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
Gauge:	1,435 mm
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.

See also

• Grand Duchy of Oldenburg State Railways
• List of Oldenburg locomotives and railbuses
• Länderbahnen

Literature

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

External links

• There is a relevant English-language forum at Railways of Germany