F ive Alco locomotives no one wanted: In the annals of locomotive history, there are a great many success stories. T he GP7, the U25B, and the SD40-2 spring to mind for many railfans. But among ...

EMD SD70M Demonstrator 2 Drive the EMD SD70M Demonstrator unit 7013. With the introduction of the SD70M locomotive, the first three of the type were used by EMD as 'demonstrator' units ...