Rotary Mechanical Actuators

Geared Mechanical Actuators are used as a mechanism to translate mechanical motion (often rotary) into rotary motion at a different combination of speed and force or change the direction of motion.  Unlike hydraulic or electromechanical actuators, they derive their power from an external source.

Moog’s heritage covers the widest range of designs including hinge-line and simple or compound planetary designs.  Hinge-line actuators, most commonly found in military leading-edge applications use compound differential gearing to provide high-torque low-speed power transmission connecting the flap surface to the spar.  

Simple planetary actuators, most commonly found in commercial leading-edge slat applications are bolted to structure driving rack and pinions to translate the slat surface.  Compound differential planetary actuators, most commonly used in trailing edge flap designs, offer higher ratios for torque multiplication driving rack and pinions to translate the flap surface.  Simple and compound planetary transmissions can incorporate no-back and/or torque-limiting functions.