Austrian Federal Railways (BBÖ) class 113
German Reichsbahn class 331 and Yugoslav Railway class 10
From 1923, the BBÖ had 40 locomotives with a 4-8-0 wheel arrangement and a low axle load built to operate the heavier express trains on the Westbahn. Borrowings were taken from the two prototypes of the class 570, which had been built in 1915 for the Südbahn. Despite the lack of a trailing axle and the maximum speed of only 85 km/h, they had a large grate and a high tractive effort, which allowed them to be used with heavy trains, even in mountainous areas. The Polish PKP had Fablok build 60 very similar locomotives as Os24. The Austrian locomotives came to the Reichsbahn in 1938 as class 331 and later kept the same numbers in the ÖBB. The last disappeared in 1968. Five locomotives had come to Yugoslavia after World War II, where they were designated as class 10.
Technical data
General
- Built
- 1923-1928
- Manufacturers
- StEG, Floridsdorf
- Wheel arrangement
- 4-8-0 (Twelve-wheeler)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 20.70 m
- Wheelbase
- 9.54 m
- Total wheelbase
- 17.24 m
- Service mass
- 85.2 t
- Adhesion mass
- 59.4 t
- Total mass
- 129 t
- Rigid wheelbase
- 3.70 m
- Axle load
- 14.9 t
- Water capacity
- 27,000 l
- Fuel capacity
- 7 t (coal)
Boiler
- Grate area
- 4.47 m²
- Firebox surface
- 16.1 m²
- Tube heating surface
- 187 m²
- Evaporative heating surface
- 203.1 m²
- Superheater surface
- 69.5 m²
- Total heating surface
- 272.6 m²
Power plant
- Driver diameter
- 1,740 mm
- Boiler pressure
- 15 bar
- Expansion type
- simple expansion
- Cylinders
- two, 560 x 720 mm
Power
- Power source
- steam
- Estimated power
- 1,300 kW (1,768 PS)
- Top speed
- 100 km/h
- Starting effort
- 165.5 kN
Calculated values
- Factor of adhesion
- 1 : 3.52
- Optimal speed
- 48 km/h
- Power-to-weight ratio
- 15.3 kW/t
- Heating Surface Equivalent
- 422.6 m²
- Cylinder volume/HSE
- 1 : 839.26
- Adhesive weight/Total
- 1 : 1.43
- Tractive force/Heating surface
- 1 : 12.68
- Grate area/Heating surface
- 1 : 60.98
- Firebox/Tube surface
- 1 : 11.61
- Total/Superheater
- 1 : 2.92