The reference for locomotives and railcars
Imperial-Royal State Railways class 100
Austria-Hungary | 1911 | only one produced
100.01 on a works photo
100.01 on a works photo

When the class 380 with a 2-10-0 wheel arrangement could no longer cope with the increased weight of the express trains on the Tauern Railway, Gölsdorf had to develop an even more powerful mountain express locomotive. Since the maximum axle load was still limited to 13.8 tonnes, a total of six axles was no longer sufficient. Based on his previous experience with laterally adjustable coupled axles, he dared to develop a twelve-coupled locomotive for the winding mountain route for the first time.

In order to be able to negotiate curves with a radius of 150 meters, the leading axle could be radially adjusted by 50 mm and three of the driving axles could be shifted laterally. The freedom of movement of the second and fifth coupled axle was 26 mm and that of the sixth 40 mm. The third, which was the driving axle, had no wheel flanges. To prevent the coupling rods from jamming in curves, these were connected to the crank pins on the last two axles with cardan joints.

The boiler tapers towards the front and was the largest that had been installed on an Austrian locomotive to date. With the oil firing, this generated an output of 2,020 hp. Express trains weighing 360 tonnes could be pulled at 40 km/h on the Tauern Railway's incline of 2.8 percent. In order to comply with the axle loads, the lightweight construction of the locomotive was taken to the extreme in many places, which later led to problems with durability.

Sectional drawing with dimensions
Sectional drawing with dimensions
Die Lokomotive, November 1911

Although the chassis showed good running characteristics on test runs at up to 92 km/h, it was only approved for 60 km/h. However, it remained with a single locomotive, which was taken over by the BBÖ after the First World War and was not built again due to the plans for electrification. It was retired in 1928 after a rupture in one of the inner cylinders. In Württemberg, the otherwise good experience with the locomotive was used as an opportunity to develop the K with the same wheel arrangement.

Axle config2-12-0 (Centipede) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length63 ft 4 9/16 in
Length loco43 ft 3 5/16 in
Wheelbase33 ft 1 5/8 in
Fixed wheelbase15 ft 0 11/16 in
Total wheelbase52 ft 3 3/16 in
Empty weight194,580 lbs
Service weight211,136 lbs
Adhesive weight181,154 lbs
Axle load30,556 lbs
Water capacity4,887 us gal
Fuel capacity1,189 us gal (oil)
Power sourcesteam
Indicated power1,991 hp (1,485 kW)
Optimal speed29 mph
Top speed37 mph
Starting effort44,225 lbf
with start valve53,070 lbf
Power Plant
Driver diameter55.5 in
Boiler pressure232 psi
Expansion typecompound
Cylindersfour, HP: 17 11/16 x 26 3/4 in
and LP: 29 15/16 x 26 3/4 in
Grate area53.8 sq ft
Firebox area187.3 sq ft
Tube heating area2,492.9 sq ft
Evaporative heating area2,680.2 sq ft
Superheater area505.9 sq ft
Total heating area3,186.1 sq ft
Calculated Values
steam locomotive
Von Borries compound
Karl Gölsdorf
last changed: 06/2023

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