An example system includes a turbine comprising an input port and mechanically coupled to a motor-generator and a compressor and control circuitry configured to determine whether a pressure of a fluid at the input port of the turbine is less than or equal to than a threshold pressure. In response to determining that the pressure of the fluid at the input port of the turbine is less than or equal to the threshold pressure, the control circuitry is configured to cause the motor-generator to operate in motor mode. The motor-generator is configured to be mechanically coupled to the compressor, and the motor-generator is configured to provide mechanical energy to drive the compressor when operating in motor mode.

Turbine engine systems include a core assembly having a compressor section, a burner section, and a turbine section arranged along a shaft, with a core flow path through the turbine engine such that exhaust from the burner section passes through the turbine section and exits through a nozzle. A core condenser is arranged downstream of the turbine section and upstream of the nozzle and configured to condense water from the core flow path. A fuel cell is operably connected to the core assembly. A fuel source is configured to supply a fuel to each of the burner section for combustion and the fuel cell for reaction to generate electricity. At least one electric motor is operably coupled to the core assembly and configured to impart power to a portion of the core assembly and the fuel cell is configured to supply electrical power to the at least one electric motor.

A vertical landing and take-off aircraft VTOL transitions from a vertical takeoff state to a cruise state where the vertical takeoff state uses propellers to generate lift and the cruise state uses wings to generate lift. The aircraft has an M-wing configuration with propellers located on the wingtip nacelles, wing booms, and tail boom. The wing boom and/or the tail boom can include boom control effectors. Hinged control surfaces on the wings, tail boom, and tail tilt during takeoff and landing to yaw the vehicle. The boom control effectors, cruise propellers, stacked propellers, and control surfaces can have different positions during different modes of operation in order to control aircraft movement and mitigate noise generated by the aircraft.

A power system for an aircraft comprises: a first motor-generator component; a second motor-generator component; a common shaft, wherein the first and second motor-generator components are connected to the common shaft in series; and a de-coupler operable to disconnect the first motor-generator component from the common shaft.

A lever for adjusting output of a hybrid-electric powerplant of an aircraft includes a lever configured to move over an overall range of positions. Movement of the lever adjusts the output of the hybrid-electric powerplant between at least two modes of operation. In a first subset of positions within the overall range of positions, the hybrid electric powerplant is configured to operate an engine having a mechanical output, output first electrical energy from a motor/generator driven by the mechanical output of the engine, and drive a propulsion mechanism by the mechanical output of the engine. In a second subset of positions within the overall range of positions, the hybrid electric powerplant is configured to operate the engine having the mechanical output, receive second electrical energy at the motor/generator, drive the mechanical output with the motor/generator using the second electrical energy, and drive the propulsion mechanism by the mechanical output.

A power system for an aircraft comprises: a motor-generator component; a shaft, wherein the motor-generator component is connectable to the shaft, the shaft connectable to an additional component of the aircraft to for torque transfer with the additional component; and a de-coupler operable to disconnect the motor-generator component from the shaft, wherein the motor-generator component is located between the de-coupler and the additional component in use.

A turbine engine assembly includes a core engine that generates an exhaust gas flow, a condenser where water is extracted from the exhaust gas flow, an evaporator where heat is input into the water that is extracted by the condenser to generate a first steam flow, a first steam turbine where the first steam flow is expanded and cooled to generate a first cooled flow, a bypass passage that defines a path for the first steam flow around the first steam turbine, and a superheater where at least one of the first steam flow and the first cooled flow is reheated to generate a second steam flow.

An engine system of an aircraft includes an energy storage system, a gas turbine engine, and a controller. The gas turbine engine includes a low spool, a high spool, a low-spool generator operably coupled to the low spool, and a high-spool electric motor operably coupled to the high spool. The controller is configured to detect a braking condition of the aircraft, transfer power from the low-spool generator to the energy storage system based on the storage capacity state of the energy storage system, and transfer power to the high spool through the high-spool electric motor to support combustion in the gas turbine engine while a rotational speed of the low spool is reduced responsive to the low-spool generator extracting energy from the low spool.

An aircraft propulsion system with an internally cooled electric motor adapted for use in an aerial vehicle. The motor may have its stator towards the center and have an external rotor. The rotor structure may be air cooled and may be a complex structure with an internal lattice adapted for airflow. The stator structure may be liquid cooled and may be a complex structure with an internal lattice adapted for liquid to flow through. A fluid pump may pump a liquid coolant through non-rotating portions of the motor stator and then through heat exchangers cooled in part by air which has flowed through the rotating portions of the motor rotor. The drag reduction portion and the cooled electric motor portion may share the same inlet.

A power management system for an aircraft with a hybrid power source comprises a rechargeable electricity source and an electricity generating source, a detector determining status data of the elements of the aircraft power consumption electrical circuit, and power data relating to the instantaneous electrical power demanded by the aircraft and/or the charging status of the rechargeable electricity sources, an automaton receiving the power data from the detector and determining a control status for the power sources, an adapter determining a backup electrical configuration when the status data indicate a failure, a controller determining an electrical control for the rechargeable electrical source and the electrical generating source based on the instantaneous electrical power demanded, and a switch emitting commands to the switches of the aircraft power consumption electrical circuit to implement a nominal electrical configuration, or, a backup electrical configuration for the adapter in case of receipt thereof.