Single spool integral rotating mass, the “rotor”. Related to the original question, is it permitted to entertain this rotor as “floating” in its thrust bearings, when the axial aerodynamic loads are equal? (Compressor, Turbine).
I hope not, Bearings floating in their races have a tendency to skid and wear like hell. Simple to just bleed some high pressure air against a rotating diaphragm like the interior of a rotor disk