To maintain the desired hovering altitude in no wind conditions, what must be adjusted?

To maintain the desired hovering altitude in no wind conditions, it is crucial to adjust the main rotor thrust. In a hover, the helicopter must generate enough lift to counteract its weight and maintain altitude. This is achieved by manipulating the rotor thrust.

When a helicopter is hovering, the main rotor needs to create a specific amount of lift based on the total weight of the aircraft. If the weight increases (for example, due to fuel, cargo, or passengers), the rotor must produce more thrust to maintain altitude. Conversely, if the weight decreases, the thrust can be reduced.

Adjusting the main rotor thrust can involve changing rotor speed or altering the pitch of the rotor blades to increase or decrease lift. This action directly influences the helicopter's ability to hover steadily. Therefore, maintaining the correct rotor thrust is essential for sustaining the desired altitude when there are no environmental factors, such as wind, to assist or hinder lift.