What is one of the main purposes of installing vortex generators on small general aviation aircraft?

The main purpose of installing vortex generators on small general aviation aircraft is to improve spin recovery characteristics. Vortex generators are small aerodynamic devices placed on the wings or control surfaces of an aircraft. Their function is to create controlled vortices that help maintain airflow over the wings at lower speeds and during high angles of attack, which can be critical in preventing stalling and enhancing control during potentially hazardous maneuvers.

By improving airflow around the wings, vortex generators help to delay airflow separation, thereby improving the aircraft's responsiveness in a stall situation. This enhanced airflow contributes to better stability and control in the spin recovery process, making the aircraft safer and easier to handle in such scenarios.

The other options are not primary functions of vortex generators. While they may indirectly influence aspects such as maintenance costs or passenger capacity through improvements in performance or efficiency, their design is specifically aimed at enhancing aerodynamic characteristics and handling, particularly related to spin recovery and stall behaviors.