What does a propeller RPM of 1768 RPM signify?

A propeller RPM of 1768 RPM indicates that the propeller is operating at a specific speed, which is relevant in determining the condition of the aircraft’s performance and safety measures. In the context of the King Air 350, the maximum continuous operating RPM for the propellers is typically around 1700 RPM. Consequently, an RPM reading of 1768 would exceed this limit, which is categorized as an overspeed condition.

Exceeding the approved RPM not only compromises engine efficiency but also poses a significant risk of mechanical failure. Propellers are designed to operate within a specified range to ensure optimal performance and safety, making it critical to monitor RPM to prevent potential hazards. Thus, a reading of 1768 RPM is indicative of an overspeed situation that requires immediate corrective measures to bring the propeller RPM back within normal operating limits.