Abstract: A turbine generator uses a common bearing carrier to support a high-speed spool and a low-speed spool, thereby enabling a more axially compact turbine generator design. The high-speed spool includes a high-speed compressor assembly mechanically powered by a high-speed turbine, which receives power from a combustion chamber between the high-speed turbine and the high-speed compressor assembly. The low-speed spool includes a pre-combustion power turbine aerodynamically powered by the compressor assembly and upstream of the combustion chamber. The pre-combustion turbine mechanically powers an electrical generator, which includes coreless stators and a rotor assembly. The stators have a planar configuration to receive axial flux from magnets of the rotor assembly. Optionally, the low-speed spool may include a post-combustion turbine that is arranged downstream of the combustion chamber and that mechanically powers the electrical generator.