Serbia-Herzogovina 2-6-2 Locomotives in Yugoslavia

Class 01 (Locobase 1712)

Data from "Lokomotivska serja 01", 1955 Skice Podaci Locomotiva, p 3; and A[nthony] E[dward] Durrant, The Steam Locomotives of Eastern Europe (Newton Abbot:David & Charles, 1966), p. 129. See also "JDZ 01" for the description of the streamlined 101 on the KOSRail website at [], last accessed 28 January 2023. Schwarzkopff began the class with works numbers 4870-4875 in 1912, 7911-8002 in 1922, and 8138-8157 in 1923. Karlsruhe works numbers were 2244-2262 in 1922 (road #1083-1100).

Based on a Serbian railways design, these went into production after Serbia and other Balkan countries were combined as Yugoslavia (i.e., South Slav country). The impetus for producing 120 of these superheated Prairies was a victors' demand for reparations from the Central Powers after World War I.

Tests of the 101 fitted with a streamline casing yielded a top speed of 146 kph (91 mph) on the mainline between Belgrade and Zagreb. A relatively simple design, the casing featured sloping sides from boiler top to running board and a slightly bulged smokebox shield.

[NB: When the JDZ used tube and flue inside diameters (45 and 127 mm, respectively) to calculate tube heating surface areas, tube heating surface amounted to 1,200 sq ft (111.48 sq m) and when firebox heating surface area was added, total EHS was 1,382 sq ft (126.50 sq m). Locobase uses the external diameters to allow direct comparison with Anglo-American locomotives.]

Renumbered 26.001-100 in 1933. The class operated into the 1960s.