What is the maximum flap extension speed (Vfe) for flap 45 on the CRJ 900?

The maximum flap extension speed (Vfe) for flap 45 on the CRJ 900 is 145 knots. This speed is critical because it signifies the maximum airspeed at which the flaps can be safely extended to that position without risking structural integrity or performance issues. Each flap setting has a specific Vfe, which limits the speed to ensure that the aircraft can handle the aerodynamic forces acting on it when the flaps are deployed.

In practice, adhering to this limitation is crucial for safe operation, particularly during approach and landing phases when the aircraft is configured for lower speeds. Understanding these limitations helps pilots manage the aircraft’s performance effectively under varying flight conditions.