Oldenburg G 4.2

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Oldenburg G 4.2 steam locomotives were freight engines built for the Grand Duchy of Oldenburg State Railways between 1895 and 1909. Hanomag produced 27 locomotives, based on the Prussian G 4.2 design.

Key facts
- Configuration: 0-6-0 (six driving wheels)
- Driver diameter: 1,330 mm (52+3/8 in)
- Length: about 15.14 m (49 ft 8 in)
- Weight: axle load around 13.4–13.5 t; service weight about 40.2–41.7 t
- Tender: 3 T 12; fuel 4–5 t coal; water 12 m3
- Boiler pressure: 12 kgf/cm2
- Heating surface: firebox 1.53 m2; evaporative 112.66–117.46 m2
- Cylinders: compound, high-pressure 460 mm, low-pressure 650 mm, stroke 630 mm
- Valve gear: Allan (early), later 15 units with outside Walschaerts gear; some had a Ranafier steam dryer and steam dome
- Maximum speed: 45 km/h
- Use: freight work; could move a 500-ton train at about 30 km/h on a 0.5% incline

DRG renumbering
- Planned takeover by the Deutsche Reichsbahn in 1923 as class 53.10 (numbers 53 1001–1011 and 53 1051–1058)
- In the 1925 renumbering, only eleven locomotives were listed: 53 1001–1003 and 53 1051–1058

Retired: 1927

The Oldenburg G 4.2 locomotives were diesel-free steam freight engines, built in several series, and represented Hanomag’s adaptation of a Prussian design for regional needs.