CrazyFlie2 COLLADA mesh not loaded properly

[stephane-caron]

I'm not sure whether the issue comes from yourdfpy or one of its dependencies, but the CrazyFlie2 URDF does not load properly.

The URDF has a single Collada mesh, here it is loaded by Blender (left) and yourdfpy 0.0.52 (right):

In yourdfpy, three out of four propellers are missing.