What is the Vfe for flap setting 45?

Vfe, or the maximum flap extended speed, is a critical airspeed limit that pilots must adhere to when deploying flaps to ensure safe operation of the aircraft. For the CRJ 200, the Vfe for a flap setting of 45 degrees is indeed 170 KIAS. This limit is established to prevent potential structural damage or control issues that could arise from exceeding the designated speed with flaps extended.

When the flaps are set to 45 degrees, this increase in lift allows for a steeper approach and slower landing speed, but flying faster than 170 KIAS with these flaps deployed can lead to excessive forces on the wing structure and other aerodynamic complications. It’s crucial for pilots to be aware of Vfe to effectively manage the aircraft's performance during critical phases like approach and landing while ensuring safety margins are integrated into their flying practices.