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Army Field Railway Brigadelokomotive

German Reichsbahn class 99331, Polish State Railways Tx1 and Tx2, Hungarian State Railways class 498, and Lithuanian series K4

Germany 1903 2573 produced
Brigadelokomotive built by Hartmann in Chemnitz on a postcard Brück & Sohn Kunstverlag Meißen CC0

The Brigadelokomotive was a 0-8-0T tank locomotive built for the German military field railways with a gauge of 600 mm (nearly two feet). It was designed at the beginning of the 20th century when it became evident that the 0-6-0+0-6-0T “Zwilling” was not powerful enough anymore. The first prototype was completed by Henschel in 1903, followed by a low volume production starting in 1905.

The locomotives had outside frames, outside cylinders and outside Stephenson valve gear. To enable running through tight curves, the first and last axles were Klien-Lindner hollow axles which could be adjusted radially. Later these were exchanged on some locomotives for conventional axles with weakened wheel flanges. With an indicated power of 75 hp, they could haul 70 tonnes with 15 km/h. Due to the limited water capacity of 1,100 liters, additional tenders were built with a capacity of up to 5,000 liters of water and 1.2 tonnes of coal.

Large-scale production only started in World War I, but at a large number of manufacturers. When production was completed in 1919, more than 2,500 had been built. With 789, the largest number had come from Henschel. Second and third were Borsig with 377 and O&K with 359. After the end of the war, they came to a large number of civil operators in many countries. Today, around 100 are still existing all around the world.

Technical data

General

Built
1903-1919
Manufacturers
BMAG, Borsig, Esslingen, Hanomag, Hartmann, Henschel, Hohenzollern, Humboldt, Jung, Krauss, Linke-Hofmann, Maffei, O&K, SACM, Vulcan
Wheel arrangement
0-8-0T (Eight-coupled)
Gauge
600 mm (600 mm)

Dimensions and weights

Length
5.98 m
Wheelbase
2.26 m
Empty mass
9.7 t
Service mass
12 t
Adhesion mass
12 t
Rigid wheelbase
0.79 m
Axle load
3 t
Water capacity
1,100 l
Fuel capacity
0.3 t (coal)

Boiler

Grate area
0.42 m²
Firebox surface
1.5 m²
Tube heating surface
14.9 m²
Evaporative heating surface
16.4 m²
Total heating surface
16.4 m²

Power plant

Driver diameter
600 mm
Boiler pressure
15 bar
Expansion type
simple expansion
Cylinders
two, 240 x 240 mm

Power

Power source
steam
Indicated power
55 kW (75 PS)
Top speed
25 km/h
Starting effort
29.4 kN

Calculated values

Factor of adhesion
1 : 4.01
Optimal speed
11 km/h
Power-to-weight ratio
4.6 kW/t
Heating Surface Equivalent
23.9 m²
Cylinder volume/HSE
1 : 908.56
Adhesive weight/Total
1 : 1.00
Tractive force/Heating surface
1 : 37.41
Grate area/Heating surface
1 : 39.05
Firebox/Tube surface
1 : 9.93

Topics

  • steam locomotive
  • narrow gauge
  • tank locomotive
  • field railway
  • military railway
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Last changed: 01/2025

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