Abstract: A thrust disc for an aircraft and methods of making and using the thrust disc are provided. The thrust disc includes a planar body, and a region unitarily formed from a portion of the body, wherein the region has a plurality of sides defining the region on the planar body, wherein the region has a textured feature, and wherein a subset of the plurality of sides are cut and at least one of the plurality of sides is integrally connected to the body.

Abstract: A thrust disc for an aircraft and methods of making and using the thrust disc are provided. The thrust disc includes a planar body, and a region unitarily formed from a portion of the body, wherein the region has a plurality of sides defining the region on the planar body, wherein the region has a textured feature, and wherein a subset of the plurality of sides are cut and at least one of the plurality of sides is integrally connected to the body.

Abstract: A hydrodynamic fluid film journal bearing assembly includes a journal sleeve having a key slot formed therein in a substantially longitudinal direction, a bump foil wrapped in a substantially cylindrical shape adjacent to the journal sleeve and having a bent end portion engaged with the key slot, an intermediate foil wrapped in a substantially cylindrical shape adjacent to the bump foil, a top foil wrapped in a substantially cylindrical shape adjacent to the intermediate foil, a first top foil cutout window formed adjacent to the bent region, and a first end tab formed at a free end of the top foil. The first end tab is wrapped with the top foil in the substantially cylindrical shape of the top foil, and extends into the first top foil cutout window to reduce skewing. The top and intermediate foils are joined at a bent region that engages the key slot.

Abstract: A hydrodynamic fluid film journal bearing system includes a journal sleeve and one or more hydrodynamic fluid film foils positioned at least partially within the journal sleeve. The journal sleeve defines an inner diameter surface, an outer diameter surface, a wall thickness between the inner and outer diameter surfaces, and opposite first and second ends. The wall thickness of the journal sleeve is reduced at a first region located between the first and second ends, and a chamfered region is formed on the outer diameter surface of the journal sleeve between the first o-ring land and the first end of the journal sleeve.

Abstract: A hydrodynamic fluid film journal bearing assembly includes a journal sleeve having a key slot formed therein in a substantially longitudinal direction, a bump foil wrapped in a substantially cylindrical shape adjacent to the journal sleeve and having a bent end portion engaged with the key slot, an intermediate foil wrapped in a substantially cylindrical shape adjacent to the bump foil, a top foil wrapped in a substantially cylindrical shape adjacent to the intermediate foil, a first top foil cutout window formed adjacent to the bent region, and a first end tab formed at a free end of the top foil. The first end tab is wrapped with the top foil in the substantially cylindrical shape of the top foil, and extends into the first top foil cutout window to reduce skewing. The top and intermediate foils are joined at a bent region that engages the key slot.