Abstract: In one embodiment of the present disclosure, there is provided a planetary gear system. The planetary gear system includes a split double helical ring gear having a first ring gear with first helical ring teeth and a second ring gear with second helical ring teeth, a split double helical sun gear having a first sun gear with first helical sun teeth and a second sun gear with second helical sun teeth, a sun gear coupler coupling the first sun gear and the second sun gear; and a single-piece double helical planet pinion having a first helical planet teeth portion and a second helical planet teeth portion, where the first helical planet teeth mesh with the first helical sun teeth and the first helical ring teeth, and the second helical planet teeth mesh with the second helical sun teeth and the second helical ring teeth.

Abstract: In one embodiment of the present disclosure, there is provided a planetary gear system. The planetary gear system includes a split double helical ring gear having a first ring gear with first helical ring teeth and a second ring gear with second helical ring teeth, a split double helical sun gear having a first sun gear with first helical sun teeth and a second sun gear with second helical sun teeth, a sun gear coupler coupling the first sun gear and the second sun gear; and a single-piece double helical planet pinion having a first helical planet teeth portion and a second helical planet teeth portion, where the first helical planet teeth mesh with the first helical sun teeth and the first helical ring teeth, and the second helical planet teeth mesh with the second helical sun teeth and the second helical ring teeth.

Abstract: In one embodiment of the present disclosure, there is provided an aircraft gearbox including a gear and a gear shrouding for providing lubrication to the gear. The gear shrouding is disposed around the gear, has an inner surface facing the gear and an opposing outer surface facing away from the gear, and includes a channel formed along at least a portion of the gear shrouding between the inner surface and the outer surface of the gear shrouding, an input orifice extending to the channel, wherein the input orifice is at a first position on the channel, and an output orifice extending to the channel, wherein the output orifice is at a second position on the channel different from the first position. In another embodiment, the gear shrouding further includes a second output orifice at a third position on the channel different from the first and second positions.

Abstract: A system for securing a bearing to a shaft includes a shaft having a raised portion extending radially outward from the shaft. The raised portion includes a first angled face on a first side of the raised portion and a second angled face on a second side of the raised portion. The bearing includes an outer race comprising a bearing surface on an inner face of the outer race, an inner race comprising a bearing surface on an outer face of the inner race and a third angled face on an inner face of the inner race that is configured to mate with the first angled face, and a plurality of rollers disposed between the inner and outer races.