seesaw rotor

seesaw rotor
A rotor system in which the blades are fixed to the hub, generally by a teetering or seesaw hinge, allowing the blades to flap and feather but not lead-lag or drag. The rotor pivots on the mast in much the same way a seesaw pivots on its fulcrum. Also called a semirigid rotor.

Aviation dictionary. 2014.

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