Dual mode rotor hub assembly

摘要

A rotor hub assembly (103, 203, 301) and method for controlling movement of a rotor blade (107, 303) relative to a swashplate (305). The hub assembly having an attachment device (315) operably associated with the rotor blade and the swashplate. The attachment device provides pivot and rotational blade movement relative to the swashplate. A dual spring-rate damper (321, 323) is operably associated with the attachment device. The damper (321, 323) switches between a first spring rate and a second spring rate during flight to control movement of the rotor blade. The method includes the process of switching the damper between the first spring rate and the second spring rate during flight.