It is standard practice on many older types of aircraft to rig with aileron droop, particularly with cable operated control systems. For example, in older Piper manuals it is recommended to rig the ailerons approximately 1/4" to 3/8" of an inch lower than the wing at the trailing edge so that the air flow will lift them up to the neutral position. This is not the result of slack in the cables or free play anywhere in the system, and it is virtually unrelated to the weight of the ailerons. The cables stretch in flight due to aerodynamic lift regardless of being tensioned correctly, and the recommended practice makes them fair to the wing in flight. For a higher speed plane a stiffer control circuit might be necessary to prevent flutter but these are not high speed planes and the design and rigging recommendation works fine.
Last edited by Silvaire1; 5th December 2023 at 04:10.