Special Purpose Epicyclic Gear Trains:
There are special purpose epicyclic gear trains which are used for specific work. Some of them are briefly explained as follows :
The gear train is shown in Figure 10.13. C is a star wheel which is connected to the driving shaft. It is operated by a striker fixed to the wheel of the bike and makes 15th of a revolution for one revolution of the wheel. There are two co-axial internal gears R and S of which R is fixed. The gear Q meshes with S and P meshes with R. The internal gear S makes one revolution for 1 km travelled by the bike.