What feature helps the TH-73A maintain stability during flight?

• A. Stabilator
• B. Horizontal stabilizer
• C. Autopilot system
• D. Tail rotor

Answer: (D)

The correct feature that helps the TH-73A maintain stability during flight is the tail rotor. The tail rotor plays a crucial role in providing directional control and countering the torque produced by the main rotor system. By producing thrust that is perpendicular to the main rotor's rotation, the tail rotor allows the pilot to maintain control over the helicopter's yaw axis. This stability is essential for safe flight operations, especially during maneuvers that require precise handling.

In contrast, while the stabilator and horizontal stabilizer contribute to stability in fixed-wing aircraft and the autopilot system enhances control during flight, they do not specifically address the unique stability needs in a rotary-wing platform like the TH-73A. The tail rotor's ability to counteract the effects of torque and maintain heading is a fundamental aspect of helicopter design and operation, underscoring its importance for stability in flight.