Well what exactly goes on is a airbus secret haha.

 

But as mentioned above the ELAC are master computers. Them and the 3 SEC are controlling the elevators only sending ARINC signals to the actuators on the elevator, 2 on each side.

When one elevator is used the other one function as a damper. Damper means to make the movements calm and can be used when there is turbulence.

 

So the elevators are hydraulic operated with a ARINC signal to command them. All the actuators only have electric plugs and hydraulic lines, that is it. No cables.

 

Jesper 

Thanks, so what is the difference with the ailerons or the spoilers? Is it a difference signal?

Or is it the same concept?

It is all same concept. The computers decide what to use and when.

 

This is all programmed into the flight envelope. Like low speed you need more spoiler together with the ailerons and higher speed less or none.

All is controlled by ARINC signals to the actuators.

 

Jesper