Abstract: A sensor apparatus includes a metal oxide semiconductor sensor and a housing having an internal chamber in which the sensor is disposed. The housing includes at least one window for the ingress of a gas into the internal chamber from an atmosphere exterior to the housing. A gas-selective barrier is disposed across the at least one window.

Abstract: A linear actuation system has two linear actuator channels acting in tandem and a gear housing connecting the two actuator channels and providing an output for the actuation system. The gear housing has multiples gears with at least one gear connected to each actuator and is movable.

Abstract: A crucible includes a composite of least two materials. The two materials are selected from a group consisting of alumina, calcia, yttria, erbia, gadolinia, magnesia, hafnia, and zirconia in a composition that has better resistance to reaction with hafnium from a molten hafnium-containing alloy than a nominal crucible composition of 70 wt % magnesia and 30 wt % alumina.

Abstract: An inlet system, including for an auxiliary power unit includes an inlet louver mounted to an inlet duct, the inlet louver defines a multiple of vanes positioned to shield the inlet duct from fluids which fall in direction generally transverse to a free stream airflow.

Abstract: A blade outer air seal for being positioned radially outwardly of a gas turbine blade has at least one cooling air passage with a dividing wall dividing the at least one cooling air passage into two separate flow paths. The dividing wall does not extend throughout an entire length of the blade outer air seal of the first dimension.

Abstract: A bypass valve assembly for a generator includes a spring cover with a flange which extends in a radial direction from a spring cover body. The spring cover body defines an overall length dimension, the overall length dimension to an end of the spring cover body to the flange dimension defines a ratio between 1.6:1-1.2:1. The bypass valve assembly also includes a valve sleeve with a multiple of windows. Each of the multiple of windows includes a longitudinal edge which defines a longitudinal edge radius and corner radius.

Abstract: An apparatus and method generate electric current within a specified frequency range from a rotor operating within a broad range of rotational speeds by reducing the number of poles of the generator at higher rotational speeds. At higher rotational speeds, the generator circuit is altered so that a flow of current through half of a plurality of windings is reversed and the polarity in the said half of the windings is reversed. Two adjacent windings with the same polarity create a single pseudo pole, which effectively reduces the number of poles in the generator by half, and reduces the frequency of the electric current produced by the generator. Thus, the generator is operable to produce current within a specified frequency range from a rotor operating within a broad range of rotational speeds.

Abstract: An aircraft electrical system includes a generator that supplies electrical AC power to a plurality of accessories associated with a gas turbine engine. The generator also supplies power to an aircraft DC bus in parallel to the supply to the accessory bus.

Abstract: An example generator test assembly includes a testing module operative to test a generator according to a test procedure. At least one connector is configured to couple the generator to the testing module. The generator has a generator identifier. The test module is configured to select the test procedure from a plurality of potential test procedures based on the generator identifier.

Abstract: A fan variable area nozzle (FVAN) includes a flap assembly which varies a fan nozzle exit area. The flap assembly generally includes a multiple of flaps, flap linkages and an actuator system. The actuator system radially and axially translates a drive ring relative an engine centerline axis. A slot within the drive ring receives the flap linkages to asymmetrically and symmetrically vary the fan nozzle exit area in response to movement of the drive ring.

Abstract: A grind wheel includes a rim having at least one notch formed in the rim to grind a slot base of a blade retention slot within a rotor disk.

Abstract: A variable wash flow filter assembly includes guide that is operable to guide a wash velocity control cone between a minimal position and a maximum position. The guide defines at least one activation deltaP window downstream of a conical gap between the wash velocity control cone and a frusto-conical wash filter. The fuel flow through the conical gap and the activation deltaP window is operable to position the wash velocity control cone between the minimal position and maximum position to selectively split a fuel flow through an inlet into a burn flow through a thru flow port and a filtered flow thru the frusto-conical wash filter and filtered flow port.

Abstract: A planetary wheel end assembly includes an axle shaft having an inboard end and an outboard end and a planetary gear assembly that receives driving input from the axle shaft. The planetary gear assembly includes a sun gear that is fixed for rotation with the axle shaft, a plurality of planet gears that are in meshing engagement with the sun gear, a non-rotating ring gear that is in meshing engagement with the planet gears, and a planetary spider that supports the plurality of planet gears. The planetary spider provides driving output to rotate a wheel component. The sun gear includes a sun gear body having a plurality of sun gear teeth in meshing engagement with the planet gears and a plurality of splines that are coupled with mating splines on the axle shaft. The plurality of splines are axially inboard of the plurality of sun gear teeth.

Abstract: A coating apparatus includes a coating transfer roll that transfers a coating material from a coating material reservoir to a work piece. The coating material reservoir is formed between the coating transfer roll, a flexible blade and reservoir wall members. The flexible blade includes a first section that is fixed to a support. A second section of the flexible blade extends along a length of the coating transfer roll and is rotatable about the first section. An actuator selectively applies a pressure on the flexible blade during a coating operation to deflect the flexible blade and control a thickness of the coating material applied to the work piece.

Abstract: An example inert gas distribution arrangement includes a first fuel tank and a second fuel tank mountable to an aircraft outboard the first fuel tank. A distribution conduit is configured to communicate inert gas to the first fuel tank through a first outlet and further configured to communicate inert gas to the second fuel tank through a second outlet. Fuel in the distribution conduit is biased to flow from the second fuel tank toward the first fuel tank when the aircraft is in selected aircraft attitudes.

Abstract: A navigation system provides sensors and a user interface mounted in a single unit while allowing individual users to make adjustments to the user interface without affecting the functionality of the device. This is accomplished by mounting the orientation sensitive sensors (e.g. accelerometers, gyros, etc) rigidly to a mounting bracket rigidly mounted to the vehicle (such as to the dashboard). The sensors are mounted within a ball rigidly mounted to the bracket and the ball is secured within a rotatable socket on the user interface enclosure. In this manner, the user interface enclosure can rotate on the ball, but the orientation of the sensors relative to the vehicle will remain the same.

Abstract: An example turbofan engine sound control system includes a core nacelle (12) housing a compressor and a turbine. The core nacelle is disposed within a fan nacelle (34). The fan nacelle includes a turbofan. A bypass flow path downstream from the turbofan is arranged between the two nacelles. A controller (50) is programmed to manipulate the nozzle exit area to control sound propagating from the engine. In one example, the controller manipulates the nozzle exit area using hinged flaps (42) to control engine sound. The hinged flaps open and close to adjust the nozzle exit area and the associated bypass flow rate.

Abstract: An elevator system (20) includes multiple elevator cars (22, 32) within a hoistway (26). Counterweights (24, 34) are associated with the respective elevator cars (22, 32) by load bearing members (40, 50). In some examples, different roping ratios are used for the load bearing members (40, 50). In some examples, the lengths of the load bearing members (40, 50) are selected to allow contact between the counterweights (24, 34) within the hoistway (26) and prevent contact between the elevator cars (22, 32). The difference in car and counterweight separation distances is greater than a stroke of a counterweight buffer plus an expected dynamic jump of the elevator cars. A disclosed example includes passages (80) through a portion of at least one of the elevator cars (22) for accommodating the load bearing member (50) of another elevator car (32) located beneath the elevator car (22) with the passages (80).

Abstract: A mask for performing high speed media finishing on airfoils includes a thicker portion and a thinner portion. The thicker portion is spaced further from an edge that will become a leading edge in the final airfoil than the thinner portion. The media is redirected by the thicker portion toward the edge where the finishing is to occur.