1. If the axis of the shafts over which the gears are mounted are moving relative to a fixed axis , the gear train is called the epicyclic gear train.
2. Problems in epicyclic gear trains.
Differentials:
· Used in the rear axle of an automobile.
· To enable the rear wheels to revolve at different speeds when negotiating a curve.
· To enable the rear wheels to revolve at the same speeds when going straight.
Problem:1
