Question

In which of the configuration of epicyclic gearbox output will be forward and fast output speed?

(a) Sun gear stationary, ring gear driven, planet carrier driving

(b) Sun gear driving, ring gear driven, planet carrier stationary

(c) Sun gear driven, ring gear stationary, planet carrier driving

(d) Sun gear stationary, ring gear stationary, planet carrier driving

This question was addressed to me by my school teacher while I was bunking the class.

I'm obligated to ask this question of Transmission System topic in division Chassis & Transmission System of Automobile Engineering

Answer 1

Correct option is (a) Sun gear stationary, ring gear driven, planet carrier driving

The explanation: When the Sun gear is stationary, the planet carrier is driving and the ring gear is driven then output is forward and fast speed. When any two of the three are stationary then we get the direct drive.