Patent ID: 9038940
Filing Date: 2015-05-26
Classification: B64C

Abstract:
1. A rotor system comprising: a mast mounted to an airframe and defining a rotor axis; a hub rotatably mounted to the mast and rotatable with respect to the mast only about the rotor axis, the hub defining a hub cavity; and a plurality of blades mounted to the hub, blade of the plurality of blades defining a duct in fluid communication with the hub cavity, the blade duct being defined by a blade spar of the each blade, the blade spar extending through the hub and into the hub cavity and having a pitch horn secured thereto and positioned within the hub cavity; a swashplate encircling the mast; a plurality actuators coupled to the swashplate and adjusting the position of the swashplate; and a plurality of pitch control rods coupling the swashplate to the pitch horns of the plurality of blades; a shroud encircling the mast and rotatably engaging the hub, the shroud defining an air channel in fluid communication with the cavity, the swashplate being located within the air channel and the plurality of pitch control rods extend into the hub cavity; and a compressed air source in fluid communication with the air channel.