The Triplex Rudder Surface from Moog is a Launch Vehicle Actuator with a horsepower of 2.5 hp and a stall torque of 235 in/lbf. This actuator has a power point of 168 in/lbf (at 5,643 deg/sec) and requires a supply voltage of 270 VDC. It has a mass of 35 lbs and a stroke of 10 revs. It has been used on several launch vehicles such as Antares, Delta IV, Centaur, and Vega.