What is the consequence of operating the propeller above the governed RPM?

When operating the propeller above the governed RPM, the overspeed governor comes into play. This mechanism is designed to prevent the propeller from exceeding its maximum RPM limits, which can otherwise lead to potential damage to the propeller and the engine. The overspeed governor senses when the propeller RPM exceeds a predetermined threshold and acts to reduce the RPM back into the safe operating range. This is typically accomplished by adjusting the pitch of the propeller blades, which increases drag and helps slow down the propeller's rotation.

Understanding this function is crucial for pilots. The overspeed governor ensures that the aircraft operates within safe RPM limits, thereby protecting the integrity of both the propeller and the engine. If the overspeed governor were to fail or not function correctly, it could result in significant operational risks or engine failure.