What is the maximum propeller diameter allowed for the Cessna 152?

The maximum propeller diameter allowed for the Cessna 152 is 69 inches. This specification is part of the aircraft's design parameters, ensuring that the propeller operates efficiently within the performance characteristics defined by the manufacturer.

Using a propeller that adheres to this maximum diameter allows for optimal thrust and helps maintain the aircraft's operational limits. Increasing the propeller diameter beyond this maximum can lead to adverse effects on performance, including reduced climb rate and potential issues with engine and airframe stress during operation. Thus, adhering to the specified propeller diameter is crucial for safe and efficient flight operations in the Cessna 152.