What is the diameter of the propeller used in a Cessna 172?

The Cessna 172 typically uses a propeller with a diameter of 76 inches. This size is selected to optimize the performance characteristics of the aircraft, including efficiency during takeoff, climb, and cruise. The 76-inch propeller helps generate the necessary thrust for the aircraft's weight and wing design, contributing to its ability to operate effectively in various flight conditions.

Propellers are sized based on several factors, including the engine power, the aircraft's weight, and the desired flight speed. In the case of the Cessna 172, the 76-inch diameter propeller strikes a balance that enhances the aircraft's performance while maintaining compliance with aviation standards. This choice plays a crucial role in ensuring the aircraft's reliability and safety during operations.