PhysX.NET beginner problem: not a smooth roll.. why?

What should i do to make it smoother? I'm working on a physx based railway simulator. First i have to learn physx. Tutorials, documentations appreciated.
Reds are convex meshes to simulate collision. Rails are static, can't move them. Wheels have to run on the two rails. Moving effect made with adding more and more LinearVelocity.

Category:

Science & Technology

Tags:

• physx
• xna
• c#
• roll
• convex