an anthropomorphic steam locomotive. Clement Hurd’s illustrations show No. 9 to be nearly identical to a PRR class S1, except for its 4-6-2 “Pacific” wheel arrangement, making No. 9 considerably shorter than a 6-4-4-6 PRR class S1. There are Lionel and MTH models of 6100. The locomotive has appeared in train games like Trainz and Train Simulator Classic. See also PRR locomotive classification References S1 Streamlined steam locomotives 6-4-4-6 locomotives Duplex locomotives Experimental locomotives Individual locomotives of the United States Passenger locomotives Steam locomotives of the United States Railway locomotives introduced in 1939 Scrapped locomotives Unique locomotives Standard gauge locomotives of the United States Raymond Loewy