Final answer:
Tilting the main rotor disk in the desired direction is achieved by adjusting the pitch angles of the rotor blades in a helicopter.
Step-by-step explanation:
In a helicopter, tilting the main rotor disk in the desired direction is achieved by adjusting the pitch angles of the rotor blades. The rotor blades of a helicopter are like long airplane wings and can be rotated on an axis, allowing them to engage the wind at different angles. By changing the pitch of the rotor blades, the lift and thrust generated by the rotor disk can be controlled, enabling the helicopter to tilt and move in the desired direction.
This adjustment of the rotor disk allows the helicopter to change its orientation and move forward, backward, left, or right. By increasing the lift on one side of the rotor disk and decreasing it on the other, the helicopter can tilt in the desired direction and generate a net force for movement.
For example, if the pilot wants the helicopter to move forward, the pitch angles of the rotor blades can be increased on the side facing backward, while decreasing the pitch angles on the side facing forward. This creates a net force in the forward direction, causing the helicopter to tilt and move forward.