Exactly what sortof airplane is this? If it is a typical fixed wing airplane then the flaperons arent really necessary. Plus if you are running 1 aileron servo you cant use the flaperon function. Have to have 2 seperate servos on 2 separate channels.

Flaperons allow your ailerons to work as ailerons AND flaps at the same time for landing. Most model airplanes dont need flaps to land. The bulk of people using the flaperon function is it for some 3D aerobatic like waterfalls.