08/19/2026
"Distributed Power" is definitely a thing these days, and additional locomotives added throughout a long freight train go back to the steam days (then, usually right in front of, or behind, the caboose in addition to extra locomotives added on the front.
With the coming of diesels, freight trains grew longer, and -- especially in the mountains of the west, it was not uncommon to see multiple locomotives on the front, two or three addtional engines working in the middle of the train, and another one or two pushing, on the end.
Once all manned by crews, these "distributed" locomotives adapted to advancing technology: radio control for them -- tucked into the extra-long nose of a fitted locomotive, or perhaps in a special car added to the engines in the middle/end -- let one crew in the front control the whole power. (This took skill as long trains might have part of the train going uphill, part going downhill, and part in a curve and part not, at any given time -- so the physics of thousands of moving tons of freight and equipment could be daunting).
Later, newer technology made the "snoot" locomotives and remote robot control cars unnecessary.
Today a crew may sit in the cab of a single locomotive operating a mile-long train. At the other end, where the caboose once was found, a second locomotive or two, perhaps facing backwards, is pushing, as well. Nobody is on board, as the single hand on the throttle at the front controls both 200-ton behemouths.
*** Here on this small home HO model railroad, "distributed power" is achieved by placing a free-rolling unpowered engine in the train. (Care must be taken that the wheel assemblies/trucks turn freely, and do not catch the frame of the locomotive above them -- and that the engine wheels turn easily enough so that there is not too much drag).
If you really want to see "distributed power done right, come visit our Museum on a Tuesday night or an Open Saturday. Multiple modern hi-tech HO locomotives with DCC power operate as one as they are spaced throughout the train.