An apparatus for removing magnetic foreign matter includes a magnetic force generator and a magnetic material. The magnetic material is configured to be magnetized by the magnetic force generator and be brought into contact with fluid in a flow path that allows the fluid to flow therethrough.

An apparatus for removing magnetic foreign matter includes a magnetic force generator and a magnetic material. The magnetic material is configured to be magnetized by the magnetic force generator and be brought into contact with fluid in a flow path that allows the fluid to flow therethrough.

The aircraft can have a cabin adapted to receive one or more persons; a rotary airfoil device; an electric engine; a battery powering the electric engine; a transmission coupling the electric engine to the rotary airfoil device; a lubricant subsystem having a lubricant circuit and a lubricant pump operable to circulate a lubricant in the lubricant circuit, the lubricant circuit connected in heat exchange relationship with the transmission; a coolant subsystem having a coolant circuit and a coolant pump operable to circulate a coolant in the coolant circuit, the coolant circuit connected in heat exchange relationship with at least one of the electric engine and the battery; and a pressurized air subsystem having a pressurized air line operable to deliver pressurized air from a pressurized air source to the cabin, the pressurized air line connected in heat exchange relationship with at least one of the coolant circuit and the lubricant circuit.

An aircraft assist system described herein includes an aircraft coupling counterpart attached to a strut of a landing gear of an aircraft, and an assist vehicle. The assist vehicle includes a frame, ground-engaging wheels mounted to the frame, a power source for driving one or more of the ground-engaging wheels, and a vehicle coupling counterpart for engagement with the aircraft coupling counterpart. The aircraft coupling counterpart and the vehicle coupling counterpart define a swivel connection for transferring a propulsive force from the takeoff assist vehicle to the aircraft. The aircraft coupling counterpart is disengageable from the vehicle coupling counterpart by upward movement of the aircraft coupling counterpart relative to the vehicle coupling counterpart.

A rotor of an aircraft electric motor includes a shaft made of a first material, and a conductive assembly made of a second material different from the first material. The shaft includes a shoulder portion, the shoulder portion includes longitudinal notches. The notches include two contiguous notches radially superimposed in the shoulder portion, a first opening on a radially outer face of the shoulder portion, and a second opening connecting the two contiguous notches. The conductive assembly is a one-piece structure including a conductive bar that is positioned in one notch of the notches, and a skin that is fixed on the shoulder portion.

A rotor of an aircraft electric motor includes a shaft made of a first material, and a conductive assembly made of a second material different from the first material. The shaft includes a shoulder portion, the shoulder portion includes longitudinal notches. The notches include two contiguous notches radially superimposed in the shoulder portion, a first opening on a radially outer face of the shoulder portion, and a second opening connecting the two contiguous notches. The conductive assembly is a one-piece structure including a conductive bar that is positioned in one notch of the notches, and a skin that is fixed on the shoulder portion.

A ducted fan device includes: a plurality of fan devices each having a fan configured to be rotated about a first axis to generate an airflow and a cylindrical smaller duct surrounding the fan about the first axis and extending in a first axis direction; and a cylindrical larger duct extending in a second axis direction parallel to the first axis. Each of the fan devices is arranged on an inner side of the larger duct when viewed in the second axis direction. At least a part of the smaller duct is arranged outside the larger duct on an upstream side in a flow direction of an airflow when viewed in a direction orthogonal to the second axis.

An electronic rotor lock that can be implemented within an electric motor system by selecting closing a subset of switches within an inverter of the motor drive system to create a circulatory current path that can generate a force that acts to oppose any external movement of the rotor.

An electronic rotor lock that can be implemented within an electric motor system by selecting closing a subset of switches within an inverter of the motor drive system to create a circulatory current path that can generate a force that acts to oppose any external movement of the rotor.

An electric propulsion device includes a hollow shaft having a shaft flow path, which extends in a direction of an axis, formed therein, a boss portion having a space formed therein, a plurality of blades having a blade flow path, which communicates with the space of the boss portion, formed therein, an electric motor, and a casing having an accommodation space, which communicates with the shaft flow path, formed therein. A suction port is formed to communicate between an outside of the casing and the accommodation space, in a position of the casing between each of the plurality of blades and the electric motor. A blowing port is formed to communicate between the blade flow path and the outside, in a region including an end portion of each of the plurality of blades on an outer side in the radial direction.