Abstract: An assembly includes an output shaft, an input shaft with an internal reservoir, and a clutch. The clutch is adapted to selectively engage and couple the input shaft to the output shaft. The clutch has a pressure chamber that communicates with the reservoir of the input shaft. The reservoir has a sufficient volume to provide the pressure chamber with a fluid pressure adequate to maintain engagement of the clutch during an interruption of a fluid supply to the input shaft and clutch.

Abstract: A planetary gear assembly includes a sun gear, planetary gears engaging the sun gear, a ring gear arranged about the planetary gears, the ring gear engaging the planetary gears, and a carrier frame including one or more pairs of bearing containment bands, a plurality of connecting segments, a plurality of spoke portions, and a hub portion, wherein each pair of bearing containment bands is connected to an adjacent pair of bearing containment bands with a connecting segment of the plurality of connecting segments and a spoke portion of the plurality of spoke portions connects each connecting segment to the hub portion.

Abstract: A planetary gear assembly includes a sun gear, planetary gears engaging the sun gear, a ring gear arranged about the planetary gears, the ring gear engaging the planetary gears, and a carrier frame including one or more pairs of bearing containment bands, a plurality of connecting segments, a plurality of spoke portions, and a hub portion, wherein each pair of bearing containment bands is connected to an adjacent pair of bearing containment bands with a connecting segment of the plurality of connecting segments and a spoke portion of the plurality of spoke portions connects each connecting segment to the hub portion.

Abstract: A one-piece air exit port baffle for containment for an air start turbine includes a circular arc section with a circumferentially corrugated circular arc section and a flange section. The circumferentially corrugated circular arc section has a plurality of openings. The flange section is axially adjacent to the circumferentially corrugated circular arc section and configured for attachment adjacent to an air exit port of an air turbine starter.

Abstract: A planetary gear system includes a sun gear rotatable about an axis. Planetary gears are circumferentially arranged about and intermesh with the sun gear and peripherally with a ring gear. Each of the planetary gears is supported by a journal bearing arranged in a bore in a carrier wall. A carrier supports the journal bearings and is configured to rotate about the axis and carry the planetary gears. The carrier wall supports the journal bearings and has spaced apart lateral surfaces. A scupper is arranged between the lateral surfaces and provides an inlet in one of the lateral surfaces, in this example facing the sun gear. The inlet has a first circumferential dimension, and a passage fluidly interconnects the scupper to one of the journal bearings via the bore. The passage has a second circumferential dimension less than the first circumferential dimension.

Abstract: An example method of deaerating a mixture of fluid and air includes communicating a mixture of fluid and air directly against a wall of a reservoir to separate the fluid from the air. The method reuses the fluid held within the reservoir after the separating.

Abstract: An aircraft includes a powerplant system operable to power a main rotor system and a secondary thrust system, the secondary thrust system is selectively driven through operation of a clutch system, and a clutch system synchronization time corresponds to a response time of the powerplant system.

Abstract: In one example embodiment, a fluid transfer coupling arrangement includes a hollow shaft that is arranged in a housing and rotatable about an axis. The hollow shaft is provided by a wall having radially spaced interior and exterior surfaces. A first passage extends through the wall and is configured to communicate fluid between the interior and exterior surfaces. A fluid coupling is located mid-shaft, sealed about the exterior surface, and aligns to the first passage. The fluid coupling provides a second passage that is in fluid communication with the first passage. The fluid coupling includes a locating feature configured to permit radial movement of the fluid coupling relative to the housing and allowing the fluid coupling to track subtle shaft movements.

Abstract: An example accumulator reservoir includes a housing. The housing contains a system fluid chamber, a working fluid chamber, and a residual chamber. Vent paths are configured to vent fluid from the residual chamber. Each of the vent paths extends nonlinearly between a first opening and a second opening.

Abstract: A bushing for use in a planetary gear system has a cylindrical body portion defining a bore extending along a central axis to be received on a planetary gear shaft. A tab extends axially beyond a nominal body portion of the bushing and is received in a notch in a thrust washer adjacent to the bushing to prevent rotation of the thrust washer. A gear cage and an air turbine starter incorporating the bushing, along with a method of installing the bushing are also disclosed.

Abstract: An air turbine starter is provided and includes a rotor including turbine blades, which is rotatable about a rotational axis, a housing including a portion thereof radially surrounding the turbine blades to define a pathway along which fluids flow to interact with the turbine blades and a containment ring affixed to an exterior of the portion of the housing radially surrounding the turbine blades.

Abstract: A one-piece air exit port baffle for containment for an air start turbine includes a circular arc section with a circumferentially corrugated circular arc section and a flange section. The circumferentially corrugated circular arc section has a plurality of openings. The flange section is axially adjacent to the circumferentially corrugated circular arc section and configured for attachment adjacent to an air exit port of an air turbine starter.

Abstract: A bootstrap accumulator system includes an actuator cylinder that drives an accumulator piston through a multiple of nested actuator sleeves, comprising a multistage actuator cylinder.

Abstract: A locking plate for use in an air turbine starter has a lock plate body including an oil slinger extending away from a base. The base is positioned on an outer peripheral surface of a clutch frame. The slinger extends away from the base for a distance, and a ratio of the distance to a thickness of the base is ten and thirty. A clutch and air turbine starter, and a method of assembly are also disclosed.