Methods and apparatus are provided for limiting the load on a rotor support structure when a rotationally mounted rotor becomes imbalanced. The rotor is rotationally mounted within a plurality of circumferentially spaced variable volume hydraulic fluid receptacles that at least engage the rotor and have hydraulic fluid disposed therein. Each of the variable volume hydraulic fluid receptacles is fluidly connected to a substantially fixed volume hydraulic fluid receptacle that has hydraulic fluid disposed therein and is coupled to the rotor support structure. When the rotor becomes imbalanced, the hydraulic fluid is continuously moved between the variable volume hydraulic fluid receptacles and the substantially fixed volume hydraulic fluid receptacle.