Is there a physical limit for the length of a train?

Question

Assume you can hook every locomotive and car Union Pacific owns up into a single gigantic freight train. Safety and laws aside, would it work?

In: Physics

Answer 1

There is a physical limit to each engine and the amount of work it can do.

Yes there would be an upper limit if you mean engines up front.

No there wouldn’t be if you can place engines wherever you want. It would effectively be like long trains tailgating each other if you do that. So no limit then.