Epicyclic Gear Box - Automobile 

sure sir.. i am from bihar,patna

Didn't understood question, please nelaborate.

@@SampurnaEngg what if Sun gear rotates in clockwise direction Planet gear is fixed(planet shaft can rotate) Now in what direction does ring gear rotate?? Clockwise or anti clockwise or doesn't rotate

In the condition you explained, if planet gear is stationary but planet shaft rotating then total system will rotate in clockwise. As Sun gear rotate clockwise, planet gear will move clockwise w r to sun gear shaft axis (please note that planet gear will not rotate about its own axis but it will rotate about axis of sun gaer). The motion will transmit from sun gear to planet gear and then planet gear to ring gear. Ring gear will rotate clockwise.

@@SampurnaEngg and the gear ratio is 1:1 am I correct

@@013grandhimanohar7 absolutely correct...it is 1:1.

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Thanks sir

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