A rotary actuator having a longitudinal axis that is a rotation axis, said longitudinal axis extending between a left-hand side and a right-hand side of the actuator, the rotary actuator comprising: a left shaft projecting out towards a left-hand side of the rotary actuator; a left electric motor operably connected to the left shaft, such that the left electric motor rotates the left shaft; a right shaft projecting out towards a right-hand side of the rotary actuator; and a right electric motor operably connected to the right shaft, such that the right electric motor rotates the right shaft; and characterized by an actuator housing operably connected to the right shaft, such that the actuator housing rotates when the right shaft rotates; a left outer actuator shaft operably connected to the actuator housing, such that the left outer actuator shaft rotates when the actuator housing rotates; a left inner actuator shaft operably connected to the left shaft, such that the left inner actuator shaft rotates when the left shaft rotates, wherein the left inner actuator shaft is located within the left outer actuator shaft; and an output gearbox comprising: a ring gear rigidly connected to the left outer actuator shaft, such that the ring gear rotates when the left outer actuator shaft rotates; a center gear located within the ring gear, the center gear being operably connected to the left inner actuator shaft, such that the center gear rotates when the left inner actuator shaft rotates; a planetary gear interposed between the ring gear and the center gear, the planetary gear meshing with the ring gear and the center gear, such that the planetary gear rotates when at least one of the ring gear and the center gear rotates; and an actuator stub operably connected to the planetary gear, such that the actuator stub rotates with the planetary gear. a left shaft projecting out towards a left-hand side of the rotary actuator; a left electric motor operably connected to the left shaft, such that the left electric motor rotates the left shaft; a right shaft projecting out towards a right-hand side of the rotary actuator; and a right electric motor operably connected to the right shaft, such that the right electric motor rotates the right shaft; and characterized by an actuator housing operably connected to the right shaft, such that the actuator housing rotates when the right shaft rotates; a left outer actuator shaft operably connected to the actuator housing, such that the left outer actuator shaft rotates when the actuator housing rotates; a left inner actuator shaft operably connected to the left shaft, such that the left inner actuator shaft rotates when the left shaft rotates, wherein the left inner actuator shaft is located within the left outer actuator shaft; and an output gearbox comprising: a ring gear rigidly connected to the left outer actuator shaft, such that the ring gear rotates when the left outer actuator shaft rotates; a center gear located within the ring gear, the center gear being operably connected to the left inner actuator shaft, such that the center gear rotates when the left inner actuator shaft rotates; a planetary gear interposed between the ring gear and the center gear, the planetary gear meshing with the ring gear and the center gear, such that the planetary gear rotates when at least one of the ring gear and the center gear rotates; and an actuator stub operably connected to the planetary gear, such that the actuator stub rotates with the planetary gear. a ring gear rigidly connected to the left outer actuator shaft, such that the ring gear rotates when the left outer actuator shaft rotates; a center gear located within the ring gear, the center gear being operably connected to the left inner actuator shaft, such that the center gear rotates when the left inner actuator shaft rotates; a planetary gear interposed between the ring gear and the center gear, the planetary gear meshing with the ring gear and the center gear, such that the planetary gear rotates when at least one of the ring gear and the center gear rotates; and an actuator stub operably connected to the planetary gear, such that the actuator stub rotates with the planetary gear.