Editing 2-8-4 (section)

===Czechoslovakia===

====Tank locomotives====
The [[Czechoslovak State Railways]] (CSD) was one of the largest tank locomotive users in Europe. The dense railway network in [[Bohemia]] and [[Moravia]] provided the ideal environment for local short-distance passenger train workings powered by numerous classes of tank locomotives. On 31 December 1937, the CSD had no less than 1,250 tank locomotives on its roster, of which 385 were eight-coupled tank locomotives.

The first Czechoslovakian 1’D2’t-h2 (2–8–4) tank locomotive was derived from the CSD Class 455.1 1’D-h2 (2–8–0) tender locomotive, with water tanks, a coal bunker and a trailing bogie added. Apart from changing the drive from the second to the third coupled axle and increasing the superheating surface of the boiler, these handsome tank locomotives were mechanically identical to the tender locomotives. They were originally intended to be used on the {{convert|167|km|mi|adj=mid|long|abbr=off}} [[Prague]] to [[České Budějovice]] (Böhmisch Budweis) line and on branch lines diverting from the mainline for local train service. At the time, however, the 16 ton axle load proved to be too high for most of the lines where they were intended to run and for this reason only 27 locomotives were built between 1928 and 1932.

The first thirteen were initially designated Class 446.0, but an increase in their permitted maximum speed to {{convert|80|km/h|mph|abbr=off}} led to the locomotive's reclassification to Class 456.0, numbered 456.001 to 027. These were powerful tank locomotives, nicknamed ''Krasin'' after the explorer General Nobile who reached the [[North Pole]] in 1928. When tested while hauling a 900-ton train, one reached a maximum speed of {{convert|90|km/h|mph|abbr=off}} at level and an average speed of {{convert|32|km/h|mph|abbr=off}} while climbing a 1 in 100 gradient.

Between 1938 and 1945, all of them remained on the ''Böhmisch-Mährisch Bahn'' (BMB) and ''Protektorátni Drahy Cech a Moravy'' (CMD) lines in Bohemia and Moravia, and all 27 survived the Second World War. By the early 1960s, the Class 456.0 locomotives were spread thinly over most of the country, having been allocated to locations from [[Plzeň]] in western Bohemia to [[Banská Bystrica]] in [[Slovakia]]. All were withdrawn from service between 1968 and 1972. One, no. 456.011, went into industrial service and three others, numbers 456.015, 024 and 026, were later used as mobile boilers. The remainder were scrapped.

====Tender locomotives====
The CSD ordered three Class 486.1 1’D2’-h3 (2–8–4) locomotives, based on the three-cylinder Class 114 locomotive of the [[Austrian Federal Railways]] (BBÖ). This hand-fired locomotive had a [[Krauss-Helmholtz bogie|Krauss-Helmholtz]] leading truck and the diameter of its coupled wheels was {{convert|1830|mm|in|0|abbr=off}}. Its total weight in working order was 107.6 tons, of which 63.9 tons were adhesive weight. All three cylinders were of {{convert|550|mm|in|2|abbr=off}} bore with a {{convert|680|mm|in|2|abbr=off}} stroke. The heating surface of the boiler was {{convert|253.2|m2|ft2|2|abbr=off}}, of which {{convert|105.6|m2|ft2|2|abbr=off}} were superheating area. The grate area was {{convert|5|m2|ft2|2|abbr=off}} and the locomotive was designed for possible coal dust firing. They had Class 926.0 tenders, which were rebuilt from Class 623.0 tenders.

They were not as successful as expected. One of the Class was tested against a Class 486.0 2’D1’-h3 ([[4-8-2]]) locomotive on the {{convert|248|km|mi|abbr=off}} hilly mainline between [[Žilina]] and [[Košice]] on the former [[Košice]]-[[Bohumín]] Drahy (KBD) line. It proved to be inferior to its opponent in both speed and power.

All three locomotives were allocated to the [[Brno]] shed for most of their active service lives. During the years from 1938 to 1945, they were rostered as BMB-CMD locomotive stock. They were withdrawn from service in 1967 and 1968 and were later used as mobile boilers.