Claverham’s long experience of safety critical design of airframe equipment has been successfully applied to engine applications. An outstanding example was our support of Boeing’s X35 B programme. Claverham provided 12 types of servo actuator, which controlled critical elements of the propulsion system, including the Pitch and Yaw Valves and the Lift Nozzle Shut-Off Valve. In collaboration with Hamilton Sundstrand, we are now focussing our interest in applying EMA (electro-mechanical actuation) technologies to an increasing range of guide vane and air control valves for engine and ECS (Environmental Control System) operation. The integrity of DDV (Direct Drive Valve) technology also lends itself to control of critical fueldraulic actuators.