How does an epicyclic gearbox work?
How does an epicyclic gearbox work?
The gear train consists of an alular gear ring on shaft, connected to the other by 'sun' and 'planet' gears within the annulus.

 

The gear train consists of an alular gear ring on shaft, connected to the other by 'sun' and 'planet' gears within the annulus. Gear changing is achieved by having one set per ratio, controlled by brakes on the annuli to bring the desired set into use. Th