Which of the listed functions is NOT performed by the engine cowling?

The function of securing the engine to the aircraft airframe is primarily handled by the engine mounts and not by the engine cowling itself. The engine cowling is designed to serve several important roles, such as protecting the engine components from environmental factors, providing an optimal pathway for air intake, and contributing to aerodynamic efficiency by decreasing drag.

The cowling shields the engine components from dirt, debris, and weather elements, which helps in maintaining the performance and reliability of the engine. It also plays a critical role in directing air flow for cooling and combustion processes, ensuring that the engine receives the necessary air for optimal operation. Furthermore, by streamlining the shape of the engine, the cowling helps minimize drag during flight, enhancing the aircraft’s overall performance. However, the structural aspect of engine attachment is not a function of the cowling, as that job falls to the mounts designed specifically for stability and safety.