Abstract: An adapter for retrofitting a fuel control system. The adapter has an outlet port and an inlet port for connecting to an external fuel system. The adapter replaces a standard fuel filter and fuel filter bowl.

Abstract: A harmonic drive includes a first flexible gear and a second flexible gear disposed around the first flexible gear and coaxial with the first flexible gear. A first ring gear meshes with the first flexible gear, and a second ring gear meshes with the second flexible gear.

Abstract: A method for detecting an initial rotor angular position and starting a dynamoelectric machine having a stator and a rotor includes the steps of driving the dynamoelectric machine into partial magnetic saturation to determine the initial rotor angular position of the dynamoelectric machine, and starting the dynamoelectric machine utilizing the initial rotor angular position previously determined.

Abstract: An electrical system for a motorized system can include a controllable voltage AC generator configured to be connected to a power generation unit shaft and configured to convert rotational energy to electrical energy, wherein the controllable voltage AC generator is configured to output a desired voltage irrespective of a change in a rotational speed of the controllable voltage AC generator, and an AC bus operative to connect the controllable voltage AC generator to an AC electrical device.

Abstract: A dual check valve includes, a housing having a cavity fluidically connecting three ports, a movable member movably engaged within the cavity from at least a first position occluding a first port of the three ports, a second position occluding a second port of the three ports, and a third position allowing flow between both the first port, the second port and a third port of the three ports.

Abstract: A rocket propelled vehicle includes a controllable voltage AC generator configured to be connected to a power generation turbine shaft and configured to convert rotational energy to electrical energy, wherein the controllable voltage AC generator is configured to output a desired voltage irrespective of a change in a rotational speed of the power generation turbine shaft, an AC electric motor pump configured to pump at least one of fuel or oxidizer to a combustion chamber of the rocket propelled vehicle, and an AC bus connecting the controllable voltage AC generator to each of the AC electric motor pump.

Abstract: A system for controlling saturation of a magnetic core of a transformer includes a transformer control circuit, a Hall sensor, and a processor. The transformer control circuit is configured to provide cycles of bidirectional excitation to the transformer at a first frequency and a first duty cycle. The Hall sensor is configured to output a first field value of the magnetic core during a first half-cycle of each of the cycles of bidirectional excitation and a second field value during a second half-cycle of each of the cycles of bidirectional excitation. The processor is configured to increase the first duty cycle to a second duty cycle in response to a magnitude of the first field value exceeding a first threshold magnitude. The processor is further configured to increase the first frequency to a second frequency in response to both the magnitude of the first field value exceeding the first threshold magnitude and the magnitude of the second field value exceeding a second threshold magnitude.

Abstract: A solid-state contactor includes a housing, a lead, a bus plate, and an end connector. The lead extends through the housing and into an interior of the housing. The bus plate is disposed within the housing interior and mounts a die which is electrically connected to the lead through the bus plate. The end connector extends between the bus plate and the lead, attaching to the bus plate at an angle for coupling a plurality of bus plates with die to the lead in a stacked arrangement.

Abstract: A turbomachine blade clearance system includes an actuator including an actuating portion that can be fixed to an interior surface of a turbomachine housing and a shaft for actuating movement relative to the turbomachine housing, a turbomachine blade seal operatively connected to the shaft of the actuator and configured to move relative to the turbomachine housing to adjust a distance from a turbomachine blade of a turbomachine to maintain a predetermined gap clearance between the blade seal and the blade, a waveguide disposed within the shaft, and at least one antenna disposed in electromagnetic communication with the waveguide such that a signal from the antenna can be directed by the waveguide.

Abstract: A multi-cell battery pack may be designed to serve as a thermosiphon. Stated another way, multi-cell battery pack may be designed to incorporate a passive heat exchange technique based on natural convection, which circulates a substance (liquid, or gas such as air) without the necessity of a mechanical pump. In this way, insulating fluid in cavities between cells greatly enhances the likelihood of preventing a thermal runaway condition. The insulating fluid in cavities between cells may result in reduced arcing and the elimination of combustion within a battery housing.

Abstract: In one aspect, a fluid flow disruptor is provided. The fluid flow disruptor includes a base flange having an outer diameter and an inner diameter, the base flange configured to couple to a valve, and a cap extending from the base flange. The cap includes a proximal end coupled to the base flange about the inner diameter, a distal end, and a sidewall extending between the proximal end and the distal end. At least one aperture is formed in the sidewall, and the fluid flow disruptor is configured to direct a fluid flowing in an axial direction to flow around the cap distal end, through the at least one aperture, and through the base flange inner diameter into the valve, to thereby increase a turbulence of the fluid to decrease an axial momentum load of the fluid acting on the valve.

Abstract: An aircraft taxi system includes a controllable voltage AC generator configured to be connected to a power generation turbine shaft and configured to convert rotational energy to electrical energy, wherein the controllable voltage AC generator is configured to output a desired voltage irrespective of a change in a rotational speed of the power generation turbine shaft, an AC electric motor configured to motor at least one of fuel or oxidizer to a combustion chamber of the aircraft, and an AC bus connecting the controllable voltage AC generator to each of the AC electric motors.

Abstract: A lubrication system for a gas turbine engine includes a variable output lubricant pump operable to supply lubricant to an actuator system.

Abstract: A power distribution contactor mount, and a power distribution system incorporating the same, include a plurality of electrically and thermally conductive contactor posts operable to connect a contactor lead to a bus bar, a mounting panel face, wherein each of the contactor posts is received in the mounting panel face and extends through the mounting panel face, and a first heat dissipation component mounted on the mounting panel face and thermally connected to each of the contactor posts. The thermal connection is via a thermally conductive and electrically insulative polymer insert, and each of the posts protrudes through the first heat dissipation component.

Abstract: An integrated drive generator includes a housing having generator. Center and input housing portions are secured to one another. The center housing portion is sealed relative to the generator input housing portion with seal plates. A hydraulic unit is mounted to the center housing portion. The center housing portion includes first and second parallel surfaces. A machined surface is parallel to and recessed into one of the first and second surfaces in an area of the hydraulic unit. A method of assembling an integrated drive generator includes the steps of providing a bore in a center housing portion, pressing a bearing liner into the bore, with a portion of the bearing liner extending proud of a surface of the center plate, and machining the surface around and adjacent to the bearing liner to provide a machined surface parallel to the surface.

Abstract: A rectifier assembly and method are provided. The rectifier assembly includes an annular bus bar including an electrically conductive material, and an insulator ring receiving the annular bus bar. The insulator ring defines radially-extending resistor pockets and diode pockets therein. The rectifier assembly also includes resistors disposed in the resistor pockets and electrically connected with the annular bus bar, and diodes disposed in the diode pockets and electrically connected with the annular bus bar. The rectifier assembly also includes an outer housing receiving the annular bus bar and the insulator ring, such that the insulator ring is positioned radially between the annular bus bar and the outer housing.

Abstract: A liquid-to-air heat exchanger includes an air inlet header, an air outlet header, and a core. The air inlet header has an air inlet connection and the air outlet header has an air outlet connection. The core is connected to the air inlet header and the air outlet header. The core is angled relative to the air inlet connection and the air outlet connection. The air inlet connection and air outlet connection do not align in a straight flow path. The core is disposed at an acute angle relative to one of the air inlet connection and the air outlet connection and is disposed at an obtuse angle relative to the other of the air inlet connection and the air outlet connection.

Abstract: A flow restrictor includes a first disc and a second disc. A rod extends between the first disc and the second disc and spaces the first disc from the second disc. A first hole is formed in the first disc.

Abstract: A sampling device for a substance detection instrument includes a membrane comprising a porous support having a coating thereon, the coating comprising a carborane polysiloxane or an arylene polysiloxane, the membrane having a front side configured to be placed in contact with a test sample and a back side; a sample line having an inlet proximate to the back side of the membrane and an outlet in fluid communication with a substance detector; and a source of carrier gas in fluid communication with the back side of the membrane and the sample line inlet.

Abstract: A chemical detector is provided and includes a chemical detector device and a chemical agent aerosol vaporizer assembly. The chemical agent aerosol vaporizer assembly includes a vaporizer fluidly interposed between an inlet and an outlet and is configured to receive via the inlet a chemical agent aerosol in the vaporizer wherein the chemical agent aerosol is smeared against a fluted surface that is passivated against adsorption and vaporized. The vaporized chemical agent aerosol is subsequently output to the chemical detector device via the outlet.