I am trying to decompose a torus in to convex hulls and use them in the "Convex Decomposition" demo that comes with the API.
I made the torus in Blender. I followed all the instructions on how to scale your objects for meters and seconds units scale for Bullet. But when I load the torus in to the demo, then the behavior is very unpredictable. It looks like the torus acts like a feather. I tried increasing the mass of the object with no success.

Can anyone tell me how to scale and set the correct phyical properties for tri meshes which are convex decomposed and used inside Bullet?
I have uploaded a sample torus file that I created in Blender.
Thanks