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Austrian Federal Railways (BBÖ) class 113
German Reichsbahn class 1 and Yugoslav Railway class 10
Austria | 1923 | 40 produced
Die Lokomotive, January 1927

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 the class 331 and later kept the same numbers on the ÖBB. The last disappeared in 1968. Five locomotives had come to Yugoslavia after World War II, where they were designated as class 10.

General
Built1923-1928
ManufacturerStEG, Floridsdorf
Axle config4-8-0 (Twelve-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length67 ft 10 7/8 in
Wheelbase31 ft 3 9/16 in
Fixed wheelbase12 ft 1 11/16 in
Total wheelbase56 ft 6 13/16 in
Service weight187,834 lbs
Adhesive weight130,954 lbs
Total weight284,396 lbs
Axle load32,739 lbs
Water capacity7,133 us gal
Fuel capacity15,432 lbs (coal)
Power
Power sourcesteam
Estimated power1,743 hp (1,300 kW)
Optimal speed30 mph
Top speed62 mph
Starting effort37,201 lbf
Power Plant
Driver diameter68.5 in
Boiler pressure218 psi
Expansion typesimple
Cylinderstwo, 22 1/16 x 28 3/8 in
Boiler
Grate area48.1 sq ft
Firebox area173.3 sq ft
Tube heating area2,012.8 sq ft
Evaporative heating area2,186.1 sq ft
Superheater area748.1 sq ft
Total heating area2,934.2 sq ft
Calculated Values
steam locomotive
express
last changed: 08/2023
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