Aviation Standard Test Battery-E (ASTB E) Practice Test

What does the term "flight envelope" refer to?

1. The speed limits of an aircraft

2. The range of altitude and angle of attack for stable flight

3. The maximum takeoff weight of an aircraft

4. The types of maneuvers an aircraft can perform

The correct answer is: The range of altitude and angle of attack for stable flight

The term "flight envelope" refers to the range of altitude and angle of attack for stable flight. This concept is crucial in understanding the operational limits of an aircraft, as it encompasses the various conditions under which an aircraft can safely fly without risking loss of control or structural failure. The flight envelope delineates parameters such as the maximum and minimum airspeeds, the maximum altitude, and the corresponding angles of attack where the aircraft can operate effectively and safely. While terms like speed limits, maximum takeoff weight, and maneuverability are all important aspects of aircraft performance, they do not comprehensively define the flight envelope. The flight envelope considers a broader range of operational limits, making it essential for pilots and engineers to reference when assessing the performance and safety of an aircraft throughout different phases of flight.