Austrian Federal Railways (BBÖ) class 478
Austrian Federal Railways class 392 and German Reichsbahn class 9225
The class 478 was a heavy shunter introduced in 1926 to replace old tender locomotives which had previously been used for shunting. It was based on the class 378 which had the wheel arrangement 2-8-2T, but did not have the carrying axles, what resulted in the wheel arrangement 0-8-0T. For a higher tractive effort, the diameter of the cylinders had been increased from 450 to 530 mm.
In 1926 and 1927, 50 were built by three manufacturers. In World War II, they were numbered 92 2501 to 2550 by the Reichsbahn. After the war, the ÖBB made them class 392. After the last one was retired in 1972, only 392.2510 and 392.2530 are still existing and owned by the ÖGEG, with 2530 still in working order.
Technical data
General
- Built
- 1926-1927
- Manufacturers
- Floridsdorf, Wiener Neustadt, StEG
- Wheel arrangement
- 0-8-0T (Eight-coupled)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 11.17 m
- Wheelbase
- 4.20 m
- Service mass
- 64 t
- Adhesion mass
- 64 t
- Rigid wheelbase
- 4.20 m
- Axle load
- 16 t
- Water capacity
- 10,000 l
- Fuel capacity
- 2.5 t (coal)
Boiler
- Grate area
- 2 m²
- Firebox surface
- 9.7 m²
- Tube heating surface
- 101.1 m²
- Evaporative heating surface
- 110.8 m²
- Superheater surface
- 30.25 m²
- Total heating surface
- 141.1 m²
Power plant
- Driver diameter
- 1,140 mm
- Boiler pressure
- 14 bar
- Expansion type
- simple expansion
- Cylinders
- two, 530 x 570 mm
Power
- Power source
- steam
- Estimated power
- 675 kW (918 PS)
- Top speed
- 40 km/h
- Starting effort
- 167.1 kN
Calculated values
- Factor of adhesion
- 1 : 3.76
- Optimal speed
- 24 km/h
- Power-to-weight ratio
- 10.5 kW/t
- Heating Surface Equivalent
- 219.8 m²
- Cylinder volume/HSE
- 1 : 1,144.24
- Adhesive weight/Total
- 1 : 1.00
- Tractive force/Heating surface
- 1 : 24.75
- Grate area/Heating surface
- 1 : 70.53
- Firebox/Tube surface
- 1 : 10.42
- Total/Superheater
- 1 : 3.66
