page_title: DRB Class 50
section_title: DR Class 50.35-37
hierarchical_section_title: DRB Class 50 / DR Class 50.35-37
caption_attribution_description: Deutsch: DR 50 3648 zum Dampflokfest in Dresden von der Nossener Brücke aus. English: Steam Locomotive DR 50 3648-8.
context_page_description: The DRB Class 50 is a German class of 2-10-0 locomotive, built from 1939 as a standard locomotive for hauling goods trains. It had one leading axle and five coupled axles and was one of the most successful designs produced for the Deutsche Reichsbahn.
  This class was procured as part of the German Nazi party's preparations for war that led into the Second World War. Up to 1948, 3,164 Class 50 engines were built by almost all the European locomotive factories – towards the end as so-called provisional war locomotives and classified as 50 ÜK.
  At the end of the steam locomotive era they became virtually a universal class of mixed-traffic steam engine that, thanks to their low axle load could even be employed on branch lines with light track beds. The Deutsche Bundesbahn grouped the locomotives into Classes 050, 051, 052 and 053 from 1968 so that the numbers were computer-compatible.
  Some of the class were used by the Polish State Railways as type Ty5.
context_section_description: At the end of the 1930s, it was thought that a suitable boiler material had been found, in the form of St 47 K-Mo steel, that would allow boiler pressure to be increased to 20 bar without significantly raising the total weight of the boiler. The newly developed steel had a higher strength than the type of steel (St 34) used hitherto, but its disadvantage was that it had considerably worse conductivity. In the harsh everyday work of steam locomotives the material became very quickly fatigued, so that boilers made of the new steel had to be replaced after only a few years. The Class 50, too, was given such a boiler to begin with. Even though its condition was less critical than with other classes, it urgently needed replacing by the end of the 1950s. As a result, the DR in East Germany had the 50E  replacement boiler developed on the basis of the new boilers equipping the Class 23.10 / 50.40, although because the locomotive frames were different it was given a 500 mm longer boiler barrel. This was later used on the rebuilds (the so-called Rekoloks), which saw the conversion of Class 23 engines, as well as conversions of the Class 52s into 52.80s and the Class 58s into 58.30s. Between 1958 and 1962, 208 Class 50 locomotives were given such a boiler, along with a mixer preheater, a larger radiative heating area and improved suction draught, which also raised its performance. Many engines were also equipped with Giesl ejectors. These Reko locomotives were allocated to sub-class 50.35 and given operating numbers 50 3501 to 50 3708. In their last years of operation these engines often ran with the new 2'2' T 28 tenders.
  The engines were soon gathered together in the railway divisions of the northwest. After the conversion of engines to oil-fired Class 50.50, the remaining coal-fired ones were concentrated in the Magdeburg division. Replacing older locomotives as well as oil-fired ones, they returned to the Dresden and Schwerin divisions again by the end of the 1970s.
  The last regular standard gauge steam train was hauled by a Class 50.35 locomotive. This was number 50 3559, which headed an official farewell service on 29 October 1988 on a round trip from Halberstadt to Magdeburg, Thale and back to Halberstadt. No. 50 3559 is used in Liblar as a restaurant.
  There are several Class 50.35 locomotives, several of them still working, belonging to Deutsche Bahn AG and the many  museum railways and railway museums, such as numbers 50 3501, 50 3539, 50 3564, 50 3576, 50 3616, 50 3648, 50 3654, 50 3695 and 50 3708.
caption: 50 3648-8 in Dresden Alt shed
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