| History - Burnham & Wms Co (Baldwin), 6/1902 Original Compound Specs - serial #20621, S4 class, 63" drivers, 200 psi boiler pressure, 15.5x30" high pressure cylinders, 26x30" low pressure cylinders, engine weight of 190,450 lb, tractive effort of 28,698 lb. In 1928, the Northern Pacific rebuilt the loco as a simple expansion version and superheated them. This rebuild increased the tractive effort to 35,700 lb. No photographer was listed. |