It will pull 10 cars. They cover the 50k easily just on weekends. Trains are a passion for many,especially the old steam driven ones.
I was talking to an Amtrak conductor one day and he said that the modern diesel-electric engines will easily pull 8 or more cars. The problem, he said, was that the generators are only designed to power 4 cars. They are usually pulling 6 cars and it taxes the generators.