The reference for locomotives and railcars
Germany | 1885 | 4 produced
Works photo of the “Mülsen”
Works photo of the “Mülsen”

The Saxon State Railways had a total of four small tank locomotives of the type VII TO built by Hartmann in 1885 and 1887 for operation on less frequented branch lines. Although they were standard gauge, they only had two axles and a small boiler. To save personnel costs, they could be operated by one person.

Originally they had two cylinders with a diameter of 270 millimeters. From 1890, the left cylinder was enlarged to 415 millimeters and the locomotives became compound machines of the type VII TOV. In 1920, two of the four were connected at the rear walls, resulting in a double locomotive similar to the “Zwillinge” of the Heeresfeldbahn. Both these and the other two were retired by 1923.

Built1885, 1887
Axle config0-4-0T (Four-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length22 ft 1 1/2 in
Service weight42,329 lbs
Adhesive weight42,329 lbs
Axle load21,164 lbs
Fuel capacitycoal
Power sourcesteam
Estimated power80 hp (60 kW)
Optimal speed13 mph
Top speed28 mph
Starting effort3,819 lbf
with start valve4,583 lbf
Power Plant
Driver diameter48.4 in
Boiler pressure174 psi
Expansion typecompound
Cylinderstwo, HP: 10 5/8 x 15 3/4 in
and LP: 16 5/16 x 15 3/4 in
Grate area4.3 sq ft
Evaporative heating area285.2 sq ft
Total heating area285.2 sq ft
Calculated Values
steam locomotive
omnibus locomotive
tank locomotive
secondary line
last changed: 12/2023

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