Abstract: A reduction gear with epicyclic gear train including an annulus gear, and at least one planet gear rolling on the annulus gear and able to rotate about a planet spindle borne by a planet carrier is provided. The planet spindle is mounted such that it can itself rotate about its axis relative to the planet carrier. The reduction gear is suitable for mounting in a high bypass ratio jet engine for driving the fan thereof.

Abstract: A speed-sensitive, limited-slip, geared differential mechanism for transferring driving torque to each of two torque output shafts. Side gears located in a planetary gear carrier housing, one side gear being drivably connected to one pump member of a positive displacement pump and the planetary gear carrier being connected to another pump member. The pump is supplied with silicone fluid from a fluid reservoir. The pump creates a hydrostatic torque bias when differential motion of the side gears occurs as silicone fluid circulates through the pump.