For the CRJ 900, what is the maximum speed with flaps set to 45 degrees?

When operating the CRJ 900 with flaps extended to 45 degrees, the maximum indicated airspeed is established at 170 knots true airspeed (KIAS). This limitation is crucial as exceeding this speed can compromise the aircraft's performance during critical phases of flight, such as approach and landing.

The limitation for flap extension speeds is determined by aerodynamic considerations, ensuring that the aircraft can maintain controllability and stability while the flaps are deployed to their fullest extent. By adhering to this speed, pilots ensure optimal lift characteristics and prevent possible structural stress that can occur from operating beyond designed airspeed parameters with the flaps in a fully extended position. Understanding this maximum speed aids in maintaining safety and operational efficiency during approach and landing scenarios.