Editing 4-6-2 (section)

===Russia/Soviet Union===
Pacifics were not common in Russia. The only known examples were the four-cylinder L class express passenger locomotives, built by the [[Kirov Plant#History|Putilov Works]] at [[Saint Petersburg]] for the [[Vladikavkaz Railway]] in 1914. The chief designer was Vazlav Lopushinskii, who later emigrated from Soviet Russia. These locomotives were the most powerful passenger locomotives in Tsarist Russia. Eighteen locomotives were built between 1914 and 1919, allocated to the [[Rostov-on-Don]], Tihoretskaya, Kavkazkaya, [[Armavir, Russia|Armavir]] and [[Mineralnye Vody]] depots. They hauled principal express and heavy passenger trains between Rostov-on-Don and Vladikavkaz, a distance of {{convert|698|km|mi|abbr=off}}. All were oil fired.

After the [[October Revolution]], a further 48 L class locomotives were built at Putilov Works between 1922 and 1926. At first, these coal fired locomotives were allocated to the [[Oktyabrskaya Railway|October Railway]] to haul principal passenger trains over a distance of {{convert|650|km|mi|abbr=off}} of double track line between the two largest cities in [[Russian Soviet Federative Socialist Republic|Soviet Russia]], Moscow and Leningrad. At the time, train speeds in Soviet Russia were slow and the fastest train took fourteen hours and thirty minutes between the two cities. The trains, which were running four return workings daily, were rather heavy with train loads often exceeding 700 metric tons behind the tender. In 1936, the express trains were running at an average speed of {{convert|65|km/h|mph|0|abbr=off}} with four intermediate stops between these cities. Locomotives were usually changed at [[Tver]].

When the production of the heavier [[2-8-4|{{nowrap|2-8-4}} Berkshire]] class IS [[2-8-4#Soviet Union|''Joseph Stalin'']] got under way in 1937, the Pacifics were modified from coal to oil firing and transferred to join other older locomotives on the [[North Caucasus]] lines, from where they worked as far south as to [[Baku]]. In 1941, seventeen locomotives were allocated to the [[North Caucasus Railway]], 29 to the [[Transcaucasus Railway]] and six to the Orenburg Railway. In 1942, during the German summer invasion into North Caucasus, all the class L Pacifics were evacuated from there to the Transcaucasus Railway. After World War II, in 1947, they were designated Lp class and were relieved from heavier duties. A number were withdrawn from service between 1956 and 1959. The last one, Lp class no. 151, was retired from [[Grozny]] depot in 1967.

In 1945, 34 Pacific locomotives of the [[Deutsche Reichsbahn]]'s [[DRG Class 03|Class 03]] and two streamlined [[DRB Class 03.10|Class 03.10]] Pacific locomotives fell into Russian hands in [[East Prussia]]. They were regauged to {{Track gauge|5ft|lk=on}} gauge and allocated to the [[Lithuanian Railways]], where they hauled express and passenger trains from [[Vilnius]] to [[Kaliningrad]] ([[Königsberg]]) and to [[Minsk]]. The last ones were withdrawn from service in 1957.<ref>V.A.Rakov (1995). ''Lokomotivy Otechjestvennyh Zhelenznyh Dorog''. Transport, Moskva. {{ISBN|5-277-00821-7}}</ref>