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what are the benifit of twin locos
Few points why KK is hauled by twin locos...
1.The most common reason is the need for additional motive power when a single locomotive is unable to haul the train due to uphill grades, excessive train weight, or a combination of the two.
2.Double-heading is also used on passenger trains when one locomotive could suffice but would not be fast enough to maintain the schedule.
it gives speed+reduce the load on single loco of trains which are having many coaches
Just for the sake of Pick-Up!!
The second Loco remain dead, after the train achieve its desired speed thru enhanced Pick-Up!!