With ailerons, you have one aileron goes down and one goes up and what that does is redistribute the lift on the wing, ... The downgoing aileron increases the lift, the upgoing decreases the lift but the overall lift of the airplane is unchanged.  -   Don Kennedy     Quotes
With ailerons, you have one aileron goes down and one goes up and what that does is redistribute the lift on the wing, ... The downgoing aileron increases the lift, the upgoing decreases the lift but the overall lift of the airplane is unchanged. Don Kennedy
 Airplane And Aviation