Abstract: A bleed air selector valve allows selection and extraction of bleed air from a plurality of different engine bleed air ports to optimize engine efficiency and to maintain bleed requirements using a single line replaceable unit. The bleed air selector valve uses a relatively simple arrangement of poppets, check valves, and thermostatic compensation to augment high and low temperature to within acceptable limits. The bleed air selector valve significantly reduces weight, cost, envelope, and system complexity as compared to known two-port bleed systems with heat exchanger thermal compensation.

Abstract: A bleed air selector valve allows selection and extraction of bleed air from a plurality of different engine bleed air ports to optimize engine efficiency and to maintain bleed requirements using a single line replaceable unit. The bleed air selector valve uses a relatively simple arrangement of poppets, check valves, and thermostatic compensation to augment high and low temperature to within acceptable limits. The bleed air selector valve significantly reduces weight, cost, envelope, and system complexity as compared to known two-port bleed systems with heat exchanger thermal compensation.

Abstract: A valve actuator for moving a valve element includes an actuator body, an opening piston, a closing piston, a first lost-motion link, and a second lost-motion link. The actuator body has an inner surface, a vent opening, a full-open pneumatic passageway, and a full-closed pneumatic passageway. The opening piston is movably disposed within the piston chamber between the vent opening and the full-open pneumatic passageway. The closing piston is movably disposed within the piston chamber between vent opening and the full-closed pneumatic passageway. The first lost-motion link is coupled to the opening piston and is operable to selectively rotate the valve element. The second lost-motion link is coupled to the closing piston and is operable to selectively rotate the valve element.

Abstract: A valve actuator for moving a valve element includes an actuator body, an opening piston, a closing piston, a first lost-motion link, and a second lost-motion link. The actuator body has an inner surface, a vent opening, a full-open pneumatic passageway, and a full-closed pneumatic passageway. The opening piston is movably disposed within the piston chamber between the vent opening and the full-open pneumatic passageway. The closing piston is movably disposed within the piston chamber between vent opening and the full-closed pneumatic passageway. The first lost-motion link is coupled to the opening piston and is operable to selectively rotate the valve element. The second lost-motion link is coupled to the closing piston and is operable to selectively rotate the valve element.

Abstract: Methods for producing Non-Equilibrium Alloy (NEA) feedstock powders are disclosed, as are methods for fabricating articles from such NEA feedstock powders utilizing Additive Manufacturing (AM) cold spray processes. In various embodiments, the method includes the step or process obtaining an NEA feedstock powder, which is composed of an alloy matrix throughout which a first minority constituent is dispersed. The first minority constituent precipitates from the alloy matrix when the NEA feedstock powder is exposed to temperatures exceeding a critical temperature threshold (TCRITICAL) for a predetermined time period. An AM cold spray process is carried-out to produce a near-net article from the NEA feedstock powder, which is exposed to a maximum temperature (TSPRAY_MAX) during the cold spray process. The near-net article is then further processed to yield a finished article.

Abstract: A pneumatic mixing valve is provided, which includes a housing that defines a first inlet, a second inlet and an outlet. The first inlet is coupled to a first fluid source and the second inlet is coupled to a second fluid source. The housing defines a first chamber and a second chamber. The pneumatic mixing valve includes a mixing system. The mixing system includes a piston that is movable by at least one of the first fluid and the second fluid. The housing defines a fluid passageway that extends from near the first inlet to the second chamber and the pneumatic mixing valve includes an actuator that is movable between a first position and a second position. In the first position, the fluid passageway is closed such that the outlet is open, and in the second position, the fluid passageway is open such that the outlet is closed.

Abstract: A pneumatic mixing valve is provided, which includes a housing that defines a first inlet, a second inlet and an outlet. The first inlet is coupled to a first fluid source and the second inlet is coupled to a second fluid source. The housing defines a first chamber and a second chamber. The pneumatic mixing valve includes a mixing system. The mixing system includes a piston that is movable by at least one of the first fluid and the second fluid. The housing defines a fluid passageway that extends from near the first inlet to the second chamber and the pneumatic mixing valve includes an actuator that is movable between a first position and a second position. In the first position, the fluid passageway is closed such that the outlet is open, and in the second position, the fluid passageway is open such that the outlet is closed.

Abstract: A pneumatic mixing valve is provided, which includes a housing that defines a first inlet, a second inlet and an outlet. The first inlet is coupled to a first fluid source and the second inlet is coupled to a second fluid source. The housing defines a first chamber and a second chamber. The pneumatic mixing valve includes a mixing system. The mixing system includes a piston that is movable by at least one of the first fluid and the second fluid. The housing defines a fluid passageway that extends from near the first inlet to the second chamber and the pneumatic mixing valve includes an actuator that is movable between a first position and a second position. In the first position, the fluid passageway is closed such the outlet is open, and in the second position, the fluid passageway is open such that the outlet is closed.

Abstract: Embodiments of a gas turbine engine actuation system are provided, as are embodiments of a high temperature actuator and methods for the manufacture thereof. In one embodiment, the gas turbine engine actuation system includes an actuated gas turbine engine component and a high temperature actuator, which has a rotor mechanically linked to the actuated gas turbine engine component and a stator surrounding at least a portion of the rotor. The stator includes, in turn, a coil support structure having a plurality of spokes extending radially therefrom. A plurality of pre-formed electromagnetic coils is circumferentially distributed about the coil support structure. Each of the plurality of pre-formed electromagnetic coils is inserted over at least one of the plurality of spokes in a radial direction. The stator further includes an inorganic dielectric material in which each of the plurality of pre-formed electromagnetic coils is at least partially embedded.

Abstract: Embodiments of an electromagnetic coil assembly are provided, as are methods for the manufacture of an electromagnetic coil assembly. In one embodiment, the method includes joining a first end portion of a braided lead wire to a coiled magnet wire. A dielectric-containing material is applied in a wet-state over the coiled magnet wire and over the first end portion of the braided lead wire. The dielectric-containing material is cured to produce an electrically-insulative body in which the coiled magnet wire and the first end portion of the braided lead wire are at least partially embedded. Prior to application of the dielectric-containing material, the braided lead wire is at least partially impregnated with a masking material deterring wicking of the dielectric-containing material into an intermediate portion of the braided lead wire.

Abstract: Embodiments of an electromagnetic coil assembly are provided, as are methods for the manufacture of an electromagnetic coil assembly. In one embodiment, the method for manufacturing an electromagnetic coil assembly includes the steps of providing a braided aluminum lead wire having a first end portion and a second end portion, brazing the first end portion of the braided aluminum lead wire to a first electrically-conductive interconnect member, and winding a magnet wire into an electromagnetic coil. The second end portion of the braided aluminum lead wire is joined to the magnet wire after the step of brazing.

Abstract: A pneumatic mixing valve is provided, which includes a housing that defines a first inlet, a second inlet and an outlet. The first inlet is coupled to a first fluid source and the second inlet is coupled to a second fluid source. The housing defines a first chamber and a second chamber. The pneumatic mixing valve includes a mixing system. The mixing system includes a piston that is movable by at least one of the first fluid and the second fluid. The housing defines a fluid passageway that extends from near the first inlet to the second chamber and the pneumatic mixing valve includes an actuator that is movable between a first position and a second position. In the first position, the fluid passageway is closed such the outlet is open, and in the second position, the fluid passageway is open such that the outlet is closed.

Abstract: Embodiments of a high temperature electromagnetic coil assembly are provided, as are embodiments of a method for fabricating such a high temperature electromagnetic coil assembly. In one embodiment, the high temperature electromagnetic coil assembly includes a coiled anodized aluminum wire and an electrically-insulative, high thermal expansion ceramic body in which the coiled anodized aluminum wire is embedded. The electrically-insulative, high thermal expansion ceramic body has a coefficient of thermal expansion greater than 10 parts per million per degree Celsius and less than the coefficient of thermal expansion of the coiled anodized aluminum wire.

Abstract: Embodiments of an electromagnetic coil assembly are provided, as are methods for the manufacture of an electromagnetic coil assembly. In one embodiment, the method for manufacturing an electromagnetic coil assembly includes the steps of providing a braided aluminum lead wire having a first end portion and a second end portion, brazing the first end portion of the braided aluminum lead wire to a first electrically-conductive interconnect member, and winding a magnet wire into an electromagnetic coil. The second end portion of the braided aluminum lead wire is joined to the magnet wire after the step of brazing.

Abstract: Embodiments of a high temperature electromagnetic coil assembly are provided, as are embodiments of a method for fabricating such a high temperature electromagnetic coil assembly. In one embodiment, the high temperature electromagnetic coil assembly includes a coiled anodized aluminum wire and an electrically-insulative, high thermal expansion ceramic body in which the coiled anodized aluminum wire is embedded. The electrically-insulative, high thermal expansion ceramic body has a coefficient of thermal expansion greater than 10 parts per million per degree Celsius and less than the coefficient of thermal expansion of the coiled anodized aluminum wire.

Abstract: Embodiments of an electromagnetic coil assembly are provided, as are methods for the manufacture of an electromagnetic coil assembly. In one embodiment, the method includes joining a first end portion of a braided lead wire to a coiled magnet wire. A dielectric-containing material is applied in a wet-state over the coiled magnet wire and over the first end portion of the braided lead wire. The dielectric-containing material is cured to produce an electrically-insulative body in which the coiled magnet wire and the first end portion of the braided lead wire are at least partially embedded. Prior to application of the dielectric-containing material, the braided lead wire is at least partially impregnated with a masking material deterring wicking of the dielectric-containing material into an intermediate portion of the braided lead wire.

Abstract: A pressure and flow altitude compensated shut off valve includes a valve body, a valve element, and an altitude compensation pilot valve. The valve body has an inlet port, an outlet port, and a flow passage extending between the inlet port and the outlet port. The valve element is disposed within the flow passage and is responsive to fluid pressure at the inlet port to move between a closed position, in which fluid may not flow through the flow passage, and a plurality of open positions between the closed position and a full-open position. The altitude compensation pilot valve is coupled to the valve body and is responsive to pressure variations at the second port to control the fluid pressure at which the valve element moves to the closed and open positions.

Abstract: By way of example, a method for manufacturing an electromagnetic coil assembly includes the steps of providing a braided aluminum lead wire having a first end portion and a second end portion, brazing the first end portion of the braided aluminum lead wire to a first electrically-conductive interconnect member, and winding a magnet wire into an electromagnetic coil. The second end portion of the braided aluminum lead wire is joined to the magnet wire after the step of brazing.

Abstract: Methods for the manufacture of an electromagnetic coil assembly are provided. In one embodiment, the method includes joining a first end portion of a braided lead wire to a coiled magnet wire. A dielectric-containing material is applied in a wet-state over the coiled magnet wire and over the first end portion of the braided lead wire. The dielectric-containing material is cured to produce an electrically-insulative body in which the coiled magnet wire and the first end portion of the braided lead wire are at least partially embedded. Prior to application of the dielectric-containing material, the braided lead wire is at least partially impregnated with a masking material deterring wicking of the dielectric-containing material into an intermediate portion of the braided lead wire. In certain cases, the masking material may be removed from the braided lead wire after curing, and the electrically-insulative body may be sealed within a canister.

Abstract: Embodiments of an electromagnetic coil assembly are provided, as are methods for the manufacture of an electromagnetic coil assembly. In one embodiment, the electromagnetic coil assembly includes a body of dielectric material, a coiled magnet wire at least partially embedded within the body of dielectric material, a braided lead wire extending into the body of dielectric material to the coiled magnet wire, and a joint buried within the body of dielectric material and mechanically and electrically coupling the braided lead wire and the coiled magnet wire.