What is the minimum airspeed required for autopilot engagement on the CRJ 900?

The minimum airspeed required for autopilot engagement on the CRJ 900 is indeed 200 knots. This requirement ensures that the aircraft is at a safe speed for the autopilot systems to function effectively and maintain control, particularly as the aircraft transitions through different phases of flight such as climb or cruise. Engaging the autopilot at a speed lower than this could lead to insufficient aerodynamic pressure on the control surfaces, which is critical for the reliable operation of the autopilot systems. Therefore, achieving a minimum airspeed of 200 knots is essential for ensuring safe and reliable autopilot operation. This limitation helps to safeguard against potential control issues that could arise during low-speed conditions.