A control augmentation system adapted for use in high aspect ratio aircraft, the control system of the type_comprising: left spoiler, right spoiler, and flap or flaperon, servo drivers; aileron and throttle position sensors (214, 212); a spoiler control input and a flap selector input; and a controller coupled to control the spoiler and flap servo drivers, the control augmentation system being characterized by comprising a mode switch having at least a manual mode and an auto-landing mode; the controller coupled to the aileron and throttle position sensors (214, 212) and the mode switch, and comprising at least one processor having a memory, the memory containing firmware comprising machine readable instructions configured to: read the mode switch; when the mode switch is in the manual mode, sense a position of a spoiler control through the spoiler control input and configure the left and right spoiler servo drivers to drive both left and right spoilers to a symmetrical position determined by a spoiler control; when the mode switch is in the auto-landing mode, configure the spoiler servo drivers to drive the left spoiler servo to a left spoiler position dependent on aileron and throttle position and the right spoiler servo to a right spoiler position dependent on aileron and throttle position, the left and right spoiler positions differing whenever the aileron position is not centered, and an average of the spoiler positions being more fully deployed when the throttle position is at a low-power setting than when the throttle position is at a high-power setting. left spoiler, right spoiler, and flap or flaperon, servo drivers; aileron and throttle position sensors (214, 212); a spoiler control input and a flap selector input; and a controller coupled to control the spoiler and flap servo drivers, the control augmentation system being characterized by comprising a mode switch having at least a manual mode and an auto-landing mode; the controller coupled to the aileron and throttle position sensors (214, 212) and the mode switch, and comprising at least one processor having a memory, the memory containing firmware comprising machine readable instructions configured to: read the mode switch; when the mode switch is in the manual mode, sense a position of a spoiler control through the spoiler control input and configure the left and right spoiler servo drivers to drive both left and right spoilers to a symmetrical position determined by a spoiler control; when the mode switch is in the auto-landing mode, configure the spoiler servo drivers to drive the left spoiler servo to a left spoiler position dependent on aileron and throttle position and the right spoiler servo to a right spoiler position dependent on aileron and throttle position, the left and right spoiler positions differing whenever the aileron position is not centered, and an average of the spoiler positions being more fully deployed when the throttle position is at a low-power setting than when the throttle position is at a high-power setting. read the mode switch; when the mode switch is in the manual mode, sense a position of a spoiler control through the spoiler control input and configure the left and right spoiler servo drivers to drive both left and right spoilers to a symmetrical position determined by a spoiler control; when the mode switch is in the auto-landing mode, configure the spoiler servo drivers to drive the left spoiler servo to a left spoiler position dependent on aileron and throttle position and the right spoiler servo to a right spoiler position dependent on aileron and throttle position, the left and right spoiler positions differing whenever the aileron position is not centered, and an average of the spoiler positions being more fully deployed when the throttle position is at a low-power setting than when the throttle position is at a high-power setting.