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The reference for locomotives and railcars

Prussian T 51

German Reichsbahn class 710-1

Germany 1895 329 produced
Die Lokomotive, April 1924

Under the designation T 5, the Prussian State Railways combined tank locomotives for passenger transport, some of which differed significantly from one another, and which had been procured between 1880 and 1905. The wheel arrangements 2-4-2 with fixed and movable carrying axles, 4-4-0, 0-6-0 and 2-6-0 were used. The most numerous sub-variants were the T 51 and T 52, the former of which was built from 1895 for the suburban railways of Berlin.

In order to achieve an increase in performance compared to the older machines used there, another carrying axle was added. To improve the driving characteristics in the sometimes narrow curves, the wheelbase of the two coupled axles was made relatively short and the two running axles were designed as Adams axles, which could be moved sideways and radially.

By 1905, Henschel had manufactured 309 engines for Prussia, and between 1907 and 1921, 20 more almost identical but slightly lighter Hanomag units came to Oldenburg. After the advent of more powerful engines, the T 51 were withdrawn from the Berlin suburban railways and distributed to branch lines in various parts of Prussian territory. Despite the good running qualities in curves, the running smoothness at higher speeds was not sufficient for efficient use on main lines.

As with other locomotives from this period, the already reduced number of T 51 fell sharply between the conception of the Reichsbahn's renumbering plan and the actual renumbering. In 1923, for example, 115 engines were assigned a number in the 710-1 range, but in 1925 only 26 units were renumbered. Five years later the last ones were gone.

The Oldenburg T 51 number 280 “Nadorst” became 71 420 in the Reichsbahn collection Oliver Westerhoff / www.laenderbahn.info

Technical data

General

Built
1895-1905
Manufacturers
Henschel
Wheel arrangement
2-4-2WT (Columbia)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Length
11.69 m
Wheelbase
6.80 m
Empty mass
41.5 t
Service mass
53.1 t
Adhesion mass
31.4 t
Rigid wheelbase
2.00 m
Axle load
15.7 t
Water capacity
5,700 l
Fuel capacity
2 t (coal)

Boiler

Grate area
1.57 m²
Firebox surface
6.6 m²
Tube heating surface
88.4 m²
Evaporative heating surface
95 m²
Total heating surface
95.0 m²

Power plant

Driver diameter
1,600 mm
Boiler pressure
12 bar
Expansion type
simple expansion
Cylinders
two, 430 x 600 mm

Power

Power source
steam
Estimated power
300 kW (408 PS)
Top speed
75 km/h
Starting effort
70.7 kN

Calculated values

Factor of adhesion
1 : 4.36
Optimal speed
26 km/h
Power-to-weight ratio
5.6 kW/t
Heating Surface Equivalent
128.0 m²
Cylinder volume/HSE
1 : 1,361.44
Adhesive weight/Total
1 : 1.69
Tractive force/Heating surface
1 : 15.55
Grate area/Heating surface
1 : 60.51
Firebox/Tube surface
1 : 13.39
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