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PKP Class OKz32 is a Polish tank locomotive of Polskie Koleje Państwowe, designed for hauling passenger trains in mountain regions, built in 1934-1935. The designation stood for passenger (O) tank (K) 2-10-2 (z) steam locomotive accepted in 1932.

PKP OKz32
OKz32 locomotive
Type and origin Power type Steam Builder H. Cegielski – Poznań Build date 1934–1935 Total produced 25
Specifications Configuration: ​  • Whyte 2-10-2T  • UIC 1′E1′ h2t Gauge 1,435 mm (4 ft 8+1⁄2 in) standard gauge Leading dia. 860 mm (33.86 in) Driver dia. 1,450 mm (57.09 in) Trailing dia. 860 mm (33.86 in) Minimum curve 150 m (492 ft 2 in) Wheelbase:  • Engine 11.700 m (38 ft 5 in)  • Drivers 6.400 m (21 ft 0 in) Length 15.320 m (50 ft 3 in) Height 4.620 m (15 ft 2 in) Axle load 17 tonnes Loco weight 118.4 tonnes Fuel type coal Fuel capacity 6 tonnes Water cap. 10 m3 (350 cu ft) Firebox:  • Firegrate area 3.8 m2 (41 sq ft) Boiler pressure 15 kg/cm2 (1.47 MPa; 213 psi) Heating surface 184.1 m2 (1,982 sq ft) Superheater: ​  • Heating area 66 m2 (710 sq ft) Cylinders Two, outside Cylinder size 630 mm × 700 mm (24.80 in × 27.56 in) Valve gear Heusinger
Performance figures Maximum speed 75 km/h (47 mph) Power output 1,868 hp (1,393 kW) Tractive effort 17,200 kgf (37,920 lbf)
Career Operators PKP Class OKz32 Numbers OKz32-1 to OKz32-25 Locale Poland Preserved 1
Pokropiński 2007, p. 254

History

The locomotive was designed in Poland specially for passenger traffic on mountain route Kraków – Zakopane in Tatra Mountains.[1] It was constructed in H. Cegielski works in Poznań, under direction of Prof. Antoni Xsiężopolski. The first locomotive was made in 1934 and appeared successful. A series of 25 in total was built in 1934-1935 for Polskie Koleje Państwowe.[2] The locomotive could haul heavier trains (350 tonnes), than German-origin TKt1 and TKt2 (250 tonnes), and was faster.[2] They were also used with freight trains.[1]

During World War II 18 locomotives were captured by the Germans and impressed into service as DRG class 95³, with numbers 301 to 318 (two of them were first captured by the Soviets, then by the Germans in 1941).[2] Remaining 7 locomotives were seized by the Soviets in Poland and converted to broad gauge by 1941.[2] They served in Ural Mountains during the war. Along with further locomotives captured from the Germans, Soviet Union operated 11 locomotives after the war, until 1966.[3]

After World War II, Poland reclaimed 11 locomotives, receiving new numbers OKz32-1 to 11.[4] They served still until 1970s. One – OKz32-2 (former OKz32-5) was preserved, in Chabówka Railway Museum.[4] It was operable as of 2016.[5]

References

Wikimedia Commons has media related to PKP class OKz32.

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