An electric engine for a vertical takeoff-and-landing aircraft comprising an electric motor assembly including a stator and a rotor. The electric engine may comprise an inverter assembly, a gearbox assembly including a sun gear, and a main shaft including a length of the main shaft that extends from a first end of the main shaft through the gearbox assembly and through the electric motor assembly to a second end of the main shaft. The electric engine may include a hydrodynamic bearing located between the main shaft and sun gear, and a bearing including an inner race mechanically coupled to the main shaft and an outer race mechanically coupled to the rotor. The electric engine may include a bearing including an outer race mechanically coupled to an inner surface of the rotor.

An electric engine for a vertical takeoff-and-landing aircraft comprising an electric motor assembly including a stator and a rotor. The electric engine may comprise an inverter assembly, a gearbox assembly including a sun gear, and a main shaft including a length of the main shaft that extends from a first end of the main shaft through the gearbox assembly and through the electric motor assembly to a second end of the main shaft. The electric engine may include a hydrodynamic bearing located between the main shaft and sun gear, and a bearing including an inner race mechanically coupled to the main shaft and an outer race mechanically coupled to the rotor. The electric engine may include a bearing including an outer race mechanically coupled to an inner surface of the rotor.

Embodiments include an aircraft comprising a fuselage; a wing connected to the fuselage; and first and second propulsion systems connected to the wing on opposite sides of the fuselage, wherein at least a portion of each of the first and second propulsion systems and at least a portion of the wing are tiltable between a first position in which the aircraft is in a hover mode and a second position in which the aircraft is in a cruise mode, wherein each of the propulsion systems includes pylon and a rotor assembly comprising a plurality of rotor blades.

Embodiments include an aircraft comprising a fuselage; a wing connected to the fuselage; and first and second propulsion systems connected to the wing on opposite sides of the fuselage, wherein at least a portion of each of the first and second propulsion systems and at least a portion of the wing are tiltable between a first position in which the aircraft is in a hover mode and a second position in which the aircraft is in a cruise mode, wherein each of the propulsion systems includes pylon and a rotor assembly comprising a plurality of rotor blades.

An articulating motor mount assembly including a first frame segment attachable to an airframe of an aircraft. A second frame segment is rotatably coupled to the first frame segment in a plane oblique to a longitudinal axis of the first frame segment. A third frame segment is rotatably coupled to the second frame segment in a plane oblique to a longitudinal axis of the second frame segment and configured to carry a thrust device. A first actuator is positioned to rotate the second frame segment relative to the first frame segment and a second actuator is positioned to rotate the third frame segment relative to the second frame segment.

An articulating motor mount assembly including a first frame segment attachable to an airframe of an aircraft. A second frame segment is rotatably coupled to the first frame segment in a plane oblique to a longitudinal axis of the first frame segment. A third frame segment is rotatably coupled to the second frame segment in a plane oblique to a longitudinal axis of the second frame segment and configured to carry a thrust device. A first actuator is positioned to rotate the second frame segment relative to the first frame segment and a second actuator is positioned to rotate the third frame segment relative to the second frame segment.

A peripheral propulsion system having a propulsion unit, an upper section, and a lower section. The propulsion unit has a motor, a motor engagement section, an extension coupled to the motor engagement section, and two or more blades coupled to the extension. The extension is located between the upper section and the lower section. The output section is located about at least a portion of the lower section, and the two or more blades are located outside a periphery of the vehicle. When the motor is running, the two or more blades are capable of drawing fluid from about the periphery of the vehicle and through the output section.

An apparatus for guiding a transition between flight modes of an electric aircraft is illustrated. The apparatus comprises at least a sensor configured to detect a movement datum of the electric aircraft and a flight controller communicatively connected to the at least sensor, wherein the flight controller is configured to receive the movement datum from the at least a sensor, determine a current flight mode of the electric aircraft as a function of the movement datum, generate a guidance datum as a function of a change in flight mode and the movement datum, communicate the movement datum and the guidance datum to a pilot indicator in communication with the flight controller, and display the movement datum and the guidance datum using the pilot indicator.

An apparatus for guiding a transition between flight modes of an electric aircraft is illustrated. The apparatus comprises at least a sensor configured to detect a movement datum of the electric aircraft and a flight controller communicatively connected to the at least sensor, wherein the flight controller is configured to receive the movement datum from the at least a sensor, determine a current flight mode of the electric aircraft as a function of the movement datum, generate a guidance datum as a function of a change in flight mode and the movement datum, communicate the movement datum and the guidance datum to a pilot indicator in communication with the flight controller, and display the movement datum and the guidance datum using the pilot indicator.

A propulsion system, comprising: a motor assembly including a stator and a rotor, a heat exchanger configured to receive air to cool a liquid, and a thermal plate including one or more channels configured to convey the liquid from the heat exchanger to the motor assembly. The heat exchanger is mechanically and fluidically coupled to the thermal plate.