In the May 25, 1909 issue of Britain’s The Aero, a caption referred to “The ailerons or small planes ... envision combining wing warping with a rudder to counteract differential drag ...

The plane's auto-pilot system or a pilot will constantly adjust the angles of the ailerons, elevators, and rudder to the varying conditions to keep the plane stable, in a process known as trimming.

Most RC planes follow a simple control scheme: elevators for pitch, rudder for yaw, and ailerons for roll. This one-to-one mapping keeps things straightforward, and fewer actuators means less weight.