Abstract: An electronic module assembly includes a circuit card assembly (CCA) with heat generating electronic components. A connector is electrically connected to the heat generating electronic components, wherein the connector is positioned at a connection end of the CCA. A heatsink is mounted to the CCA, connected in thermal communication with the electronic components. An undulating channel feature is defined along a lateral edge of the heatsink relative to the connector. One or more channels of the undulating channel feature are aligned with an insertion axis defined by the connector.

Abstract: A buck-boost power converting system includes a voltage source input for connecting a voltage source for power conversion. A plurality of switches are electrically connected to the voltage source input. Each switch is connected to a controller configured for control of the switches. A load output is operatively connected to the switches to provide non-inverted output voltage relative to the voltage source input in a non-inverted mode and to provide inverted output voltage relative to the voltage source input in an inverted mode. A holdup capacitor with a holdup voltage output is operatively connected to the plurality of switches to provide negative holdup voltage for output if power to the voltage source input is interrupted, regardless of whether the load output is in the inverted mode or the non-inverted mode.

Abstract: An engine ignition system can include a multifunction controller, and an exciter operatively connected to the multifunction controller. The multifunction controller can be configured to control the exciter to output an ignition voltage. The multifunction controller can be configured to perform at least one other engine control function.

Abstract: An integrated asymmetric brake system for an aircraft includes a housing and a control surface actuator arranged in the housing. The control surface actuator includes a torque limiter output member and is operable to selectively deploy and retract a control surface. An asymmetry brake system is arranged in the housing and is operably connected to the control surface actuator and the torque limiter output member. The asymmetry brake system is selectively operable to prevent deployment of the control surface by activating the torque limiter output member upon detecting an asymmetry event. An asymmetry brake test monitor switch is mounted in the housing and operably coupled to the asymmetry brake system. The asymmetry brake test monitor switch is monitored to confirm functionality of the asymmetry brake system prior to flight.

Abstract: A heat exchanger includes a first fluid pathway enclosed in a heat exchanger body to convey a first fluid through the heat exchanger body and a second fluid pathway enclosed in the heat exchanger body to convey a second fluid through the heat exchanger body and facilitate thermal energy exchange between the first fluid and the second fluid. The first fluid pathway and the second fluid pathway together are arranged in a spiral arrangement extending along a central axis of the heat exchanger.

Abstract: A system for visibility in an atmospheric suit includes a camera arranged to view an environment outside the atmospheric suit and a display device to display an image obtained by the camera. An input device obtains input from a wearer of the atmospheric suit. A controller changes a feature of the camera based on the input. The image obtained by the camera and displayed by the display device is modified based on the feature.

Abstract: A ram air turbine (RAT) assembly includes a turbine having at least one turbine blade that rotates about a turbine driveshaft, a lower gear box coupled to the driveshaft, a generator/pump housing and a strut connected between the lower gear box and the generator/pump housing. The assembly also includes a damping element connected to one of the strut and the lower gear box. The damping element includes an actuator including an extendable member and a mass element connected to the extendable member and that can be moved by the extendable member from a retracted position to an extended position, wherein the mass element is closer to the actuator when in the retracted position than when in the extended position.

Abstract: A stacked gerotor pump is provided. The stacked gerotor pump includes a first gerotor pump defining a first inlet section and a first outlet section, a second gerotor pump defining a second inlet section and a second outlet section and a plate. The plate is interposed between the first and second gerotor pumps and defines upstream cavities respectively communicative with the first and second inlet sections, downstream cavities respectively communicative with the first and second outlet sections and a pre-pressurization hole by which the second outlet section is communicative with the first inlet section.

Abstract: An assembly comprises a mounting ring for a rotating rectifier assembly (RRA) having a pin bore defined in the mounting ring oriented in an axial direction and at least one contact band seated in a the pin bore of the mounting ring for mounting a direct current (DC) pin to the mounting ring. A method comprises forming a mounting ring for a rotating rectifier assembly (RRA), including forming a pin bore in the mounting ring oriented in an axial direction, and installing at least one contact band into a the pin bore of the mounting ring.

Abstract: A composite shaft includes a shaft body formed from a plurality of polymer impregnated fiber-reinforced material layers having an annular outer surface and an annular inner surface defining a passage. A plurality of internal support members extend along the passage. Each of the plurality of internal support members includes a support body formed from molded plastic having an outer surface that abuts the annular inner surface of the support body, a first end, an opposing second end, and a circular end wall arranged at one of the first end and the opposing second end.

Abstract: A thermal management system includes a refrigerant receiver configured to store a refrigerant fluid, a closed-circuit refrigeration system having a closed-circuit fluid path with the refrigerant receiver, and with the closed-circuit refrigeration system configured to receive refrigerant from the refrigerant receiver through the closed-circuit fluid path, an open-circuit refrigeration system having an open-circuit fluid path, and with the refrigerant receiver disposed in the open-circuit fluid path, with the open-circuit refrigeration system configured to receive refrigerant through the open-circuit fluid path, and discharge refrigerant fluid through an exhaust line, and an evaporator arrangement configured to receive the refrigerant and to extract heat from at least one heat load, the evaporator arrangement having an inlet and an outlet, with the evaporator disposed in a common portion of the closed-circuit fluid path and the open-circuit fluid path.

Abstract: In accordance with at least one aspect of this disclosure, a method can include selectively sintering at least a portion of a part and one or more indexing features onto a build plate disposed in a build area of a feedstock powder bed, determining an actual orientation of the part and the build plate relative to a recoater prior to recoating, storing the actual orientation of the part and the build plate relative to the recoater, comparing the actual orientation of the part and the build plate relative to the recoater with a predicted orientation, and recoating the build area with feedstock powder if the actual orientation of the part and the build plate relative to the recoater matches the predicted orientation to achieve a predetermined build quality for a respective layer of the part.

Abstract: A circuit calibration system can include a calibration voltage source, a calibration output line, and a variable voltage system connected between the calibration voltage source and the calibration output line. The variable voltage system can be configured to provide a variable calibration voltage to the calibration output line.

Abstract: A power source selection system can include a primary source line configured to be connected to a primary source having a primary voltage, a backup source line configured to connect to a backup source having a backup voltage, and a voltage divider and limiter connected to the primary source line to receive the primary voltage and to provide an sense signal on a sense line. The system can include a NAND gate connected to the voltage divider and limtier to receive the sense signal. The NAND gate can be configured to provide a gate signal to a gate line based on the sense signal. The system can include a switchover circuit connected to the backup source line and the gate line to receive the backup voltage and the gate signal. The switchover circuit can be configured to output the backup voltage to a switch line in a first state, and to prevent backup voltage to the switch line in a second state.

Abstract: Circuit board assemblies include a circuit board portion having a recess formed therein, an electrically and thermally conductive insert, shaped to fit in the recess formed in the circuit board portion, an electrically and thermally conductive layer adapted and configured to interface with an external chassis, and a thermally conductive electrically insulative portion interposed between the electrically and thermally conductive insert and the electrically and thermally conductive layer, adapted and configured to conduct heat from the electrically and thermally conductive insert to the electrically and thermally conductive layer without conducting electricity.

Abstract: Disclosed is an evaporator header insert, including: a header insert body that extends along a body center axis between body inlet and outlet ends, a center passage located within the header insert body, the center passage extending from the body inlet end to the body outlet end along the body center axis, the center passage surface defining: a center passage inlet portion at the body inlet end; a center passage outlet portion, at the body outlet end, that defines a body nozzle portion on the body center axis, wherein the body nozzle portion has a convergent-divergent shape so that the body nozzle portion has a convergent segment, a divergent segment and a neck segment therebetween; and a conical tip member, fixed to the body outlet end and disposed at least partially within the divergent segment of the body nozzle portion so that a conical outlet passage is formed therebetween.

Abstract: An intelligent architecture system is provided. The intelligent architecture system includes an input line, an output line and an intelligent architecture operably interposed between the input line and the output line. The intelligent architecture is configured to control a voltage of the output line in accordance with a voltage of the input line.

Abstract: A power converter assembly includes a semi-conductor module, a heat sink mechanically connected to the semi-conductor module, a first busbar assembly on a first side of the heat sink, and a second busbar assembly on a second side of the heat sink opposite from the first side. The first and second busbar assemblies are electrically connected to one another. A power converter assembly includes a plurality of sets of semi-conductor modules, a common heat sink mechanically connected to each semi-conductor module, a first busbar assembly on a first side of the common heat sink, and a second busbar assembly on a second side of the common heat sink opposite from the first side. The first and second busbar assemblies are electrically connected to one another.

Abstract: A heat exchanger includes a flow channel operatively connecting a channel inlet to a channel outlet to channel fluid to flow therethrough. The flow channel is defined at least partially by a shape change material. The shape change material changes the shape of the flow channel based on the temperature of the shape change material.

Abstract: A method for regulating loading of an aircraft engine providing power to multiple loads, particularly ECS, comprising offloading selected power consuming loads according to a predetermined strategy when predetermined conditions are met.