Rotating various objects in different axis I am trying to model kind of a helicopter rotor like this 

I would like to make it so that when I open one of the wings, the others open to. I want to make an animation like the wings are closed like this



and then open to the position that they are in the fistr picture, without having to manually rotate them every time. Any help?
You can add a driver to bind their rotation to the position of an empty:


Add an empty:

Right click and Add Single Driver to the appropriate axis of rotation on your blade. Repeat for each blade.

Open the graph editor and define your driver, for each blade:


I made the z location of my empty drive the x rotation of my blades.