destroying points of the switches it passed over. It was too big to fit on the turntables, too powerful for the couplers in use at the time and unable to run at full power for very long due to the poor-grade coal being insufficient to provide full steam capacity for the massive boiler. The AA20-1 made one publicity trip to Moscow in 1935 before being put into storage at the Shcherbinka test facility (potentially as an instructional tool) and finally scrapped in 1960, though this was not stated publicly. See also History of rail transport in Russia Russian Railway Museum, Saint Petersburg References External links Stalin's Engine: The AA20 14,4-14-4 Steam locomotives of the Soviet Union Scrapped locomotives