The linear actuators are designed to provide highly accurate precise positioning for a close loop control with a minimum number of moving parts, which prolong the life of the actuator. The linear actuators provide a quick response time and can be use for different applications. The fast-acting actuator is completely self-contained. It requires only a firm mounting surface, appropriate linkage to the fuel control and electrical connection to the speed control unit. The actuators are not gravity sensitive and therefore can operate in any position. The actuators are compatible with GAC’s standard speed control units.