Pennsylvania Railroad N1s

The Pennsylvania Railroad N1s was a class of 60 heavy drag freight steam locomotives of the 2-10-2 Santa Fe wheel arrangement, built for the Lines West between December 1918 and November 1919 by Alco and Baldwin from a design of the railroad's Fort Wayne Shops. They hauled heavy mineral freight to and from the Great Lakes ports on easy grades, rated at 6,000 short tons, and carried a Belpaire firebox with the largest boiler then used on a non-experimental Pennsylvania engine, a mechanical stoker and power reverse. Limited to 35 miles per hour, they resembled the I1s Decapod but had less tractive effort. They were the first large power withdrawn after diesels arrived, and all were scrapped by 1950.