Abstract: A pneumatic actuated trim tab system adapted to be mounted on a rotor blade to pneumatically alter aerodynamic properties of the rotor blade. The system includes an inflatable diaphragm adapted to be mounted on one or each side of the rotor blade; a deformable plate attached to each of the inflatable diaphragm, such that inflation and deflation of the inflatable diaphragm causes movement of each of the plates; a valving system connected to each inflatable diaphragm to allow input of a fluid into each inflatable diaphragm and allow release of a fluid out of each inflatable diaphragm; and a controller for controlling fluid pressure into and out of each inflatable diaphragm using the valving system.

Abstract: A pneumatic actuator system to provide for actuation of a device on a rotor blade. A high pressure volume unit mounted on the rotor blade, including an air inlet to allow entrance of air into the high pressure volume. At least one actuator on the rotor blade to actuate a device on the rotor blade, where the at least one actuator is connected to the high pressure volume to receive air from the high pressure volume for actuation. An air release unit connected to the at least one actuator to allow release of air from the at least one actuator. An air control unit connected to the high pressure volume unit to control air flow into the at least one actuator and is connected to the air release unit to control release of air from the at least one actuator.