What is the standard distance for safe clearance from a Turbo Prop Engine's propeller?

The standard distance for safe clearance from a Turbo Prop Engine's propeller is 10 feet. This distance is established to ensure the safety of personnel by minimizing the risk of injury from the hazards posed by the rotating propeller blades. At this range, individuals are less likely to be within the striking distance of a blade which can cause severe injuries or fatalities due to the high speed and force of the propeller's rotation.

Maintaining this distance also accounts for various operational factors, such as wind conditions and engine performance, which may affect the behavior of debris or the thrust produced by the engine. It's essential for aircrew and ground personnel to adhere to this guideline to foster a safe environment around the aircraft.