DRG Class 44

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DRG Class 44
Dampflok 044 389-5.JPG
044-508 at Essen main railway station
Quantity 1,989
Year(s) of manufacture 1926–1949
Wheel arrangement 2-10-0
Axle arrangement 1'E h3
Type G 56.20
Track gauge 1,435 mm (4 ft 8 12 in)
Length over buffers 22,620 mm (74 ft 3 in)
Height 4,550 mm (14 ft 11 in)
Wheelbase 3,400 mm (11 ft 2 in)
Overall wheelbase 9,650 mm (31 ft 8 in)
Service weight 110.2 t (108.5 long tons; 121.5 short tons)
Adhesive weight 95.9 t (94.4 long tons; 105.7 short tons)
Axle load 19.3 t (19.0 long tons; 21.3 short tons)
Top speed forward 80 km/h (50 mph)/70 km/h (43 mph)
back 50 km/h (31 mph)
Indicated Power 1,405 kW (1,910 PS; 1,884 hp)/1910 coal
1,545 kW (2,101 PS; 2,072 hp)/2100 oil
Driving wheel diameter 1,400 mm (55.12 in)
Leading wheel diameter 850 mm (33.46 in)
No. of cylinders 3
Cylinder bore 550 mm (21.65 in) (44 001–44 010: 600 mm or 23.62 in)
Piston stroke 660 mm (25.98 in)
Boiler Overpressure 16 bar (1,600 kPa; 230 psi)
Grate area 4.55 m2 (49.0 sq ft)
Superheater area 100.00 m2 (1,076.4 sq ft)
Evaporative heating area 237.67 m2 (2,558.3 sq ft)
Tender 2'2' T 32/34, a few with tub tenders
Water capacity 32.0 m3 (1,130 cu ft)/34.0 m3 (1,200 cu ft)
Fuel 10.0 t (9.8 long tons; 11.0 short tons) coal
Brakes automatic, single-chamber Knorr compressed-air brakes
Auxiliary brake yes
Parking brake yes
Train control Walschaerts valve gear
Features 44 004, 44 009 and, periodically, others had Riggenbach counter-pressure brakes

The Class 44 (German: Baureihe 44 or BR 44) was a ten-coupled, heavy goods train steam locomotive built for the Deutsche Reichsbahn as a standard steam engine class (Einheitsdampflokomotive). Its sub-class was G 56.20 and it had triple cylinders. It was intended for hauling goods trains of up to 1,200 tonnes (1,200 long tons; 1,300 short tons) on the routes through Germany's hilly regions (Mittelgebirge) and up to 600 tonnes (590 long tons; 660 short tons) on steep inclines.

History[edit]

The first 10 examples were built in 1926. These engines had a somewhat higher steam consumption than the first ten units of the DRG Class 43 procured in parallel for comparison purposes, and which were equipped with two cylinders. Not until 1937 were further 44s procured, because by then the rising demands of rail transportation could be better met with a triple-cylinder configuration.

From 1926 to 1949, a total of 1,989 locomotives were manufactured. During the Second World War an austerity variant was built with simplified construction and delivery, known as the Class 44ÜK (one of the so-called Übergangskriegslokomotive). This primarily used home-produced materials; components were simplified, both in manufacturing methods and design, or left out completely. The most striking features of the ÜK locomotives were the omission of the smoke deflectors (that from 44 013 was standard) and also the forward side windows of the driver's cab.

After the war, Class 44 locomotives remained with the following railway administrations:

The Austrian Federal Railways (ÖBB) gave 9 engines back to the Deutsche Bundesbahn (DB) in 1952. The DB transferred at least 291 engines to the French railways SNCF as reparations. These were predominantly locomotives that had been built in France. The SNCF sold on 48 engines in 1955 to the Turkish State Railway (TCDD).

DB 044 014-9 on the turntable at Trier, Easter 1972

Until their replacement by modern diesel and electric locomotives, the Class 44 engines were the backbone of heavy goods train duties in Germany.

German railwaymen nicknamed the Class 44 locomotive the "Jumbo" because of its power. Only the rebuilt (Reko) locomotives of East Germany's Class 58.30, converted between 1958 and 1962, attained the performance of the Class 44s, at least on the plains.

Construction[edit]

A Class 44 cylinder and section of locomotive frame
Driving axle of a Class 44

The top speed of the standard variant was 80 km/h, the prototypes (44 001 to 44 010) were permitted to run at 70 km/h. The engine is designed as a 3-cylinder locomotive with one cylinder located in the middle. The outside cylinders drive the third axle, the inside one drives the second.

Standard 2'2' T 32 and 2'2' T 34 tenders were used. Both types held 10 tons of coal.

Variants[edit]

The Class 44 used a lot of steam and correspondingly large amounts of coal. In order to simplify the work and hold its power steady, 32 locomotives were converted to oil-firing by the DB in 1958 and 91 by the DR in 1963. With oil firing, the viscous fuel oil, almost solid when cold, is liquefied by a jet of steam, atomised and then combusted. The job of the stoker consists of starting the burner, greasing and pumping.

The DB's oil-fired locomotives ran under the classification 043 in the new EDP-generated numbering scheme of 1968 until they were retired. These numbers were spare because all DRG Class 43 engines belonged to the DR's fleet. The engines with grate firing were given the designation 044. The DR converted 20 locomotives to Wendler coal dust firing. These proved themselves well on the ramps of the Thuringian Forest with their precise firing. However no more locomotives were converted, as oil-firing was generally favoured because it enabled unrestricted operations.

Oil-fired 043 (044) class enters Rheine from the north, Easter 1974

Following the 1973 oil crisis, all oil-fired engines in the DR were reconverted to coal-firing, because they were indispensable for operations. They were given the old operating numbers that they had had before their modification to oil-firing. In the DB, they were not reconverted because they were soon due for retirement. The last coal-fired Class 44 locomotive with the DB was taken out of service in 1977 at the Gelsenkirchen-Bismarck shed. On its final journey, number 043 903-4 hauled train 81453 (consisting of a breakdown train equipment wagon) from Oldersum to Emden on 26 October 1977 for the Neubauamt Nord. It was the last schedule steam service in the Deutsche Bundesbahn.

Preserved Locomotives[edit]

043 196-5 as a museums loco in Salzbergen

At present there are still two working "44s" in the world. At the 'traditional locomotive shed' at Stassfurt (Traditionsbetriebswerk Staßfurt), stands number 44 1486, the only current representative of her class in Germany. In addition, number 44 1593 remains operational with the Veluwsche Stoomtrein Maatschappij (VSM) in Beekbergen, Netherlands.

The following non-working Class 44s can be visited in various German railway museums:

Monuments include:

  • 043 903 remains preserved as a monument on the railway forecourt in Emden
  • 044 389-5 as a monument in Altenbeken.

Details of other locomotives are given in the list of preserved steam locomotives in Germany.

Trial Locomotives[edit]

Class 44 (medium pressure)
Number(s) DRG 44 011–012
Quantity 2
Year(s) of manufacture 1932–1933
Wheel arrangement 2-10-0
Axle arrangement 1'E h4v
Track gauge 1,435 mm (4 ft 8 12 in)
Length over buffers 22,675 mm (74 ft 4.7 in)
Service weight 114.9 t
Adhesive weight 100.0 t
Axle load 20.2 t
Top speed 80 km/h (50 mph)
Indicated Power 1,868 kW
Driving wheel diameter 1,400 mm (4 ft 7 in)
Leading wheel diameter 1,000 mm (3 ft 3 in)
No. of cylinders 4
Cylinder bore 2×440/700 mm
Piston stroke 660 mm (26 in)
Boiler Overpressure 25 bar
Grate area 4.73 m2 (50.9 sq ft)
Superheater area 113.00 m2 (1,216.3 sq ft)
Evaporative heating area 220.44 m2 (2,372.8 sq ft)

In 1932 and 1933 the firm of Henschel built two trial locomotives designed for a raised boiler overpressure of 25 bar and equipped with four-cylinder compounding, which were also incorporated into Class 44. The two engines, which initially ran under the numbers M 01 1004 and M 01 1005, and later as 44 011 and 44 012, were certainly very powerful, but also high-maintenance. As a result, the initial boiler pressure of 25 bar was quickly reduced to 16 bar.

After the Second World War, number 44 011 went to the Deutsche Bundesbahn and 44 012 to the DR. The DB engine, being a one-off, was retired as early as 1950. Number 44 012 was operated by the FVA Halle as a braking locomotive and not retired until 1962.

In 1975, the repair shop at Brunswick fitted a Riggenbach counter-pressure brake to 44 404. The Bundesbahn Federal Railway Office in Minden used this engine as a braking engine to test new electric locomotives. In 1977 it was retired. It stands today in the Darmstadt-Kranichstein Railway Museum.

See also[edit]

Sources[edit]

  • Sell, Heinrich (2005). Starke Loks für schwere Züge - Die Baureihe 44 bei der DR (in German). Freiburg: Eisenbahn-Bildarchiv, EK-Verlag. ISBN 978-3-88255-356-7. 
  • Konzelmann, Peter (1981). Die Baureihe 44 (in German). Freiburg: EK-Verlag. ISBN 3-88255-144-5. 
  • Weisbrod, Manfred (1994). Die Baureihe 44 (in German). Fürstenfeldbruck: Hermann Merker Verlag. ISBN 3-922404-55-3. 
  • Weisbrod, Manfred; Brozeit, Wolfram (1983). Die Lokomotiven der BR 44 - Ihr Weg durch sechs Jahrzehnte (in German). Düsseldorf: alba-Verlag. ISBN 3-87094-122-7. 

External links[edit]