Looking at Tiger right now:
- Don’t rotate root scene component of suspension, just leave it at 0,0,0. Instead rotate the SuspensionArm component.
- Now I see what you mean about suspension arms, that’s an unusual order, I thought that on both side there were bending toward the back of the tank. Here I see that right side bends to a back and left side to the front.
- I’ve set suspension arms to 25 degrees rotation in Y
- For stability of the physics constraints it’s important that connected components have not more than 10 times difference in mass (ideal), unfortunately as we are dealing with tanks we can’t have torsion bars weight a ton each. But something like 100-200 kg might make a trick.
- Projection settings I usually set to 0.1 Linear Tolerance and 1.0 of Angular Tolerance
- The collision components which will come in contact with ground, like Collision Wheels, Idler and Sprocket need to have SmallFrictionMaterial physics material, so they can slide easily over obstacles - it improves stability.
After setting all this, it seams to be working more or less fine. I’ll send you file back with the settings.