Swept wings are most commonly used for which type of aircraft?

Swept wings are primarily used on high-speed airplanes due to their aerodynamic advantages at higher velocities. The design of swept wings helps to delay the onset of shock waves as the aircraft approaches transonic speeds, which enhances performance and stability during high-speed flight. This wing configuration reduces drag, particularly the drag associated with airflow separation, allowing the aircraft to maintain better control and efficiency at supersonic speeds.

In contrast, other types of aircraft such as small regional planes, gliders, and light sport aircraft typically operate at lower speed regimes where straight wings are more beneficial for generating lift and maintaining stability. These designs are optimized for different flight characteristics that do not require the specialized aerodynamic properties of swept wings. Thus, high-speed airplanes are the most appropriate application for swept wing designs.