Describe the function of the rudder in the CRJ.

The rudder in the CRJ serves the primary function of controlling the aircraft's yaw, which is the rotation around the vertical axis. This movement is crucial for maintaining directional control during various phases of flight, especially during takeoff, landing, and when correcting for crosswinds. By adjusting the angle of the rudder, pilots can steer the aircraft left or right, helping to keep it aligned with the runway centerline or maintain a desired course.

In addition to its role in yaw control, the rudder works in conjunction with the ailerons and elevators to ensure balanced flight. It aids in coordinating turns and can also be used to counteract any side-slip during maneuvers. Therefore, the rudder is an essential control surface that enhances the overall maneuverability and stability of the aircraft.