Tyrolean State Railway “Achensee” to “Tirol”
Austrian Southern Railway class 18 (old) or 25
The Tyrolean State Railway built two lines, the northern one running between Innsbruck and Kufstein on the Bavarian border. Among the 26 locomotives purchased were eight Engerth-type supporting tender locomotives, which were intended for operation with freight trains. Their chassis consisted of three driving axles with a wheel diameter of 1,264 mm and a two-axle tender.
Five of the eight machines were given the names of places along the line. These were “Amras”, “Hall”, “Innsbruck”, “Kufstein” and “Martinswand”. The remaining three were called “Achensee”, “Inn” and “Tirol”. As early as 1859, just a year after the line opened, the Tyrolean State Railway was taken over by the Southern Railway. These locomotives were first renumbered to class 18 and later class 25.
Technical data
General
- Built
- 1856
- Manufacturers
- Maffei
- Wheel arrangement
- 0-6-4-T (Engerth)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Empty mass
- 40.1 t
- Adhesion mass
- 34.6 t
- Axle load
- 11.4 t
Boiler
- Grate area
- 1.6 m²
- Evaporative heating surface
- 148.2 m²
- Total heating surface
- 148.2 m²
Power plant
- Driver diameter
- 1,264 mm
- Boiler pressure
- 7 bar
- Expansion type
- simple expansion
- Cylinders
- two, 461 x 632 mm
Power
- Power source
- steam
- Estimated power
- 245 kW (333 PS)
- Starting effort
- 63.2 kN
Calculated values
- Factor of adhesion
- 1 : 5.37
- Optimal speed
- 24 km/h
- Tractive force/Heating surface
- 1 : 8.91
- Grate area/Heating surface
- 1 : 92.63
