What is the primary purpose of the tail rotor system in a helicopter?

The primary purpose of the tail rotor system in a helicopter is to balance the torque effect from the main rotor. When the main rotor spins in one direction, the helicopter's body tends to rotate in the opposite direction due to torque. The tail rotor counteracts this torque by generating a horizontal thrust that stabilizes the helicopter and allows for controlled flight. This stabilization is essential for maintaining directional control and preventing unwanted rotation.

In addition to balancing torque, the tail rotor plays a crucial role in yaw control, allowing the pilot to turn the helicopter to the left or right by adjusting the pitch of the tail rotor blades. This ensures that the helicopter can operate safely and effectively, particularly during maneuvers where directional precision is vital.