This morn we posted Orion's answer to the Halo: the spinning wheel is supported by a nonspinning magnetic shell. Like a lobster is boiled in its own shell.
You see, the older, simpler, thicker shell can offer something Elliot Orion Ruzicka hasn't considered: heat exchange. The outer shell gets outfacing radiators pointing in any direction. But... if there's a vacuum between the habitat and the outer shell, how's the habitat getting its heat to the outer shell?
Perhaps the separative medium is an efficiently-conductive gas. Like hydrogen. Superheated hydrogen between our oxygen-infused habitat and the outer shell, which spin we maintain by some turbine in the hub of the spokes. Oh the humanity.
Nah. The outer shell has to be a half shell, reflective on the outside. The radiators are then attached to the inner shell orthogonal to the direction of spin, or maybe tilted slightly outward.
AUXILLIARY 7/18: The inner (spinning) shell gets, outfacing, thick conductive pipes running through vacuum to the outer (slower-spinning) shell which inner layer is a pool of that convective fluid. I got some help from Copilot here but: the pipes are not cables; they too hold fluid. Copilot for coolant here wants me to use gallium or sodium-potassium eutectites, so here we "just" have to keep it from leaking into the magnets (the overall load-bearing structure is probably just another weave of anhydrous and rubble but, as noted, here we don't have to bear as much).
As they say, amateurs study engineering; professionals study thermodynamics.
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