The reference for locomotives and railcars
Imperial-Royal State Railways class 129
Austria | 1902 | 17 produced
Die Lokomotive, January 1904

For commuter service, Gölsdorf developed the class 129 tank locomotive with a 2-6-0T wheel arrangement and a two-cylinder compound engine with a long stroke. This was the first time that this wheel arrangement was used for passenger trains in Austria. They could easily run at 110 km/h on test runs and delivered up to 1,150 hp. They formed the basis for the class 229 of the Südbahn, which had larger stocks thanks to an additional trailing axle. The kkStB then ordered further locomotives of the class 229 and also converted their locomotives of the class 129 in the same way.

ManufacturerWiener Neustadt, Floridsdorf
Axle config2-6-0T (Mogul) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length33 ft 7 3/4 in
Wheelbase21 ft 1 15/16 in
Fixed wheelbase13 ft 1 1/2 in
Empty weight97,665 lbs
Service weight126,766 lbs
Adhesive weight94,799 lbs
Axle load32,408 lbs
Water capacity1,823 us gal
Fuel capacity5,512 lbs (coal)
Power sourcesteam
Estimated power637 hp (475 kW)
Optimal speed27 mph
Top speed50 mph
Starting effort14,854 lbf
with start valve17,825 lbf
Power Plant
Driver diameter63.5 in
Boiler pressure203 psi
Expansion typecompound
Cylinderstwo, HP: 16 9/16 x 28 3/8 in
and LP: 25 9/16 x 28 3/8 in
Grate area21.5 sq ft
Firebox area101.2 sq ft
Tube heating area1,040.9 sq ft
Evaporative heating area1,142.1 sq ft
Total heating area1,142.1 sq ft
Calculated Values
steam locomotive
tank locomotive
Karl Gölsdorf
last changed: 07/2023

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