How train turns in circular path?

Hi guys I come with the interesting question ‘How train takes a turn in curved path without differential gears like the automobiles???’

    In trains, the differential gears are not possible because there are large number of wheels present in each carriage of the train. Our mind blowing what can be there, simply the small idea behind this. We will see the whole idea below.

  Basically the train wheels are frustum in shape. It is running in the same manner when it is moving in the straight path. But If we want to turn it into right, the larger diameter of the frustum wheel should contact at the right side of the track and the smaller diameter should contact at the left side of the track. So, the right side wheel will cover more distance than the left side wheel due to smaller diameter in the left side. When the train takes the turn, the centrifugal force acts on the train to make the changes in the diameter of the wheels.

           

I hope that you have understand the concept which I am given. Still if you have some doubt, please free to contact me at marirenu141@gmail.com.