How to Up and down the hinge rotator if they rotate in other side if the down goes up and up goes down if they rotate the rotator is 360° I want to do it in 180° change to up and, the back is down rotor blades just like in a real helicopter in the middle of rotation is what I mean is to reversal rotation just like in helicopter I want you to help me the front goes down and the back goes up

If I pitch The front goes down and the back goes up the hinge rotator and also the roll left and right

EXAMPLE

Look at the main rotor they rotate