The invention relates to a gas turbine (10), in particular a jet engine, comprising an intake (11), which supplies air to a compressor (12) for burning with a fuel, whereby a propulsion jet can be produced by the gas turbine, the compressor (12) being arranged on a shaft (15) of the gas turbine (10) for rotation therewith, and comprising a starter arrangement, which has an auxiliary unit (20) designed as an electrical starter/generator, which starts the turbine (10) and drives the compressor (12) by way of the shaft (15) until a minimum rotational speed is reached, a coupling means (30) being provided between an output-side shaft (25) of the auxiliary unit (20) and the shaft (15) of the gas turbine (10) as respective parts to be coupled, which coupling means (30) couples the parts to be coupled contactlessly. It is characteristic of the present invention that one of the parts to be coupled is designed as a magnetic disk (35) with a plurality of magnets (38) and the other part to be coupled is designed as a driver disk (32) of a metal with high electrical conductivity, so that a relative movement of the magnetic disk (35) with respect to the electrically conductive driver disk (32) allows the effect of inducing in the driver disk (32) eddy currents that produce magnetic fields opposed to the outer magnetic field and as a result produce a force effect between the magnetic disk (35) and the driver disk (32).

A hybrid propulsion system extracts electrical power using a combined heat engine and electrical generator. The propulsion system includes a gas generator, an electrical power generator disposed upstream of the gas generator and configured to be driven by a power turbine, an output power shaft mated to the power turbine and extending through a central axis of the gas generator and power generator unit, an engine enclosure circumferentially surrounding the power generator, and a shroud disposed between the power generator and the engine enclosure. The electrical power generator includes at least one rotating member and a stationary conductive member, wherein the at least one rotating member includes a magnetic portion, and rotation of the at least one rotating member relative to stationary conductive member generates a current transmissible by one or more coupled power output cables.

A pump system for pressurizing a fluid within a closed loop supercritical transport bus is disclosed herein. The examples of the pump system disclosed herein include an impeller coupled to an impeller shaft; an axial flux electric motor including rotors and a stator; a rotor shaft connected to the rotors, wherein the rotor shaft is coupled to the impeller shaft; a seal to prevent the fluid from contacting the axial flux electric motor; a first housing to frame the impeller shaft; and a second housing to frame the axial flux electric motor, wherein the second housing is separate from the first housing.