How is altitude maintained during flight operations in the TH-73A?

• A. By using the cyclic control
• B. Through manual adjustments to the rotor
• C. Using collective control and monitoring the altimeter
• D. By varying the weight of the cargo

Answer: (C)

Maintaining altitude during flight operations in the TH-73A is primarily achieved through the use of collective control paired with continuous monitoring of the altimeter. Collective control adjusts the pitch of the rotor blades collectively, which influences the amount of lift being produced. By pulling the collective up, the pitch increases, generating more lift and causing the aircraft to climb. Conversely, lowering the collective reduces the pitch and lift, resulting in descent.

The altimeter provides crucial feedback on the aircraft's altitude, allowing the pilot to make necessary adjustments to maintain a desired flight level. Pilots are trained to constantly monitor this instrument to ensure they are staying at the intended altitude and to react appropriately to any altitude deviations.

While the cyclic control influences lateral movements and can affect altitude indirectly, it does not directly maintain altitude in a vertical sense. Manual adjustments to the rotor would imply a more labor-intensive method that is not standard operational practice in flight. Varying the weight of the cargo could impact overall lift but is not a practical method for maintaining altitude during flight operations, as it does not allow for real-time adjustments needed for effective altitude control.