Oldenburg S 3

The Oldenburg Class S 3 steam locomotive was a German engine built for the Grand Duchy of Oldenburg State Railways (Großherzoglich Oldenburgische Staatseisenbahnen) in 1903 and 1904. It was based on a Prussian prototype, the Prussian S 3 (see photo), and procured for the route between Wilhelmshaven, Oldenburg and Bremen. It was the first express train engine built for the Oldenburg state railways and also the first one fitted with a steam dome. It replaced the old P 4 passenger train locomotives.

Oldenburg S 3 DRG Class 13.18
Prussian S3 photographed in 1895 at Berlin-Charlottenburg
Number(s)	GOE: 151–154, 160, 161 DRG: 13 1801–1806
Quantity	6
Manufacturer	Hanomag
Year(s) of manufacture	1903–1904
Retired	1927
Wheel arrangement	4-4-0
Axle arrangement	2′B n2v
Type	Express train locomotive
Length over buffers	17,461 mm (57 ft 3 1⁄2 in)
Service weight	52.2 t (51.4 long tons; 57.5 short tons)
Adhesive weight	30.2 t (29.7 long tons; 33.3 short tons)
Axle load	15.0 t (14.8 long tons; 16.5 short tons)
Top speed	95 km/h (59 mph)
Driving wheel diameter	1,980 mm (78 in)
Leading wheel diameter	1,000 mm (39 3⁄8 in)
No. of cylinders	Two, compound
LP cylinder bore	680 mm (26 3⁄4 in)
HP cylinder bore	460 mm (18 1⁄8 in)
Piston stroke	630 mm (24 13⁄16 in)
Boiler Overpressure	12 kgf/cm2 (1,180 kPa; 171 lbf/in2)
Grate area	2.27 m2 (24.4 sq ft)
Evaporative heating area	119.4 m2 (1,285 sq ft)

Six engines were built by Hanomag in 1903 and 1904 with numbers 151–154, 160 and 161. They differed in several technical details from their Prussian counterparts, but did not have Lentz valve gear which, later, became common throughout Oldenburg.

The Deutsche Reichsbahn took over all six locomotives and grouped them into DRG Class 13.18, allocating them the numbers 13 1801 to 13 1806. They were retired by 1927.