What is the minimum N1 setting for reduced thrust?

The minimum N1 setting for reduced thrust in the CRJ 200 is 83.5%. This value is specified by the aircraft's operating procedures to ensure optimal performance and safety during various flight conditions. Reduced thrust settings are used to enhance engine life, reduce noise, and improve fuel efficiency, especially during takeoff phases when maximum performance might not be necessary due to runway length or other factors.

Maintaining the N1 setting at 83.5% allows for a safe margin while balancing performance requirements and engine efficiency. Operating with a setting below this threshold could compromise engine performance during critical phases of flight. In contrast, higher settings could lead to unnecessary engine wear and increased noise levels, which is not ideal for operational considerations. This is why the other options—either below or above this threshold—would not align with the established standard for reduced thrust operations in the CRJ 200.