Oldenburg T 5.1

Oldenburg T 5.1
DRG Class 71.4
Number(s) DRG 71 401–420
Quantity 20
Manufacturer Hanomag
Year(s) of manufacture 1907–1921
Retired 1930
Wheel arrangement 2-4-2T
Axle arrangement 1'B1' n2t
Track gauge 1,435 mm (4 ft 8 1⁄2 in)
Length over buffers 11,685 mm
Overall wheelbase 6,800/7,000* mm
Empty weight 41.50 t
Service weight 53.10 t
Adhesive weight 30.00 t
Axle load 15.0 t
Top speed 75 km/h
Driving wheel diameter 1,600 mm
Leading wheel diameter 1,000 mm
Trailing wheel diameter 1,000 mm
No. of cylinders 2
Cylinder bore 430 mm
Piston stroke 600
Boiler Overpressure 12 bar
Grate area 156 m2
Evaporative heating area 100.68 m2
* from 1911

The Oldenburg Class T 5.1 was a German steam locomotive built for the Grand Duchy of Oldenburg State Railways as a tank engine for passenger train duties. Its design was based on that of the Prussian T 5.1.

The firm of Hanomag manufactured 20 units of the Oldenburg T 5.1 between 1907 and 1921. Like its Prussian sisters it had the defect of poor riding qualities at high speeds. As a result, during the delivery of these engines design changes were made to the running gear, for example the overall wheelbase was increased. But even these measures met with no success.

The Deutsche Reichsbahn took over all 20 locomotives in 1925 as DRG Class 71.4 and gave them numbers 71 401 to 71 420. They were retired by 1930.

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Literature

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