An actuator system for a flight control surface of an aerial vehicle includes a differential gear set having a first sun gear, a second sun gear and at least one planet gear to directly drive the flight control surface. The actuator system includes a first electric servomotor coupled to the aerial vehicle, and the first electric servomotor drives the first sun gear to drive the at least one planet gear. The actuator system includes a second electric servomotor coupled to the aerial vehicle, and the second electric servomotor drives the second sun gear to drive the at least one planet gear such that the first electric servomotor and the second electric servomotor cooperate to rotate the flight control surface relative to the aerial vehicle by producing a single rotary output.