@Topknot: The wobbly wheels issue is a common symptom in ODE. It usually only affects the rear wheels at high rotation speeds. In the car demos, the speed of 30 is quite high if it were converted to real world speed.
The cause of the problem is the joint that holds the wheels. When the wheel rotates at very high speeds, the joint starts to break away. I've not seen any info available that gives guidelines for a solution to the problem. But there are many gotchas to watch out for:
Too much friction
Not enough ERP
Too much CFM
Too much mass pressure on the joint
Not enough wheel mass
Time steps are set too high
I've had varying degrees of success with other methods, but I'm still looking for the perfect solution. I do have a new idea which I'm going to experiment with, but it's more complicated than using single joints for the wheels. It involves changing the Hinge2 joint for a Hinge joint and a separate suspension unit.
The cause of the problem is the joint that holds the wheels. When the wheel rotates at very high speeds, the joint starts to break away. I've not seen any info available that gives guidelines for a solution to the problem. But there are many gotchas to watch out for:
Too much friction
Not enough ERP
Too much CFM
Too much mass pressure on the joint
Not enough wheel mass
Time steps are set too high
I've had varying degrees of success with other methods, but I'm still looking for the perfect solution. I do have a new idea which I'm going to experiment with, but it's more complicated than using single joints for the wheels. It involves changing the Hinge2 joint for a Hinge joint and a separate suspension unit.