Editing 2-10-2 (section)

===Soviet Union===
In the Soviet Union, {{nowrap|2-10-2}} locomotives were used to haul heavy freight trains. Two series were relatively common, the [[Steam locomotive FD|FD (for Felix Dzerzhinsky)]] with more than three thousand built through the 1930s, and the LV (Lebedyansky, modified by the Voroshilovgrad plant).<ref>[http://htynf.zx6.ru/seriafd1.htm Russian article on the 2-10-2]</ref>

[[File:Parovoz_"Felix_Dzherzinski"_in_Brest_museum.jpg|thumb|left|[[Soviet locomotive class FD]] {{nowrap|2-10-2}} in [[Brest, Belarus|Brest]] museum]]
The FD class was developed from ALCO and Baldwin heavy freight locomotives that were imported to the Soviet Union, where they were designated as the Ta and Tb classes respectively. The first FD class locomotive was built at the Voroshilovgrad Locomotive Plant in 1931.

In 1932, the Voroshilovgrad plant began with the mass production of FD20 locomotives. In the process of production, their construction was improved constantly. Production was interrupted at the outbreak of the Great Patriotic war in 1941 and was only resumed in 1942, when four locomotives were built in Ulan Ude. The total production was 2,927 locomotives of FD20, and 286 locomotives of FD21. The two subclasses only differed in respect of their types of superheater.

[[File:OR18-01 at Lebyazhye Railway Museum, Leningrad Oblast, Russia.JPG|thumb|right|OR18-01 at [[Lebyazhye, Lomonosovsky District, Leningrad Oblast|Lebyazhye]] Railway Museum]]
In 1958, 1,054 FD class locomotives were sold to China, where they worked until the 1980s. A much lesser number were sold to North Korea at around the same time.<ref>[http://www.railography.co.uk/info/cn_steam/profiles/fd.htm Railography : Chinese Steam Profiles - FD Class 2-10-2]</ref>

The [[Soviet locomotive class LV]] was developed from the previous L class 2-10-0 locomotive by the Voroshilovgrad plant. It used a [[feedwater heater]] to increase [[thermal efficiency]] and was the most efficient freight steam locomotive in the Soviet Union, with thermal efficiency of 9.3%. The first prototype was named OR18-01 (October Revolution plant, 18 ton axle load). A total of 522 LV class locomotives were built. Several were preserved, including the first, OR18-01, and the last, LV-0522.