[tasdrouille]

Is the L arm in the same plan as the grille or am I seeing things out of perspective? Something looks wrong in your linkage. That L arm is going to want to bend sideways during operation. I also don't see how it could possibly close the grille shut at speed.

EDIT: Ok, the arm is probably not in the same plan as the grille. It's lined up with the actuator. I still doubt that little actuator will be strong enough, especially since the L arm gives leverage against the actuator.