A method of forming a blade outer air seal includes applying a cavity layer that has a plurality of cavities to a radially inner side of a seal body. The cavity layer is coated with an abradable coating.

A pair of slide components (4, 7) have sliding faces (S) sliding relative to each other, and a sealed fluid-side periphery (16) and a leakage-side periphery (15). The sliding face (S) of at least one slide component includes: a fluid introduction groove (13) in communication with the sealed fluid-side periphery (16); a first pressure generation mechanism (12) of which one end is in communication with the fluid introduction groove (13) and the other end is surrounded by a land portion (R1); and a second pressure generation mechanism (11) of which one end is in communication with the leakage-side periphery (15) and the other end is surrounded by an annular land portion (R2). The fluid introduction groove (13) and the other end (12e) of the first pressure generation mechanism (12) include overlapping portions (Lp) overlapping circumferentially. The slide components can exhibit sealing performance and lubricity regardless of rotating direction.

A vane includes an airfoil that defines a leading edge, a trailing edge, a pressure side, and a suction side. The airfoil includes a truss structure that has ribs that define there between a plurality of through-cavities from the pressure side to the suction side. Honeycomb cells are disposed in the cavities. A face sheet defines at least one of the pressure side or the suction side. The face sheet has perforations that correspond in location to the honeycomb cells.

A centrifugal compressor comprises an impeller including a hub and a plurality of blades. The hub is provided with a through hole. The hub has an external radial surface having an inner external radial surface and an outer external radial surface. The outer external radial surface is formed closer to a back surface than an imaginary curved surface having as a radius a radius of curvature of the inner external radial surface at a radially outer edge thereof.

A system for dampening noise generated by a gas turbine engine is disclosed. In various embodiments, the system includes a fan exit guide vane having a leading edge, a trailing edge and a pocket that extends in a chordwise direction between the leading edge and the trailing edge; and an acoustic panel configured to be received within the pocket, the acoustic panel including a back sheet, a face sheet and a core disposed between the back sheet and the face sheet, the core having a first cavity extending between a first wall and a second wall and a second cavity disposed within the first cavity.

A rotor for use in a gas turbine engine includes a wheel and a plurality of blades. The wheel is arrange about an axis of the gas turbine engine for rotation. The plurality of blades are arranged around the wheel and extend radially outward from the wheel to interact with gases flowing through the engine. One or more of the plurlaty of blades is formed to include a hole that extends into an external surface of the blade and a plug located in the first hole. The blade and the plug are made of different materials or have different densities to vary the frequency response of the blade.

The bearing chamber assembly can have a bearing chamber wall extending annularly and having a drain aperture, the drain aperture connecting a scavenge line, and a baffle, the baffle having an apertured sheet connected at one end to the bearing chamber wall, extending from the connected end over and past the scavenge port to a free edge, the free edge spaced from the bearing chamber wall.

Aircraft fuel ice capturing filter device housings, aircraft fuel ice capturing filter devices, and methods of use are provided.

A face sheet of an acoustic liner for a gas turbine engine, having: a first surface, a second surface, and a sheet body extending from the first surface to the second surface; a forward end, an aft end, and the sheet body extending from the forward end to the aft end; and a hole formed in the sheet body, extending from the first surface to the second surface, the hole defining a hole opening at the first surface of the face sheet, and an elongated edge that extends aft at the hole opening, wherein the elongated edge defines a flow ramp surface that tapers toward the first surface and is configured to direct flow toward the first surface, wherein the flow ramp surface is a streamlining feature.

A portable and wearable hand-grasp neuro-orthosis is configured for use in a home environment to restore volitionally controlled grasp functions for a subject with a cervical spinal cord injury (SCI). The neuro-orthosis may include: a wearable sleeve with electrodes; electronics for operating the wearable sleeve to perform functional electrical stimulation (FES) and electromyography (EMG), the electronics configured for mounting on a wheelchair; and a controller configured for mounting on a wheelchair. The controller controls the electronics to read EMG via the sleeve, decode the read EMG to determine an intent of the user, and operate the electronics to apply FES via the sleeve to implement the intent of the user. The neuro-orthosis may restore hand function. The controller may include a display arranged to be viewed by the subject, for example mounted on an articulated arm attached to the wheelchair.