Patent ID: 6196796
Filing Date: 2001-03-06
Classification: B64C,Y02T

Abstract:
An actuator for actuating a flap in an active rotor control system, the flap being mounted on a trailing edge of a helicopter rotor blade, the actuator connected to a first fluid supply line for providing a first flow of pressurized fluid from a fluid supply, and to a second fluid supply line for conveying a second flow of pressurized fluid from the fluid supply, a controller for actively driving the actuator by controlling the supplying of fluid from the fluid supply, the actuator comprising:a housing mounted within the trailing edge of a rotor blade, the housing having a channel formed within it;a butterfly shaft pivotally mounted within the channel, the butterfly shaft having laterally extending arms which separate the channel into four lobes;a first port adapted to receive a flow of fluid from a first fluid supply line, the first port fluidly communicating with two diametrically opposed lobes in the channel; anda second port adapted to receive a flow of fluid from a second fluid supply line, the second port fluidly communicating with the other two diametrically opposed lobes in the channel.