Abstract: A heat exchanger is provided. The heat exchanger is formed of a spiral wound flow body (70) having a plurality of passages (76) ending therethrough for passage of a first fluid. The flow body is positioned within a housing (42) and a cross-flow of a second fluid passes between or across successive layers of the spiral wound flow body. The intermixing of the thermal energy of the cross-flowing second fluid and the first fluid provide improved heat exchange.

Abstract: Systems and methods for detecting an issue with a starter are provided. One example aspect of the present disclosure is directed to a method for detecting an anomaly with an air turbine starter. The method includes receiving, by one or more controllers, data indicative of a frequency associated with an integrated air turbine starter from one or more sensors located on a stationary portion of the air turbine starter to monitor a rotating portion of the air turbine starter. The method includes determining, by the one or more controllers, an anomaly associated with the integrated air turbine starter based at least in part on the data indicative of the frequency. The method includes providing, by the one or more controllers, a notification indicative of the anomaly associated with the integrated air turbine starter.

Abstract: A temperature sensing probe assembly includes a temperature sensing probe having a tip and a first thermocouple junction located nearer the tip and a second thermocouple junction located nearer an attachment point for the temperature sensing probe assembly, and a housing positioned around at least a portion of the temperature sensing probe.

Abstract: A heat exchanger for a turbine engine having a body including a first surface, a second surface opposite the first surface, and at least one fluid passage configured to carry a flow of heated fluid proximal to the second surface and where the body is arranged to transfer heat from the heated fluid to a cooling fluid passing by the second surface.

Abstract: A rotor assembly for an electric machine or power generation system, includes a shaft having a rotational axis, a first cylindrical section rotatably supported by the shaft and having a first rotor core, and a second cylindrical section, axially spaced from the first cylindrical section along the rotational axis, the second cylindrical section rotatably supported by the shaft, and wherein a set of magnet surface polarities are arranged to improve power output.

Abstract: A fast-responding RTD assembly is provided having a housing including a cage having at least one flow through aperture, a cover disposed over at least one of the housing and the cage, a thin-walled RTD member having a first polyimide tape layer, a second polyimide tape layer sandwiching first and second lead tabs, and a conductor extending between the lead tabs, the thin-walled RTD located within the housing and held in position by a support structure first and second leads extending to the thin-walled member and corresponding to the first and second leads tabs, the thin-walled RTD member being one of curvilinear, linear, circular and spiral and minimizing contact with the housing to minimize conduction error.

Abstract: A method of controlling an engine for a propeller-driven aircraft, including setting an initial maximum power limit, wherein the initial maximum power limit is associated with a maximum allowable thrust for an aircraft, receiving an indication that a predetermined aircraft condition is satisfied, and setting an updated maximum power limit.

Abstract: An apparatus and method of forming a heat exchanger can include a first manifold that defines a first fluid inlet to the heat exchanger and a second manifold that defines a second fluid inlet to the heat exchanger. A lattice cell body can be provided in the heat exchanger that can form a first set of flow passages and a second set of flow passages. The first and second sets of flow passages can be intertwined with one another.

Abstract: Provided is a method for implementing skewing in a hybrid homopolar generator. The method includes aligning slots within an axial front segment of a stator, with corresponding slots within an axial back segment of the stator. The method also includes moving, during assembly, the axial front segment and the axial back segment relative to each other such that slots in the axial front segment and the axial back segment form a pattern.

Abstract: There is provided an electric machine that includes a rotor comprising a pole and magnet assemblies divided axially in a first subsection and a second subsection. Each of the first and second subsections includes poles and magnets, and the poles and magnets of the first subsection are offset from the poles and magnets of the second subsection.

Abstract: Provided is a method for implementing skewing in a hybrid homopolar generator comprising. The method includes aligning inductor poles within an axial front segment of a rotor, with corresponding magnets within an axial back segment of the rotor. The method also includes moving, during assembly, the axial front segment and the axial back segment relative to each other such that inductor poles in the axial front segment and the axial back segment form a pattern.

Abstract: A turboprop control system 10 for use with a turboprop 2 having a turbine engine 12 operably coupled to and rotationally driving a propeller 14 having variable pitch blades 16 to control the engine speed, propeller speed, and propeller pitch. The pilot provides, by a single power control lever 30, the control input used to control the engine and propeller.

Abstract: A combustor for a gas turbine engine includes a combustion chamber and a fuel igniter assembly. The combustion chamber is defined by an annular inner combustor liner and an annular outer combustor liner. The fuel igniter assembly is coupled to the combustor and extends radially outward from the outer combustor liner. The fuel igniter assembly includes an igniter housing configured to house a fuel igniter therein, and a heat-dissipating element coupled to the igniter housing. The heat-dissipating element includes a plurality of fins configured to dissipate heat from the fuel igniter assembly.

Abstract: A heat exchanger assembly comprises a heat exchanger body including a first fluid circuit and a second fluid circuit. The first circuit includes a first bypass valve in flow communication with a first fluid circuit inlet channel. The first fluid circuit also includes a plurality of cooling channels in flow communication with the first bypass valve. The first bypass valve is configured to channel a first fluid to the plurality of cooling channels during a first mode of operation to facilitate reducing a temperature of the first fluid. The second fluid circuit includes a second bypass valve configured to facilitate a flow of a second fluid through at least a portion of the heat exchanger body during the first mode of operation.

Abstract: A heat exchanger is provided. The heat exchanger is formed of a spiral wound flow body (70) having a plurality of passages (76) ending therethrough for passage of a first fluid. The flow body is positioned within a housing (42) and a cross-flow of a second fluid passes between or across successive layers of the spiral wound flow body. The intermixing of the thermal energy of the cross-flowing second fluid and the first fluid provide improved heat exchange.

Abstract: A method of decoupling a battery during high current cranking of an engine comprises charging a supercapacitor bank to a preselected DC supercapacitor voltage from a battery when said battery is above a preselected battery voltage, switching the supercapacitor bank to a load and switching the battery off the load, starting the engine and supplying initial voltage and current until terminal voltage of the supercapacitor is equal to terminal voltage of the battery, switching the battery into parallel with the supercapacitor, disconnecting the supercapacitor from the load, and recharging the supercapacitor to the preselected DC capacitor voltage.

Abstract: A surface heat exchanger is provided which utilizes forward and aft brackets to retain the heat exchanger in position. The surface heat exchanger includes a plurality of core cooling channels as well as fins which are disposed for air flow through the gas turbine engine. The brackets include a low-friction wear material as well as an isolator sheet which provides some spring force on the heat exchanger.