Pennsylvania Railroad H6

The Pennsylvania Railroad class H6, with its H6a and H6b subclasses, was a 2-8-0 Consolidation freight steam locomotive and the most numerous class on the railroad, with 1,707 units, making it the second most prolific 2-8-0 class in North America. In the 1920s, 699 of the H6a and H6b engines received superheaters and slightly larger cylinders and were reclassified H6sa and H6sb. They worked mainline freights, local freights and yard switching across the system, often double or triple headed up the steep Pennsylvania grades. About 1938 thirty H6sb engines were sold second hand to the South Manchuria Railway in Asia, where they were nicknamed Pensori. Number 2846, an H6sb built by Baldwin in 1905, is preserved by the Railroad Museum of Pennsylvania.