What percentage will Nr reduce to upon deactivation of interim power?

Upon deactivation of interim power, the rotor speed (Nr) will reduce to 100%. This is significant because in many rotorcraft systems, interim power is employed to temporarily boost performance, requiring a higher rotor speed to maintain optimal flight characteristics. Once this interim power is deactivated, the rotor system reverts to its normal operational parameters, which in this case means maintaining the standard rotor speed of 100%. This reflects the system's designed limits and ensures safe operation within specified performance margins.

Understanding this concept is crucial for pilots and maintenance personnel, as it directly relates to aircraft behavior during different power conditions and impacts flight safety and efficiency.