CATMASTER Ideally it should never happen, but with this design it can't be avoided. On the one hand you need enough lateral thrust to overcome the friction and fully extend the fan, on the other hand when paired with deceleration or turning, the forces should not tear it apart.
The physics engine handles collisions by first allowing interpenetration and then exerting a force that is supposed to push the objects back out of each other. Now the thinner the contact points are (2x1 wedges) and the more objects that are chained together (19), the more likely it is that rounding errors and jitter cause parts to "slip" through each other under strong forces. Keep that in mind when designing moving parts.
