रेलफैनों की तो बात ही कुछ और है

Yes the Power Output and Tractive effort is very less due to light coaches and Motor coaches use very less TE to run the train as they combine the effort, from all ends and middle of the train. They should have done this long back, this technology is popularly being used in high speed trainsets such as bullet train where Motor Coach=Power car.
They should do this with Intercity expresses having short rake.

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