Rotary wing system with a rotating blade rotating about a rotation axis. The system includes a fluid damper with a damper fluid for controlling a troublesome motion. The fluid damper has an inboard end and an outboard end, the damper inboard end attached to a first rotary wing system inboard member proximate the rotation axis and the outboard end attached to a second rotary wing system outboard member distal from the rotation axis. The fluid damper contains a damper fluid volume in at least a first working chamber which is worked by a relative motion between said first rotary wing system inboard member and said second rotary wing system outboard member to control the troublesome motion. The damper includes a volume compensator channel in fluid communication with the damper fluid, the volume compensator channel including a centrifugal force mass member movable along a volume compensating length of the volume compensating channel, wherein a rotation about the rotation axis forces the centrifugal force mass member towards an outboard end of the volume compensating channel and pushes damper fluid from the volume compensator channel towards the at least first working chamber.