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The reference for locomotives and railcars

Austrian Southern Railway class 480

German Reichsbahn class 576 and Austrian Federal Railways class 257

Austria 1921 6 produced
257 601 in April 1999 in Strasshof Herbert Ortner CC BY 4.0

The Südbahn class 480 was a 0-10-0 freight locomotive that was based on the classes 180 and 80. While the former ones had been limited to a lower axle load, the 480 could utilize the network's maximum of 14.5 tonnes, allowing for a bigger boiler. Only six were built and the last three were directly delivered to the BBÖ due to the financial problems of the Südbahn.

Their main task was helper service on the Semmering. In 1938, they received the numbers 57 601 to 57 606. After the war, the ÖBB made them class 257. In 1957, three were equipped with Giesl ejectors. Three years earlier, the first one had already been retired and the last one was retired in 1966. Today, 257 601 is still existing in an non-operational state and unfortunately, 257 605 has been scrapped in 2006.

Technical data

General

Built
1921
Manufacturers
StEG
Wheel arrangement
0-10-0 (Ten-coupled)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Length loco
11.14 m
Wheelbase
5.60 m
Empty mass
64.3 t
Service mass
71.5 t
Adhesion mass
71.5 t
Rigid wheelbase
2.80 m
Axle load
14.3 t
Water capacity
17,000 l
Fuel capacity
6.6 t (coal)

Boiler

Grate area
3.7 m²
Firebox surface
12.7 m²
Tube heating surface
181.2 m²
Evaporative heating surface
193.9 m²
Superheater surface
45.5 m²
Total heating surface
239.4 m²

Power plant

Driver diameter
1,298 mm
Boiler pressure
14 bar
Expansion type
simple expansion
Cylinders
two, 610 x 632 mm

Power

Power source
steam
Indicated power
975 kW (1,326 PS)
Top speed
50 km/h
Starting effort
215.6 kN

Calculated values

Factor of adhesion
1 : 3.25
Optimal speed
27 km/h
Power-to-weight ratio
13.6 kW/t
Heating Surface Equivalent
348.4 m²
Cylinder volume/HSE
1 : 1,060.27
Adhesive weight/Total
1 : 1.00
Tractive force/Heating surface
1 : 18.81
Grate area/Heating surface
1 : 64.70
Firebox/Tube surface
1 : 14.27
Total/Superheater
1 : 4.26
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