Wheels of train have a coller inside. The coller has taper, i.e its radius vary along the depth. So at the time of turning outer wheeis shifts little bit otside hence increase in diameter & at the same time inner wheel having portion of less diameter comes into action. So speed get adujested
Trains are quite different from cars or auto mobiles. The latter require differential gear mechanisms because they are frequently making radically sharp turns. In contrast trains are independent from one another therefore there is no place for turning stress to build. Besides, train tracks are usually turned in gentle arks.
The wheels of a train usually rotate at different speeds especially when they turn corners. The differential gear mechanism basically allows the vehicle to drive the wheels with the same force but at the same time they rotate at different speeds. In a train without the differential gear mechanism all the wheels will rotate at the same speed generally on a common axle which is driven by a chain drive mechanism. Thus while cornering the inner wheel will travel a shorter distance as compared to the outer wheel which will result in the outer wheel dragging and the inner wheel spinning. This will ultimately do much damage to the tires and roads, lead to unpredictable handling and put strain on the entire train.
The wheels of a train usually rotate at different speeds especially when they turn corners. The differential gear mechanism basically allows the vehicle to drive the wheels with the same force but at the same time they rotate at different speeds. In a train without the differential gear mechanism all the wheels will rotate at the same speed generally on a common axle which is driven by a chain drive mechanism. Thus while cornering the inner wheel will travel a shorter distance as compared to the outer wheel which will result in the outer wheel dragging and the inner wheel spinning. This will ultimately do much damage to the tires and roads, lead to unpredictable handling and put strain on the entire train.