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The reference for locomotives and railcars

Prussian T 8

German Reichsbahn class 8910

Germany 1906 100 produced
Die Lokomotive, April 1924

The T 8 was developed because the six-coupled T 3 and T 7 tank locomotives used at the beginning of the century had become too slow for line use with a top speed of 45 km/h. It was slightly heavier than the T 7, was superheated and was designed for 60 km/h. Due to the fact that it had no carrying axles and therefore larger overhanging masses, the running characteristics were still not satisfactory at higher speeds. Even increasing the wheelbase did not produce the desired results, which contradicted the actual reason for purchasing the T 8.

A total of 100 locomotives were delivered by three manufacturers, 78 of which were taken over by the Reichsbahn in 1925 as numbers 89 001 to 89 078. There, however, they were soon only used in shunting service and were soon sold to private railways, including the Bayerische Lokalbahn AG. The locomotives from the latter came back to the Reichsbahn after nationalization in 1938 and were numbered 89 1001 and 89 1002, since the class number 89 had meanwhile been assigned to a standard locomotive. Two more from Mecklenburg were given the numbers 1003 and 1004, but all were retired shortly afterwards. After the war, the Reichsbahn of the GDR only took over two examples as 89 6476 and 89 6576, which had previously been owned by private railways. They were in use until 1964, a third example was a works locomotive on the Bundesbahn stock and was used until 1965.

Former number 7001 in May 1993 in Potsdam MPW57 / PD

Technical data

General

Built
1906-1909
Manufacturers
Linke-Hofmann, O&K, Hanomag
Wheel arrangement
0-6-0T (Six-coupled)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Length
9.46 m
Wheelbase
3.40 m
Empty mass
35.8 t
Service mass
45.7 t
Adhesion mass
45.7 t
Rigid wheelbase
3.40 m
Axle load
15.5 t
Water capacity
5,000 l
Fuel capacity
1.4 t (coal)

Boiler

Grate area
1.48 m²
Firebox surface
7.5 m²
Tube heating surface
60.93 m²
Evaporative heating surface
68.43 m²
Superheater surface
16.4 m²
Total heating surface
84.8 m²

Power plant

Driver diameter
1,350 mm
Boiler pressure
12 bar
Expansion type
simple expansion
Cylinders
two, 500 x 600 mm

Power

Power source
steam
Estimated power
350 kW (476 PS)
Top speed
60 km/h
Starting effort
113.3 kN

Calculated values

Factor of adhesion
1 : 3.96
Optimal speed
19 km/h
Power-to-weight ratio
7.7 kW/t
Heating Surface Equivalent
138.7 m²
Cylinder volume/HSE
1 : 1,698.40
Adhesive weight/Total
1 : 1.00
Tractive force/Heating surface
1 : 27.90
Grate area/Heating surface
1 : 57.32
Firebox/Tube surface
1 : 8.12
Total/Superheater
1 : 4.17
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