This configuration ensures that if one actuator were to fail, the other two can still function to maintain control, enhancing the safety of the aircraft. The design also facilitates smooth adjustments for pitch changes, allowing the helicopter to respond quickly to pilot inputs. This level of control is essential for training scenarios, where students require an accurate replication of flight dynamics and performance.