Abstract: An apparatus for fabricating a part, comprising a curved shaft; a build plate connected to the curved shaft; a motor; and a transmission connecting the motor and the curved shaft. The build plate moves along a curved path having a radius of curvature originating on an axis when the transmission transfers power from the motor to the curved shaft. Material deposited on the build plate along the curved path forms the part comprising a solid of revolution around the axis. In one or more examples, the part is an aircraft engine inlet.

Abstract: A metallic structure includes a metallic sheet, including a metallic-sheet first surface and a metallic-sheet second surface. The metallic structure includes a metallic doubler, extending from the metallic-sheet first surface, and a first junction between the metallic-sheet first surface and the metallic doubler. The metallic structure includes a metallic article, extending from the metallic-sheet second surface, and a second junction between the metallic-sheet second surface and the metallic article. The first junction has a first-junction boundary. The second junction has a second-junction boundary. When viewed at any point along the second-junction boundary in a direction, perpendicular to the metallic-sheet first surface, the second-junction boundary does not extend outside of the first-junction boundary.

Abstract: An apparatus for fabricating a part, comprising a curved shaft; a build plate connected to the curved shaft; a motor; and a transmission connecting the motor and the curved shaft. The build plate moves along a curved path having a radius of curvature originating on an axis when the transmission transfers power from the motor to the curved shaft. Material deposited on the build plate along the curved path forms the part comprising a solid of revolution around the axis. In one or more examples, the part is an aircraft engine inlet.

Abstract: An apparatus for fabricating a part, comprising a curved shaft; a build plate connected to the curved shaft; a motor; and a transmission connecting the motor and the curved shaft. The build plate moves along a curved path having a radius of curvature originating on an axis when the transmission transfers power from the motor to the curved shaft. Material deposited on the build plate along the curved path forms the part comprising a solid of revolution around the axis. In one or more examples, the part is an aircraft engine inlet.

Abstract: An apparatus for fabricating a part, comprising a curved shaft; a build plate connected to the curved shaft; a motor; and a transmission connecting the motor and the curved shaft. The build plate moves along a curved path having a radius of curvature originating on an axis when the transmission transfers power from the motor to the curved shaft. Material deposited on the build plate along the curved path forms the part comprising a solid of revolution around the axis. In one or more examples, the part is an aircraft engine inlet.

Abstract: A construction of a nacelle inlet aft bulkhead has a curved or angled cross-section configuration between a connection of an outer edge of the aft bulkhead to an outer barrel of the nacelle inlet and a connection of an inner edge of the aft bulkhead to an inner barrel of the nacelle inlet. The curved or angled cross-section configuration of the aft bulkhead gives the bulkhead flexibility to avoid serious damage to the bulkhead in high load cases such as an fan blade off event. The curved or angled cross-section configuration also removes the need for a spring ring attached between the aft bulkhead and the inner barrel of the nacelle inlet. The curved or angled cross-section configuration also provides design flexibility to terminate the outer barrel of the nacelle inlet at an optimized location rearwardly to increase laminar air flow over the nacelle and reduce drag.

Abstract: A method and apparatus comprising a sleeve, at least one linear electric motor connected to the sleeve, and a controller. The sleeve is configured to move between a first position and a second position. The sleeve exposes a cascade when in the second position. The at least one linear electric motor is configured to move the sleeve between the first position and the second position. The controller is configured to control operation of the at least one linear electric motor to move the sleeve between the first position and the second position.

Abstract: A method and apparatus comprising a sleeve, at least one linear electric motor connected to the sleeve, and a controller. The sleeve is configured to move between a first position and a second position. The sleeve exposes a cascade when in the second position. The at least one linear electric motor is configured to move the sleeve between the first position and the second position. The controller is configured to control operation of the at least one linear electric motor to move the sleeve between the first position and the second position.