ONE OF THE MOST distinctive experimental locomotives of the 1930s was the Pennsylvania Railroad’s S1-class Duplex-drive 6-4-4-6 locomotive. Originally developed as a replacement for the railroad’s venerable K4s 4-6-2 Pacific locomotives, the big S1, of which only one was built, was designed to be a high-speed passenger engine, capable of hauling a 1,200-ton train at […]
MTH Premier line O gauge Pennsy. RR S1 6-4-4-6
