Riggin of tank chain

Hi there folks,

I am new to the forum and have a tricky problem.

I want to animate a tank chain. I already modeled it with single chain links and a follow path with time offset.
I also managed to let the chain rotate correctly in X direction correctly (so the chain links are sticking at the ground) and also a rotation of the tank itself (one chain rotates in positive direction and the other in negative). I managed this with drivers.
The problem I have now is following:

I want to animate the tank by Keying the location of itself but when I make a rotation in an undefined angle and then drive along the local X axes.

I can’t figure out how to make it. Does anyone know a tutorial or something which could help me?.

Just for information I don’t know anything about the game engine.

I hop anyone can help me.
Thanks Exerkun

this is pretty cool track chain, you maybe have to contact the author of the video

and maybe this will be helpful: