Oc15

 

 

KkStB 2201 (later 122.01, Mödling 7/1873), earlier KRB 49 ‘Eisenerz’, enjoyed the longest life: it was withdrawn by BBÖ in 1924. Location unknown, before 1904. Source: www.commons.wikimedia.org.

 

 

 

 

 

 

 

 

 

Austro-Hungarian locomotives taken over by PKP after WWI belonged to many distinct classes, some represented by single examples. Most of these untypical and often obsolete engines were soon withdrawn, disappearing from the company’s rosters before actual introduction of new designation system in mid-1920s. This refers also to two kkStB class 22 locomotives, which were probably assigned class designation Oc15 (according to KT). Re-numbering, if actually took place, was only formal.

KkStB class 22 numbered 31 passenger engines with the 1-2-0 axle arrangement in several versions, originally built for Carl Ludwigs-Bahn (CLB) and Kronprinz Rudolf-Bahn (KRB). Construction of the former began in 1858 and of the latter in 1868; they were absorbed by state railways in 1892 and 1884, respectively. KRB obtained first locomotives of this type in 1870 from Krauss Münich in 1870 (nine examples, class I, service numbers 31 through 47, odd only). In 1873 four more followed, this time from Mödlinger Lokomotivfabrik (service numbers 49 through 55, odd only). All were given individual names. Later they were numbered 2211 through 2219 (first batch) and 2201 through 2204 (second batch). In 1905 their class designation was changed to 122, as they differed in certain respects from class 22 (ex CLB). Almost all were withdrawn before the end of the war; the sole exception was 122.01 (Mödling 7/1873), which remained with BBÖ and was written off in 1924.

First batch for CLB numbered ten examples and was delivered between 1870 and 1871 by Esslingen; they were classed IId. Further eight engines, classed IIe, were built by Wiener Neustadt in 1878 (four) and 1882 (also four). They differed in minor details. Later they were numbered 22.31 through 48. Fifteen were withdrawn from use until 1915 and one, 22.45, perished in Russia. Two were probably abandoned in what became a part of Poland and taken over by PKP; these were 22.46 (WrN 2596/1882) and 22.48 (WrN 2598/1882). Little is known about their service and both were written off before 1927. No locomotive of this type has survived until today.

It should be noted that, due to differences between individual batches, kkStB undertook in 1892 a reconstruction program, with the aim of introducing some standardization. In particular, new boilers were fitted, with 165 flues and pressure increased to 10 bar. Ex-CLB locomotives were fitted with new axles and wheelsets. Data given below are for the last batch, built in 1882, after re-boilering.


 

Main technical data

 

No.

Parameter

Unit

Value

1.

Years of manufacture

-

1870 – 1882

2.

Total built / used in Poland

-

31 / 2

3.

Tender class

-

4.

Axle arrangement

-

1-2-0

5.

Design maximum speed

km/h

55

6.

Cylinder bore

mm

2 X 395

7.

Piston stroke

mm

632

8.

Engine rating

kW/hp

9.

Tractive effort

kG

10.

Boiler pressure

MPa

1.02

11.

Grate dimensions

m X m

1.64 m2

12.

Firebox heating surface

m2

7.5

13.

Distance between tube plates

mm

4 219

14.

Number of flue tubes

-

180

15.

Heating surface of flue tubes

m2

121.4

16.

Number of smoke tubes

-

-

17.

Heating surface of smoke tubes

m2

-

18.

Evaporating surface, total

m2

119.0

19.

Superheater heating surface

m2

-

20.

Diameter of drivers

mm

1574

21.

Diameter of idlers front/rear

mm

1 258 / -

22.

Total weight, empty

kg

33 400

23.

Total weight, working order

kg

38 100

24.

Weight on drivers, working order

kg

25 900

25.

Weight with tender, empty

kg

26.

Weight with tender, working order

kg

27.

Maximum axle load

T

28.

Axle base (with tender)

mm

10 395

29.

Overall length (with tender)

mm

30.

Brake type

-

 

 

 

References and acknowledgments

 

-       LP, KT vol. 1;

-       www.de.wikipedia.org.