TP1-1, the second prototype (illustrated right), under the name of Сталинец (Stalinets), was a cab-forward condensing 2-10-2 from the Kolomna works, used gas produced from an anthracite coal plant in the tender to fuel its spark-ignition internal combustion cylinders, along with anthracite pulverised in the gasification plant to heat the boiler.
TP1-1, the second prototype (illustrated right), known as Сталинец (Stalinets), was a cab-forward condensing 2-10-2 built at the Kolomna works. It utilized gas generated from an anthracite coal plant in its tender to power its spark-ignition internal combustion cylinders and heated the boiler with anthracite that had been pulverized in a gasification plant.