How to build this?

mechanical seals bearings, oil. you could use electromagnetics as a bearing, no friiction problems but the power to them should have failsafes, make them superconductive and save on energy. also you could modifiy the electromagnetic bearing to speed up or slow down the torus or toruses. with 2 on the spindle you could have them rotate in counter to each other.
best regards pete
victoriatangoman wrote: For all you engineers. If we want a spaceship with a could rotating torus
section how do we mate it with a non-rotating spindle?

WHat would the structural problems be? How would you insure pressure
worthiness?

Obviously, the rotating section can be encased within a pressure
vessel, like Discovery from 2001:A Space Odyssy. Is this optimum?

Any thoughts?

TangoMan