Give two reasons for choosing an epicyclic gear system over

Give two reasons for choosing an epicyclic gear system over a compound gear train for similar gear ratio and torque transfer conditions and suggest one possible disadvantage.

Solution

Advantages:

1. Autimatic transmission is possible. Eg. Differential gear box.

2.Due to Load distribution among gears improves stability.

Disadvantages:

1. More complex design than compound gear train.