Austrian Southern Railway class 480
German Reichsbahn class 576 and Austrian Federal Railways class 257
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