Oldenburg P 4.2

Oldenburg P 4.2
DRG Class 36.12
Locomotive Neptun
Number(s) DRG 36 1251 - 1258
Quantity 8
Manufacturer Hanomag
Year(s) of manufacture 1907 - 1909
Retired 1929
Wheel arrangement 4-4-0
Axle arrangement 2'B n2v
Track gauge 1,435 mm (4 ft 8 1⁄2 in)
Length over buffers 17,461 mm (57 ft 3 in)
Service weight 52.2 t
Adhesive weight 30.2 t
Axle load 15.1 t
Top speed 90 km/h (56 mph)
Indicated Power 427 kW
Driving wheel diameter 1,750 mm (69 in)
Leading wheel diameter 1,000 mm (39 in)
No. of cylinders 2
Cylinder bore 460 mm (18 in)/680 mm (27 in)
Piston stroke 600 mm (24 in)
Grate area 2.27 m2
Evaporative heating area 119.35 m2
Tender pr 3 T 12 and 2'2' T 20
Water capacity 16.0 m3

The Oldenburg Class P 4.2 steam locomotives were German engines built for the Grand Duchy of Oldenburg State Railways (Großherzoglich Oldenburgische Staatseisenbahnen) between 1907 and 1909. They were based on the standard variant of the Prussian P 4.2, but there were a number of small differences such as a Ranafier steam dryer and, on three examples, a Lentz valve gear, a system widely used in Oldenburg. Production began in 1907 and eight engines were procured up to 1909.

The engines taken over by the Deutsche Reichsbahn were grouped as DRG Class 36.12 given numbers 36 1251 to 36 1258.

The locomotives used tenders of the 3 T 12 or 2'2' T 20 classes.

See also

Sources

    • Spielhoff, Lothar (1990). Länderbahn-Dampf-Lokomotiven. Band 1: Preußen, Mecklenburg, Oldenburg, Sachsen und Elsaß-Lothringen (in German). Stuttgart: Franckh'sche Verlagshandlung. ISBN 3-440-06145-0.
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