PKP series Os24
| PKP Os24 DR 33.2 |
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|---|---|
 Os24-7 (incorrectly labeled as Os24-10, originally Os24-39) in the Warsaw Railway Museum
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| Numbering: | PKP Os24-1 to -60 DR 33.201-216 |
| Number: | 60 |
| Manufacturer: | Fablok |
| Year of construction (s): | 1925-1927 |
| Retirement: | 1970 |
| Type : | 2D h2 |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 20,730 m |
| Height: | 4,650 m |
| Total wheelbase: | 9,540 mm |
| Service mass: | 90 t |
| Friction mass: | 59.4 t |
| Top speed: | 90 km / h |
| Driving wheel diameter: | 1,750 mm |
| Impeller diameter front: | 1,000 mm |
| Control type : | Heusinger (Os24-20 Lentz valve control) |
| Cylinder diameter: | 615 mm |
| Piston stroke: | 660 mm |
| Boiler overpressure: | 14 bar |
| Heating pipe length: | 5,200 mm |
| Grate area: | 4.55 m² |
| Tubular heating surface: | 202.24 m² |
| Superheater area : | 75.5 m² |
| Water supply: | 27.0 m³ |
| Fuel supply: | 7.44 tons of coal |
The PKP series Os24 was a passenger train - steam locomotive series of the Polish State Railways (PKP). The 60 copies of the series were built between 1926 and 1927, the last ones were taken out of service in 1970.
history
After the First World War , the vehicle fleet of the newly founded PKP consisted of a large number of series, mainly of Prussian , Austrian and Russian origins, some of which were only available in small numbers. Nevertheless, there was initially a lack of locomotives. In order to reduce this and the high maintenance costs associated with the large number of series, the PKP soon began to procure new locomotives. Initially, the PKP refrained from the time-consuming development of its own series and procured various proven designs of American, Prussian and Austrian origin, which were only slightly modified for their own purposes.
As a model for a powerful passenger locomotive, which could be used in rapid rail system and the PKP chose in Achsfolge 2'd running number 570 of the Southern Railway from 1915 and their 1923 produced further than BBÖ 113 by the Federal Railways Austria (BBÖ) and acquired a license to do so. The Os24 only differed in details from their models. Fablok in Chrzanów delivered a total of 60 locomotives of this series between 1925 and 1927.
The PKP used the locomotives on the long routes in eastern Poland , especially before the long-distance passenger trains that often take on express train tasks there. This area of operation meant that after the attack on Poland in 1939 only ten locomotives of this series came to the Deutsche Reichsbahn . This classified the locomotives in 1941 in the class 33.2, they were given the numbers 33 201-210 . The area of operation remained largely the same, unlike the PKP series Pt31 , for example , the Os24 remained in Poland and were used by the Eastern Railway in the Generalgouvernement until at least 1943 . The remaining locomotives were in the eastern Polish territories occupied by the Soviet Union in 1939 and were taken over by the Soviet railways . After the German attack on the Soviet Union in 1941, this was able to bring most of the locomotives to safety before the Wehrmacht seized them, only six more Os24s added to the ten existing on the Eastern Railway. In the further course of the war, the Ostbahn gave some of the locomotives of this series to the Reich; towards the end of the war they were mainly used on Austrian routes.
After the end of the war, the majority of the locomotives remained in the Soviet Union. The locomotives located in Austria were confiscated by the USSR as spoils of war and returned to the PKP in 1948. This renumbered the remaining 15 locomotives as Os24-01 to -15 and used them until the end of the 1960s. The last copy of the Os24-7, which was taken out of service on April 17, 1970, is, albeit with the wrong number Os24-10, as a museum locomotive in the Warsaw Railway Museum .
literature
- Andreas Knipping, Ingo Hütter, Hansjürgen Wenzel: Locomotives "Home to the Reich" . EK-Verlag, Freiburg 2009, ISBN 978-3-88255-131-0 , pp. 340–341
