The Pennsylvania Railroad class HH1 comprised six ex-Norfolk and Western Railway Y3 class 2-8-8-2 steam locomotives.
History
The HH1's roots trace back to the Norfolk & Western Railway, where they had once been in charge of general merchandise freight traffic and subsequently helper service. The Pennsylvania Railroad bought six of the N&W class Y3s in 1943. They were used in general freight traffic and helper service on the Pennsylvania Railroad similar to their lives on the Norfolk & Western. They were generally found west of Altoona, Pennsylvania. But their lives on the Pennsylvania were short lived, due to J1 2-10-4, and by 1951, most of them were scrapped.
References
PRR HH1 Wikipedia(Text) CC BY-SA