Pennsylvania Railroad J1

The Pennsylvania Railroad class J1 was a heavy freight steam locomotive of the 2-10-4 Texas type, built between 1942 and 1944. Wartime restrictions barred a new design, so the railroad borrowed a Chesapeake and Ohio 2-10-4 and a Norfolk and Western articulated engine, tested both, and adopted the Chesapeake and Ohio design almost unchanged, with Baker valve gear and a radial-stay firebox instead of its usual Walschaerts gear and Belpaire box. A total of 125 were built at the Altoona works, known as the War Babies, with over 95,000 pounds-force of tractive effort plus a booster. All were scrapped in 1958 and 1959.