What is the RPM at which the engine achieves its rated horsepower?

The engine of a Cessna 152 achieves its rated horsepower at 2550 RPM. This is an important operational point because it provides the pilot with a target RPM for maximum power output during various phases of flight, such as takeoff and climb. By operating at this RPM, the engine not only delivers the expected performance but also operates efficiently and reliably within its designed limits.

Understanding the relationship between RPM and horsepower is crucial for pilots when planning and executing maneuvers. It helps in determining the appropriate power settings required for specific flight profiles, ensuring safety and effectiveness in performance. Operating at the correct RPM prevents the engine from being overworked, which could lead to premature wear or failure.

Choosing to operate at or around 2550 RPM when maximum power is needed aligns with the manufacturer's specifications, contributing to both performance optimization and engine longevity.