Abstract: A blower case configured to accommodate an impeller and a bracket attached to an outer periphery of the blower case and configured to fix the blower device at a mounting target are included. At an outer peripheral surface of the blower case, a pair of rail parts extending in a direction of a rotation axis of the impeller and an engagement rib connecting the rail parts to each other at an intermediate portion in a longitudinal direction of the rail parts are provided. At the bracket, a pair of grooves fitted with the pair of rail parts and slidable in the direction of the rotation axis and a claw part disposed between the pair of grooves so as to be engaged with the engagement rib in the direction of the rotation axis are provided. A plurality of pairs of rail parts are provided along the outer periphery of the blower case, and the bracket can be selectively attached to the pair of rail parts.

Abstract: A variable pitch aircraft propeller assembly includes: a plurality of propeller blades and at least one counter-weight arrangement mounted on a propeller blade. The counter-weight arrangement comprises: a first counter-weight and a second counter-weight. The counter-weights are arranged such that when the propeller blade is in fine pitch, the counter-weights are in a first position with respect to the plane of rotation of said propeller blade, and when the propeller blade is substantially feathered, the counter-weights are in a second position with respect to the plane of rotation of said propeller blade. The counter-weights are aligned such that a line drawn between the center of mass of the first counter-weight and the center of mass of the second counter-weight is substantially perpendicular to a longitudinal axis of the propeller blade.

Abstract: An airfoil includes an airfoil body having a leading edge, a trailing edge, a suction side extending between the leading edge and the trailing edge, and a pressure side extending between the leading edge and the trailing edge. The airfoil body defines a chamber. The airfoil further includes an impingement cooling structure that is positioned within the chamber. The impingement cooling structure includes an impingement wall spaced apart from the airfoil body such that a post-impingement cavity is defined between the impingement wall and the airfoil body. The impingement cooling structure further includes a plurality of flex elements that extend from the impingement wall. Two or more flex elements are joined together at a junction. The impingement cooling structure further includes a compliance structure that is positioned at the junction and extends from to the two or more flex elements.

Abstract: The present disclosure generally relates to a mounting device for mounting a fan unit. The mounting device may include a reference plane and a reference axis normal to the reference plane, the fan unit in a disengaged orientation being receivable towards the reference plane along the reference axis. The device may also include a set of engagement members radially disposed around the reference axis and arranged to surround the fan unit in the disengaged orientation at the reference plane, the engagement members engageable with the fan unit upon actuation of the fan unit planarly along the reference plane from the disengaged orientation to an engaged orientation.

Abstract: A laser processing machine includes a lens for condensing a laser beam, an actuator changing a relative position between the lens and a workpiece to change a focal position of the laser beam, a protective glass disposed between the lens and the workpiece, a detector detecting a focal position of the laser beam, and a controller. The controller obtains a current deviation amount of the focal position from a target position using the detector and obtains relationship data indicating a relationship between the deviation amount and a spot diameter of the laser beam on a surface of the workpiece when contaminant adheres to the protective glass. The controller estimates a current spot diameter using the current deviation amount and the relationship data, and controls the actuator to correct the current spot diameter.

Abstract: An impellor assembly for a liquid hydrogen pump. The assembly comprises a shaft, one or more impellors mounted to the shaft, a fastener configured to engage with the shaft at a first engagement point and with the one or more impellor at a second engagement point to axially clamp the one or more impellor to the shaft, an axially unconstrained length of the fastener being defined by an axial distance between the first and second engagement points. An axial extent of a clamped portion of the one or more impellors corresponds to the axially unconstrained length of the fastener. The fastener and the impellor comprise a material having a first coefficient of thermal expansion and the shaft comprises a material having a second coefficient of thermal expansion, wherein the first and second coefficients of thermal expansion are different.

Abstract: A component for a gas turbine engine, including: at least one internal cavity extending through the component, the internal cavity having at least one inlet opening and at least one outlet opening each being in fluid communication with the at least one internal cavity; and a plurality of cooling features extending from a surface of the at least one internal cavity, the plurality of cooling features extend away from the surface of the at least one internal cavity, each of the plurality of cooling features having a curved exterior surface and a passage extending from the curved exterior surface to an exterior surface of the component.

Abstract: A laser beam irradiation unit of a laser beam irradiation apparatus includes a laser beam source that emits a laser beam and a spatial light modulator that modulates the laser beam emitted from the laser beam source, according to a phase pattern, and that emits the laser beam. A controller has a storing section that stores the phase pattern to be displayed in the spatial light modulator and a rotation instructing section that rotates the phase pattern stored in the storing section. The controller uniformizes the power density of the laser beam with which a plate-shaped workpiece is irradiated, by rotating the phase pattern while the plate-shaped workpiece is irradiated with the laser beam.

Abstract: A processing apparatus that processes a workpiece includes a chuck table that holds the workpiece including multiple streets that intersect each other on a holding surface, a processing unit that processes the workpiece held by the chuck table along a corresponding one of the streets, and a controller. When processing is suspended with an unprocessed region left while the processing unit is caused to process the workpiece from one end to the other end of the street, the controller rotates the chuck table by 180 degrees and causes the processing unit to process the unprocessed region of the workpiece from the other end of the street.

Abstract: An electric vertical takeoff and landing aircraft including a teetering propulsor assembly is provided. The teetering propulsor assembly includes a propulsor, the propulsor including a monolithic blade including first and second blade portions extending radially outward from a hub, formed as a single unit. The coupling assembly includes a pair of torsional bearings coupled at the hub of the monolithic blade. The torsional bearings allow the monolithic blade to passively teeter in response to external forces applied to the propulsor, and exert a biasing, or centering, or restoring force on the monolithic blade that returns the monolithic blade to a neutral position. The torsional bearings may include an elastomeric member having relatively high stiffness, such as a high capacity laminate bearing.

Abstract: A gas turbine engine having a blade assembly with a platform, an airfoil, and a shank. The airfoil has a plurality of cooling conduits, and the shank has a plurality of inlet passages to provide cooling fluid to the cooling conduits in the airfoil. The cooling fluid is vented through a plurality of cooling holes along the airfoil. The blade assembly has specific geometries that improve durability.

Abstract: Provided is a handheld camera fan, which includes a handheld main machine. A top of the handheld main machine is rotatably connected to a connection arm, and another end of the connection arm is connected to a fan component; the fan component includes an installation cylinder, and an interior of the installation cylinder is provided with fan blades; the installation cylinder is provided with a camera adjacent to a center of an air inlet. The present disclosure integrates the camera at the center of the air inlet of the installation cylinder of the fan component and cooperates with the handheld main machine to effectively solve a significant defect of a single function of existing handheld fans. It enables a user to enjoy the instant cooling experience brought by portable air supply without carrying additional specialized camera equipment, and can easily capture, preview and record images with one hand.

Abstract: A lock device can be shifted between a locked state and an unlocked state. The lock device includes a lock pin, a solenoid, and a pressing unit. The lock pin is movable between a locked position where a propeller is locked and an unlocked position where the propeller is not locked. The pressing unit presses the lock pin to the locked position by a mechanical pressing force. The solenoid includes a solenoid coil and a plunger. When the solenoid coil is energized, the plunger moves the lock pin to the unlocked position against the mechanical pressing force.

Abstract: A blade is provided in which the specific rigidity of a flap part is further increased. This blade has a thick body part and a thin flap part integrally formed in the rear end of the body part. The flap part has a skin material containing a fiber-reinforced thermoplastic resin, and a core material containing a thermoplastic resin foam filled inside the skin material.

Abstract: An aircraft system having an impeller housing, an impeller housed within the impeller housing, wherein the impeller housing extends from an inlet end and to an outlet end, wherein the outlet end defines circumferentially distributed radially facing outlet ports, wherein in operation an airflow moves along a first axial direction into the inlet end of the impeller housing and is compressed by the impeller; a heat exchanger that is positioned radially exterior to the impeller housing and extends axially from an inlet end to an outlet end, wherein the inlet end of the heat exchanger defines inlet ports, and wherein in operation airflow into the heat exchanger moves along a second axial direction that is opposite the first axial direction; and diffuser pipes, wherein ones of the diffuser pipes connect ones of the inlet ports of the heat exchanger with ones of the outlet ports of the impeller housing.

Abstract: A method for producing an abradable ceramic composite coating on a substrate, the method including: obtaining a pulverulent composition including a matrix powder and a ceramic filler hydrated precursor powder having a lamellar crystallographic structure, wherein the ceramic filler powder represents from 5 to 40% of the combined volume of the matrix powder and the ceramic filler powder, compressing the prepared pulverulent composition at a pressure greater than 150 MPa, and a step of reactive sintering the obtained pulverulent composition, during which the compression is maintained, at a temperature of less than 550° C., and the particles of the matrix powder in the sintered pulverulent composition have an aspect ratio of 2 or greater.

Abstract: An apparatus comprising an induction furnace with a thermally and electrically conductive or non-conductive crucible containing an electrically conductive ferrous or non-ferrous material is provided with at least one bottom induction coil, one side induction coil and one top induction coil disposed exteriorly around the bottom, side and over the top surface of the material in the conductive or non-conductive crucible to provide a non-contact temperature boost or a flow rate boost to the material by selectively energizing a combination of the coils.

Abstract: A recirculating hydro-pneumatic impulse turbine including a collector assembly including a central draft tube extending therebelow, the collector assembly including a collector plate having a generally horizontal upper surface and being configured such that the draft tube is in fluid communication with the upper surface, there also being a series of peripherally arranged drive cups about the upper surface. The turbine also includes a drive assembly about the central draft tube, the drive assembly including a fluid inlet at its lower end in fluid communication with the lower end of the draft tube, and a plurality of tangentially arranged outlet nozzles configured at its upper end. The turbine also includes a central air tube with an upper air inlet and a lower air distribution manifold, the manifold including at least one venturi outlet capable of entraining air in the fluid to assist movement of the fluid from the lower end of the drive assembly upwardly to the outlet nozzles.

Abstract: A centrifugal pump includes at least one impeller. Downstream of the impeller there is arranged a guide device. The guide device is a hybrid component that includes at least one conventionally manufactured constituent and at least one generatively manufactured constituent.

Abstract: A propulsion system assembly includes an open propulsor rotor, an open guide vane structure and a nose cone. The open propulsor rotor is configured to rotate about an axis. The open guide vane structure is aft of the open propulsor rotor along the axis. The nose cone is forward of the open propulsor rotor along the axis. The nose cone includes a forward tip end, an aft base end, a stationary section and a rotating section. The aft base end is adjacent to the open propulsor rotor. The stationary section projects axially along the axis from a junction between the stationary section and the rotating section to the forward tip end. The rotating section projects axially along the axis from the junction between the stationary section and the rotating section to the aft base end. The rotating section is configured to rotate with the open propulsor rotor about the axis.