What is the main function of a spar in aircraft wings?

The main function of a spar in aircraft wings is to provide main structural support for the wing. Spars are the primary structural elements that run longitudinally through the wing and bear the loads acting on it during flight, such as aerodynamic forces and weight from the wing structure and any attached components. They are pivotal in maintaining the integrity and shape of the wing, allowing it to withstand various stresses while ensuring stability and performance.

Unlike other components, which may contribute to aspects like airflow or aerodynamic performance, the spar's primary role is to ensure the wing can handle both static and dynamic loads efficiently. By doing so, it allows the wing to maintain its functionality and safety during various flight conditions. This structural support is essential for the aircraft's overall performance and its ability to operate safely within its design limits.