The TH-73A main rotor assembly features what type of inertia rotor head?

• A. High
• B. Medium
• C. Low
• D. Neutral

Answer: (C)

The TH-73A features a low inertia rotor head, which is designed specifically to enhance responsiveness and maneuverability during flight. A low inertia rotor head allows for quicker blade flapping, which improves the helicopter's ability to respond to pilot inputs and changes in flight conditions. This characteristic is critical for training environments, where novice pilots may need to experience rapid changes in flight dynamics and handling.

The design of a low inertia rotor system helps to reduce the overall rotor system mass and improves the rotor's ability to execute rapid changes in pitch and roll. This is particularly beneficial for flight training, making the helicopter more nimble and easier to control, while still allowing for safe operation as pilots develop their skills. The design philosophy behind low inertia rotor systems typically emphasizes agility, allowing the aircraft to perform a wide range of maneuvers necessary for effective piloting training.