On the outside of the V-22s rotor fairings there seems to be some kind of hinged weights directly opposite of each of the three rotor blades. Does anybody know what their purpose is?enter image description here

  • $\begingroup$ They appear to move from side to side in that curved slot, either passively or by actuation, so they are likely used to control vibration/harmonics in some way by offsetting the center of mass of the hub. That kind of thing looks like a bandaid, developed to fix a problem to avoid a bigger redesign. $\endgroup$
    – John K
    Commented Oct 10, 2022 at 19:46
  • $\begingroup$ And also with that aerodynamic shape I expect that they rotate to align with the local airflow. $\endgroup$
    – Jim
    Commented Oct 10, 2022 at 20:26
  • $\begingroup$ If I were to take an educated guess I might say they are counterweights to provide a countervailing force that drives the blades to a safe pitch angle in case of actuator failure. $\endgroup$ Commented Oct 11, 2022 at 16:42


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