Abstract: A gear shroud arrangement includes a mounting plate defining an aperture therethrough. A first cylindrical shroud is included having a first end and an opposed second end, wherein the first end of the first shroud is connected to an outer periphery of the mounting plate and is aligned with the aperture. A backing plate is mounted to the second end of the first shroud. A second cylindrical shroud extends from the backing plate in a direction opposite the first shroud.

Abstract: A power distribution assembly according to an example of the present disclosure includes, among other things, a housing at least partially receiving a plurality of hardware modules coupled to a backplane, the plurality of hardware modules including at least one output module and a communications module that communicates information between the plurality of hardware modules and a second power distribution assembly. At least one hardware module of the plurality of hardware modules includes a field programmable gate array that commands the at least one output module to selectively power at least one aircraft system. A method of operation of a power distribution system is also disclosed.

Abstract: A fan housing includes an inner housing portion centered on a central axis, an outer housing portion centered on a central axis, and a disk portion connecting the first end of the outer housing portion to the first end of the inner housing portion. The inner housing portion has a first end and a second end positioned axially away from the first end. The outer housing portion has a first end and a second end positioned axially away from the first end. The outer housing portion includes a first thickened wall section with a first end and a second end, a stator interface section with a first end connected to the second end of the first thickened wall section and a second end, and a second thickened wall section with a first end connected to the second end of the stator interface section and a second end.

Abstract: An aircraft power generation unit to generate direct current (DC) power includes a flux regulated permanent magnet generator (PMG) that includes first through fourth sets of windings and a control coil and a rectifier section that include first through fourth six pulse rectifiers and a common local output bus. The unit also includes an output bus configured to be connected to the load and an H-bridge circuit connected across the output bus and outputs connected to the control coil. A controller receives an input signal from at least one of the windings and selectively couples either the common local output bus and fourth rectifier to the output bus negative rail and one or more of the first, second and third six-pulse rectifiers to the output bus to provide a constant voltage to the load.

Abstract: A method of producing electrical coils includes preparing a plurality of coil layers. Each coil layer is prepared by printing an electrically conductive coil pattern on a layer substrate. Each coil pattern includes an inner end at a first via through the substrate at a point radially inside the coil pattern, and an outer end at a second via through the substrate at a point radially outside the coil pattern. The method also includes joining the coil layers into a stack and electrically connecting successive coil patterns of the plurality of coil layers to one another through the vias to form a conductive coil extending through the stack.

Abstract: A rotor includes a shaft. A plurality of rotor modules are disposed about the shaft. Each of the rotor modules includes a cylindrical support ring, a ferromagnetic core radially outward of the support ring, at least one PM arc arranged in a first ring and at least one PM arc arranged in a second ring, the first and second ring being radially outward of the ferromagnetic core, and a retainer having a first wall disposed radially outward of the first ring and the second ring and a second wall defining an axial boundary between the first ring and the second ring.

Abstract: A water extractor including: an inlet; an outlet; a body including a helical passageway having an exit proximate the outlet and an entrance; an elbow connector enclosing a fluid passageway that fluidly connects the inlet to the entrance of the helical passageway, the elbow connector being bent at a selected angle and including an inner radius and an outer radius opposite the inner radius; and a baffle extending from proximate the inlet to the entrance and located within the fluid passageway of the elbow connector, the baffle being configured to partition the fluid passageway into a first fluid passageway proximate the inner radius of the elbow connector and a second fluid passageway proximate the outer radius of the elbow connector.

Abstract: A fluid degassing device includes a first housing, a second housing disposed within the first housing, a first flow circuit defined by the second housing and the first housing between a first flow circuit opening and a second flow circuit opening of the first flow circuit, and a tube bundle of selectively permeable membrane tubes disposed in the first flow circuit between the second housing and first housing. The tube bundle is disposed at least partially around a circumference of the second housing and the first flow circuit is defined between the first flow circuit opening of the first flow circuit and the second flow circuit opening such that fuel flows rotationally around the second housing through the tube bundle.

Abstract: An electric propulsion system for a gas turbine engine may comprise an electric motor disposed within a nacelle of the gas turbine engine, wherein the electric motor is configured to receive a bypass air from a fan bypass duct for cooling the electric motor and the electric motor is configured to drive a low speed shaft of the gas turbine engine.

Abstract: A terminal block for use in an integrated drive generator has a body having an outer support surface and extending to an inner surface. There are four connection channels for supporting electric connections for each of three phases of power and a neutral. There are fingers formed between adjacent ones of each of the four connection channels, with the fingers extending away from the support surface in a direction away from the inner surface. An integrated drive generator and a method are also disclosed.

Abstract: A data bus system includes a processor having a data output and a transceiver connecting the data output to a data bus. The transceiver includes a bus-hold circuit configured to maintain a latest value of the data output. At least one output latch connects the data bus to at least one corresponding controlled system.

Abstract: A fluid degassing device can include a shell configured to retain a selectively permeable hollow fiber bundle, wherein the shell defines a first flow port and a second flow port and at least a third flow port, and a selectively permeable hollow fiber bundle having a plurality of hollow fibers disposed within the shell such that a first flow circuit is defined between the first flow port and the second flow port, and a second flow circuit is defined in fluid communication with at least the third port such that an inner channel of one or more of the hollow fibers is in fluid communication with at least the third flow port, wherein second flow circuit is partially fluidly isolated from the first flow circuit such that at least one first fluid cannot pass through a wall of one or more hollow fibers, but such that at least one second fluid can pass through the wall of the one or more hollow fibers. The shell and the fiber bundle include a non-cylindrical shape.

Abstract: A printed circuit board includes a body and a belly pad seated within with the body. The belly pad is electrically separated into a first pad and a second pad. The first pad and the second pad are arranged to be electrically connected to one another by an interconnect electrically connecting the belly pad to a conductive plane of an electrical component, thereby allowing continuity testing across an interface between the first pad and the interconnect. Methods of testing continuity in electrical assemblies are also disclosed.

Abstract: A governor drive gear for use in an integrated drive generator has a gear body extending between a first end and a second end and having a disc extending radially outwardly. A boss extends from the disc toward the second end. There are outer gear teeth outwardly of an outer diameter of the disc. The outer gear teeth have a unique gear tooth profile with roll angles A, B, C, and D. An integrated drive generator and a method are also disclosed.

Abstract: An aircraft electrical system includes a controller system having a self-testing system configured to test an operability of a transient voltage suppression device. A single line communication bus is connected to a communications output of the controller. A first lightning protection device including the transient voltage suppression device is configured to protect the controller from transient voltages. An enable/disable circuit comprising a normally closed switch connects a low side of the lightning protection device to a neutral.

Abstract: A power control module includes a power device having a first side and a second side opposite from the first. The power control module includes a printed wiring board (PWB) spaced apart from the first side of the power device. The PWB is electrically connected to the power device. A heat sink plate is soldered to a second side of the transistor for heat dissipation from the transistor. The PWB and/or the heat sink plate includes an access hole defined therein to allow for access to the transistor during assembly. A method of assembling a power control module includes soldering at least one lead of a power device to a printed wiring board (PWB), pushing the power device toward a heat sink plate, and soldering the power device to the heat sink plate.

Abstract: A method includes providing a workpiece with at least one surface having an anodized aluminum coating and a trivalent chromium sealant. The at least one surface of the workpiece is submerged in a post-treatment sealant solution for 0.5 to 20 minutes. The sealant composition consists essentially of a corrosion inhibitor formulation, a water soluble polymer, an organic complexing agent, and an oxidant. The corrosion inhibitor formulation is formulated from at least one anodic corrosion inhibitor compound, at least one cathodic corrosion inhibitor compound, or a combination thereof. A concentration of each of the corrosion inhibitor formulation, the water soluble polymer, the organic complexing agent, and the oxidant is each in a range of 1-50 mM.

Abstract: A method of making an assembly is disclosed. According to the method, a curable sealant is applied to a metal surface of a first article, and the curable sealant and first article are stored under conditions to maintain the curable sealant in an at least partially uncured state. The method further includes contacting the curable sealant on the first article metal surface with an electrically conductive surface of a second article, and curing the curable sealant.

Abstract: A speed detection device includes a comparator module, a sensor lead with a node connected to the comparator module, and a limit set module. The limit set module is connected to the sensor lead node and to the comparator by an upper limit lead and a lower limit lead to provide upper and lower limits to the comparator that vary according to amplitude variation in voltage applied to the sensor lead.

Abstract: A hydraulic damping device includes a housing defining a fluid inlet and a fluid outlet, a damping plate disposed within the housing, the damping plate including a plurality of damping holes defined therethrough and positioned to allow fluid communication between the fluid inlet and the fluid outlet, and a blocking member disposed within the housing and configured to rotate relative to the damping plate to progressively block the damping holes.