system is called the feathering hinge about the feathering axis. This hinge is responsible for the change in pitch of rotor blades excited via pilot input to the collective or cyclic.

A variation of the fully articulated system is the soft-in-plane rotor system. This type of rotor can be found on several aircraft produced by Bell Helicopter, such as the OH-58D Kiowa Warrior and 429 GlobalRanger. Each blade has the ability to flap and hunt independently