The performance or operational information section of the Aircraft Flight Manual/Pilot’s Operating Handbook (AFM/POH) contains the operating data for the aircraft; that is, the data pertaining to takeoff, climb, range, endurance, descent, and landing. The use of this data in flying operations is mandatory for safe and efficient operation. Considerable knowledge and familiarity of the aircraft can be gained by studying this material.
It must be emphasized that the manufacturers’ information and data furnished in the AFM/POH is not standardized. Some provide the data in tabular form, while others use graphs. In addition, the performance data may be presented on the basis of standard atmospheric conditions, pressure altitude, or density altitude. The performance information in the AFM/POH has little or no value unless the user recognizes those variations and makes the necessary adjustments.
To be able to make practical use of the aircraft’s capabilities and limitations, it is essential to understand the significance of the operational data. The pilot must be cognizant of the basis for the performance data, as well as the meanings of the various terms used in expressing performance capabilities and limitations.
Since the characteristics of the atmosphere have a major effect on performance, it is necessary to review two dominant factors—pressure and temperature.
This section discusses the factors that affect aircraft performance, which include the aircraft weight, atmospheric conditions, runway environment, and the fundamental physical laws governing the forces acting on an aircraft. The following topics provide the foundation for understanding and applying aircraft performance data in real-world flight operations.
Aircraft Performance Series
1. Structure of the Atmosphere and Atmospheric Pressure
Learn how atmospheric pressure, temperature, and air density influence aircraft performance.
View Topic →2. Pressure Altitude and Density Altitude
Understand how altitude and air density affect takeoff, climb, cruise, and landing performance.
View Topic →3. Principles of Flight Performance
Explore the aerodynamic and operational factors that determine aircraft performance capabilities.
View Topic →4. Takeoff and Landing Performance
Examine the factors affecting runway requirements and safe takeoff and landing operations.
View Topic →5. Performance Speeds
Learn the critical aircraft speeds used for takeoff, climb, cruise, approach, and landing.
View Topic →6. Performance Charts
Understand how to interpret and apply AFM/POH performance charts for flight planning.
View Topic →