The following image shows a planetary gear mechanism under a rigid body physics simulation. All gears involved are under a hinge constraint, and the central red gear is also under a motor constraint. The cylinders are used as Object 2 for the corresponding constraints, and marked "passive".
What I need, however, is for the outer (yellow) gear to be stationary and the centers of the satellite gears (blue) to move around the center. But I can't figure out how to rig this correctly.
Can someone please nudge me in the right direction?
Thanks in advance.