The reference for locomotives and railcars
Fireless Steam Locomotives[Inhalt]
Saxon I F
Germany | 1917 | only one produced
I F of the sleeper impregnation plant in Wülknitz
I F of the sleeper impregnation plant in Wülknitz
Die Lokomotive, June 1939

Fireless steam locomotives, are used to this day primarily in industrial plants where there is an increased risk of fire and/or where larger amounts of steam are produced during operations. Although most of the operators of these machines were private companies, the Saxon State Railways also needed a shunting locomotive for their sleeper impregnation plant in Wülknitz, where both of these conditions were met. One of these machines was ordered from the Sächsische Maschinenfabrik in Chemnitz in 1917 and classified as type I F. In the previous three years, four identical locomotives had already been manufactured there for various industrial companies.

The principle of fireless locomotives is that hot steam is introduced into the boiler, which heats up the water already in it and gradually causes it to evaporate as well. With increasing operating time, the pressure in the boiler decreases, which also lowers the boiling point of the water, so that new steam can continue to be generated even after several hours of operation. Otherwise, the design of the running gear and engine is the same as that of a conventional steam locomotive. However, since the weight of the firebox was eliminated, the cylinders were usually placed at the rear under the cab for better balance.

The locomotive for the sleeper impregnation plant was put into service in 1917 and given the number 1 because it was the only locomotive of this type on the state railway. It remained in action in this plant all of its life, which was later referred to as the Wülknitz track structure plant. They were phased out around 1970, although large series of new steam storage locomotives were still being produced in the GDR even in the 1980s.

Axle config0-4-0T (Four-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Empty weight35,274 lbs
Service weight46,297 lbs
Adhesive weight46,297 lbs
Axle load23,149 lbs
Power sourcefireless steam
Top speed19 mph
Power Plant
Driver diameter33.9 in
Boiler pressure174 psi
Cylinderstwo, 16 15/16 x 15 3/4 in
Calculated Values
steam locomotive
fireless locomotive
tank locomotive
last changed: 01/2022

We use cookies to save the following settings:

  • selected navigation structure
  • selected language
  • preferred units
  • spelling of railway company names

If you refuse the use of cookies, the settings will only be retained for the current session and will be reset to the default values the next time you visit the site.

Display of units

Here you can set the desired unit system for the technical data.

  • Metric: Lengths in meters, weights in tonnes, and volumes in cubic meters
  • Imperial (UK): Lengths in feet/inches, weights in long tons and volumes in imperial gallons
  • Imperial (US): Lengths in feet/inches, weights in pounds, and volumes in US gallons
  • Individual: Depends on the country of origin of each locomotive
Operator names

Here you can set the display of railway company names.

  • Short: Abbreviation or short form of the name
  • Standard: commonly used name, partially translated to English
  • Complete: full name in local language