Blade-pitch control system with indexing swashplate

摘要

The present application includes a blade-pitch control system with an indexing swashplate. A swashplate assembly (33) has a non-rotating portion (35) and a rotating portion (37) and an indexing portion (45) of the mast (17). The swashplate assembly (33) is translatably affixed to the indexing portion (45). A pitch link (31) connects the rotating portion (37) of the swashplate assembly (33) to each blade (27). Translation of the swashplate assembly (33) along the indexing portion (45) causes a change in pitch of the blades (27) and a corresponding indexing of the rotating portion (37) of the swashplate assembly (33) relative to the mast (17), the indexing causing a change in an angular orientation of each pitch link (31), thus providing for selected pitch-flap coupling between flapping motion of the yoke (13) and pitch motion of the blades (27).