C34R390M electromechanical gun/turret drive rotary actuator

The C34R390M electromechanical gun/turret drive actuator from Moog is a direct-drive brushless rotary actuator for gun and turret drives on naval systems. Moog designs this series of high-torque rotary actuators for combat turret applications, where the actuator points and stabilizes a weapon mount without a gearbox between the motor and the load. A clutch, a no-back device and a manual drive input are integrated in the same unit.

The actuator serves weapon pointing, stabilization and slewing of turret systems and is built to meet or exceed the demanding requirements of military environments, including the high-salt content of sea air. Moog supplies its electromechanical rotary and linear actuators for system integration, for upgrades from older hydraulic systems and for sustainment service, so the unit fits both fielded and planned turret drives.

The peak torque is 103 Nm, produced by a brushless DC motor whose high torque at low speed allows direct drive. The no-load speed is 390 rpm. For an integrator this removes the gearbox from the drive train, which gives a backlash free coupling, high stiffness and very low drive inertia, all of which support stabilization of the weapon. The mass is 41,000 g. The supply voltage range of 24–650 V lets the actuator be matched to the power bus of the host platform.

Mechanically, a built-in pivot pin with adaptable bushings simplifies installation and adjustment. The mounting schemes and the manual drive configurations are adaptable to the turret, so the housing can be fitted to different gun and turret layouts. The integrated clutch and no-back device work with the manual drive input, and no shift is required to use the manual drive. The datasheet includes architectural and dimensional drawings for envelope planning.

The actuator complies with MIL-STD 810E and MIL-STD 461E. The equipment falls under the jurisdiction of ITAR and requires US Government Authorization for export purposes.

Typical applications are gun, turret and radar drives for naval systems, and combat turret mounts that need weapon pointing, stabilization and improved slew rates. It is also suited to programs that replace hydraulic drives with an electromechanical solution.