DRB Class 41
| Company type | Steam locomotive |
|---|---|
| Industry | Rail transport |
| Founded | 1937 |
| Founder | Berliner Maschinenbau (BMAG) |
| Headquarters | Germany |
| Products | Standard freight steam locomotives (Einheitslokomotiven) |
Overview
The Class 41 steam locomotives of Germany were designed as standard freight engines, known as Einheitslokomotiven, utilized by the Deutsche Reichsbahn (DRB). Their production spanned the years 1937 through 1941.
History
In 1934, the Deutsche Reichsbahn-Gesellschaft (DRG) sought a new, high-speed freight locomotive and found the proposal from Berliner Maschinenbau (BMAG, previously known as Louis Schwartzkopff) for a 2-8-2 (1Template:PrimeD1Template:Primeh2) configuration particularly appealing. This design, developed by Friedrich Wilhelm Eckhardt (1892–1961), diverged from the DRG’s initial specification for a 2-8-0 (1Template:PrimeD) locomotive. The reason was that achieving the required performance with an 18-ton axle load was more feasible using a 2-8-2 wheel arrangement rather than the originally intended 2-8-0. Sticking rigidly to the original specification would have resulted in a new locomotive offering little improvement over the soon-to-be-retired Prussian freight engines. Ultimately, the Reichsbahn Central Office Engineering Works (RZM) endorsed BMAG’s concept, commissioning them to develop and build two prototypes.
The two prototypes, numbered 41 001 and 41 002, were delivered to the DRG in January 1937. After extensive trials, they were acquired by the DRG. These initial locomotives quickly demonstrated their capabilities, impressing with their power output, operational performance, smooth ride quality, and excellent acceleration.
The Class 41's development underscored the financial benefits of standardization embodied in the concept of standard locomotives (Einheitsloks). For instance, utilizing components shared with concurrently developed classes such as 03, 06, and 45 helped keep production costs below 10,000 Reichsmarks.
Beginning in October 1938, full production of Class 41 locomotives commenced under orders placed by the renamed (since February 1937) Deutsche Reichsbahn (DRB). Germany’s leading locomotive manufacturers all contributed to their construction, including BMAG, Borsig, Maschinenfabrik Esslingen, Henschel & Sohn, Arnold Jung Lokomotivfabrik, Krauss-Maffei, Krupp, Orenstein & Koppel, and Schichau.
Production models differed from the prototypes by omitting counter valve pressure compensators; instead, they employed Nicolai pressure compensating tubular valves—later known as Karl Schultz valves—to improve ride quality when operating without load. Additionally, on the valve gear, the costly-to-manufacture Kuhn slides present on prototypes were replaced by a standard lifting link (Hängeeisen).
Like Classes 03, 45, and 50, these locomotives featured a boiler rated at 20-bar (290 psi), constructed from St 47 K steel. This material proved prone to rapid aging and embrittlement, leading to significant issues. By 1941, the DRB mandated lowering the allowable operating pressure to 16 bars (232 psi) to mitigate boiler wear.
The locomotive's axle load could be adjusted between 18 t and 20 t by repositioning bolts within different sockets on the equalising beams. This feature was intended to enhance operational flexibility; however, it was rarely utilized. Both the Deutsche Bundesbahn and East German DR opted to maintain the bolts set for an 18 t axle load.
Except for the prototypes, all locomotives were paired with 2Template:Prime2Template:Prime T 34 tender types. The prototypes themselves came equipped with 2Template:Prime2Template:Prime T 32 tenders at delivery. Additionally, evidence from their use on 20-metre (65 ft 7 in) turntables indicates some units operated with 2Template:Prime2 T 30 tenders.
With wartime conditions increasingly limiting procurement of fast freight locomotives, all outstanding orders were ultimately cancelled in January 1941. The last Class 41 engine was delivered on June 2, 1941 by MF Esslingen—numbered 41 352—bringing total production to 366 units within just under four years.
Preserved locomotives
Following the Second World War, 216 locomotives were integrated into the Deutsche Bundesbahn fleet, while 122 remained with the DR in East Germany. Additionally, records indicate that 22 engines stayed within the former Reichsbahn division of Breslau in Poland, subsequently becoming part of the Polish State Railways (PKP) under the designations Ot 1-1 to Ot 1-19. Locomotive number 41 153 was registered with the Czechoslovak State Railways (ČSD) post-1945. Other units, including 41 034 and several others (41 076, 41 082, and 41 312), which were part of locomotive transfers (reparations), remained within the Soviet State Railway (SZD) territory before later being handed over to PKP. The disposition of some locomotives remains undocumented.
The two prototype engines assigned to the Schneidemühl (now Piła) locomotive shed, where they hauled express livestock trains bound for Berlin, earned the nickname Ochsenlok (Oxen loco) due to their service role.
DB rebuild
Because metal fatigue affected the boilers of these locomotives, extensive repairs commenced during the 1950s. Between 1957 and 1961, a total of 107 units received fully welded boilers similar to those used on the Class 03.10. Modifications also included replacing the front section of the frame and updating the running plate. Forty locomotives underwent conversion to oil-firing using heavy oil fuel. From 1968 onward, these rebuilt machines were reclassified as Class 042. The final Class 042 steam engines were withdrawn from service in 1977 at the Rheine locomotive depot. The accompanying photograph displays one preserved as a museum piece, now bearing its original Class 41 designation prior to the 1968 change.
Preservation efforts have saved former DB locomotives 41 105 and 41 241, both maintained by Stoom Stichting Nederland in the Netherlands as representatives of their series. Locomotive number 41 018 remains operational under the ownership of the Munich Steam Locomotive Company and is housed at the Augsburg Railway Park. Number 41 113 is exhibited at the Technical Museum in Sinsheim. The Osnabrück Steam Engine Friends are actively restoring 41 052 to working order after it stood for many years as a monument in Osnabrück-Schinkel. Number 41 096 is preserved in operational condition at Klein-Mahner, while 41 360 is operated by Dampflok-Tradition Oberhausen e.V., offering an extensive schedule of journeys on the Deutsche Bahn network since steam locomotive operations were permitted again.
- 41 018 oil-fired Dampflok-Gesellschaft München e.V.
- 41 096 oil-fired Dampflok-Gemeinschaft 41 096 e.V.
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DR Class 41 and DR Rekolok
The DR encountered significant challenges with boilers constructed from St 47 K steel. Although lowering the boiler pressure from 20 to 16 bar helped reduce the frequency of damage, it did not eliminate the issue entirely. By 1955, out of 112 locomotives in the DR fleet, only a dozen had been outfitted with the safer '1943 Type' replacement boilers. However, problems with St 47 K boilers escalated sharply. Attempts at repair welding failed to resolve the issues and instead increased brittleness, raising the risk of cracks and potential boiler explosions. This problem was not confined to the Class 41 alone; locomotives from Classes 03, 03.10, and 50, which also utilized non-aging St 47 K boilers, suffered similar vulnerabilities. Due to these escalating difficulties, more than 300 locomotives were withdrawn from service in 1956, causing a severe shortage of engines. This urgent situation ultimately prompted the development and procurement of a new boiler type (later designated as 39E), which—with minor adaptations—was also compatible with Classes 03, 03.10, and 39.
Delays in delivering the new boilers meant that by January 1959, 21 Class 41 locomotives received replacement boilers replicating the older design. The Meiningen repair facility even produced an exact copy of the previous boiler for locomotive 41 075. Other damaged boilers underwent complete refurbishment with many components replaced.
Meanwhile, DR engineers advanced plans for a "reconstruction programme aimed at revitalizing the steam locomotive fleet." This initiative included modernizing 102 Class 41 engines. The German term for this process was Rekonstruktion, commonly shortened to Reko, which gave rise to the designation Rekolokomotiven or Rekoloks for these rebuilt locomotives.
Disputes over jurisdiction, disagreements on reconstruction specifics, and ongoing delays in receiving the Reko boilers postponed commencement of the programme. It was only after a catastrophic boiler explosion on locomotive 03 1046’s St47K boiler in 1958 at Wünsdorf that Transport Minister Erwin Kramer (1902–1979) applied pressure to initiate the Reko efforts.
Starting in 1959, eighty Class 41 locomotives underwent fitting with new 39E Reko boilers at the Reichsbahn repair workshops in Zwickau and Karl Marx Stadt (known as Reichsbahnausbesserungswerke or RAW).
The rebuild included installation of IfS/DR mixer preheaters, pressure-compensated piston valves (Trofimoff valves), and new-style Stühren ash pans. The wider outer firebox necessitated redesigned front walls on the driver's cab, whose front windows were equipped with demisting devices. The larger and heavier VMP 15-20 compounded mixer pump (Verbundmischpumpe) required construction of a new mounting bracket. This modification alongside the updated mixer preheater system led to a rearrangement of the main air reservoir placement. Despite these changes, the outside cylinders, measuring 520 mm (20 in) in diameter and originally intended for boilers operating at 20 bar pressure, remained unchanged. During this reconstruction phase, brakes on the leading carrying axle were removed.
The installed 39E combustion chamber boiler can produce up to fifteen tons of steam per hour due to its enhanced balance between radiative and tube heating surfaces. This output surpasses that of newer DB boilers, which generate approximately thirteen point three tons per hour. Equipped with this boiler, locomotives exceeded their original performance targets set for twenty bar boilers despite retaining relatively small cylinders.
Locomotives rebuilt under this programme are classified as Rekolokomotiven. Following their conversion, all Class 41 engines received an additional digit '1' in their numbering under the DR’s 1970 renumbering scheme—for example, locomotive number 41 122 was renumbered as 41 1122-5. Unlike other classes, no separate subclass distinguished between reconstructed and original versions within Class 41.
Class 41 Rekoloks remained active in regular service until 1988. The second oil crisis during 1979/80 and its adverse impact on the GDR economy prompted a temporary resurgence of these locomotives in operation. Several units initially slated for scrapping were refurbished with renewed general inspections conducted by Meiningen workshop between 1980 and 1983—totaling twenty-three overhauls. By late September 1984, locomotives from Oebisfelde depot were withdrawn and transferred to Güsten shed. Subsequently, Göschwitz station (a branch of Saalfeld depot) began sending its Class 41s to storage sidings in November 1986. The final regular service run by a Class 41 locomotive occurred in early May 1988 when number 41 1231 was retired from Staßfurt depot (Bw Güsten).
Amongst DR’s steam fleet, Class 41 stood out as its most adaptable locomotive type—capable of hauling prestigious express trains as well as freight and passenger services.
Locomotive number 41 1185 has been preserved as a DR heritage engine and is currently owned by the Nuremberg Transport Museum.
An additional eight reconstructed locomotives exist today in varying conditions of restoration; refer to the list of preserved steam locomotives in Germany for details.
List of preserved locomotives
The following locomotives have been conserved and are available for exhibition. Among these, three remain operational. Additionally, eight Rekolokomotiven exist in various phases of restoration. For more details, refer to the list of preserved steam locomotives in Germany.
- 41 1144-9, IGE "Werrabahn Eisenach" (Eisenach); currently operational and active,
- 41 1150-6, Bavarian Railway Museum (Nördlingen); operational though the HU inspection certificate has lapsed,
- 41 052, Osnabrücker Dampflokfreunde (Osnabrück); under renovation as of 2022,
- 41 096, Dampflok-Gemeinschaft 41 096 (Klein Mahner); HU inspection certificate expired,[1]
- 41 105, Stoom Stichting Nederland SSN (Rotterdam),
- 41 241, Veluwsche Stoomtrein Maatschappij VSM (Beekbergen); operational using coal,
- 41 271, Rendsburger Eisenbahnfreunde (Neumünster),
- 41 360, Eigentümergemeinschaft (Oberhausen); currently inaccessible with expired HU inspection certificate; stored following bankruptcy,
- 41 1231-4, Traditionsbetriebswerk Staßfurt,
- 41 024, Darmstadt-Kranichstein Railway Museum,
- 41 018, Munich Steam Locomotive Company, located at Bahnpark Augsburg (operational),
- 41 226, Tuttlingen Railway Museum,
- 41 364, Owned by Bayernbahn and loaned to the Bavarian Railway Museum (Nördlingen),
- 41 073, EBM Heilbronn,
- 41 186, EBM Dieringhausen,
- 41 113, Technikmuseum Sinsheim.
Video
See also
References
- ↑ Kjell Sonnemann: 440 Passagiere fahren ein letztes Mal mit der Dampflok durch die Region. in: Salzgitter-Zeitung, 27. März 2018
- Steam locomotives of Germany
- 2-8-2 locomotives
- Deutsche Reichsbahn-Gesellschaft locomotives
- Henschel locomotives
- Krauss-Maffei locomotives
- Krupp locomotives
- Railway locomotives introduced in 1937
- Borsig locomotives
- Arnold Jung locomotives
- Berliner locomotives
- Esslingen locomotives
- Standard-gauge locomotives of Germany
- 1′D1′ h2 locomotives
- Freight locomotives
- Schichau-Werke locomotives
- Orenstein & Koppel locomotives