Upper/Lower swashplate connection

[Cezar11]

Was wondering.... what's the mechanical connection between the upper and lower swashplates of a helo? since the lower one doesn't move and the upper is rotating at the speed of the rotors, and given the force that's needed to change the blade chord angle in the airstream, you'd need a pretty sophisticated, durable, and low friction type of connection.

My first thought was a very high strength ball-bearing joining, but wasn't sure that would be durable enough.

 

Any mechanics want to provide details?

[LongbowDriver]

They're called pitch change links or PC links for short. They are a ball and socket type hinge. It's a very ingenious design.