Rotating Controls

The rotating controls transfer input from the directional controls to the tail rotor blade assemblies. It provides the movement of the pitch change axis of the tail rotor blade assemblies so the aerodynamic lift force that pushes the tail rotor can be increased or decreased. It consists of the crosshead and the pitch link assemblies.

Crosshead

The crosshead is a stainless steel part installed on the tail rotor control tube of the directional controls and connected to the pitch link assemblies.

Pitch link assembly

There are two pitch link assemblies, both made of aluminum alloy and contain two staked spherical bearings. They connect the crosshead to the pitch horn of the tail rotor blade assemblies.

Operation

During operation of the helicopter, the crosshead transfers linear control inputs from the tail rotor control tube into rotational control inputs to the pitch link assemblies. This rotation gives the necessary angle of attack to the tail rotor blade assemblies and is controlled by the pilot through the anti-torque rotor control.