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Austrian Federal Railways (BBÖ) class 81
In order to be able to operate coal trains weighing up to 1,600 tonnes from the Moravian-Silesian coal fields, a more powerful freight locomotive was needed. Although Gölsdorf had already developed a ten-coupled freig...
General
| Property | Austrian Federal Railways (BBÖ) class 81Remove |
|---|---|
| Built | 1920-1923 |
| Manufacturers | Wiener Neustadt, Floridsdorf, StEG, Krauss Linz |
| Wheel arrangement | 2-10-0 (Decapod) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Austrian Federal Railways (BBÖ) class 81Remove |
|---|---|
| Length | 18.08 m |
| Wheelbase | 8.50 m |
| Rigid wheelbase | 4.50 m |
| Total wheelbase | 14.88 m |
| Empty weight | 72 t |
| Service weight | 81 t |
| Adhesive weight | 71 t |
| Axle load | 14.2 t |
| Total weight | 121 t |
| Water capacity | 16,000 l |
| Fuel capacity | 7.5 t (coal) |
Boiler
| Property | Austrian Federal Railways (BBÖ) class 81Remove |
|---|---|
| Grate area | 4.46 m² |
| Firebox surface | 15.5 m² |
| Tube heating surface | 193.2 m² |
| Evaporative heating surface | 208.7 m² |
| Superheater surface | 50.2 m² |
| Total heating surface | 258.9 m² |
Power plant
| Property | Austrian Federal Railways (BBÖ) class 81Remove |
|---|---|
| Driver diameter | 1,298 mm |
| Boiler pressure | 15 bar |
| Expansion type | simple expansion |
| Cylinders | two, 590 x 632 mm |
Power
| Property | Austrian Federal Railways (BBÖ) class 81Remove |
|---|---|
| Power source | steam |
| Indicated power | 1,130 kW (1,536 PS) |
| Top speed | 55 km/h |
| Starting effort | 216.1 kN |
Calculated values
| Property | Austrian Federal Railways (BBÖ) class 81Remove |
|---|---|
| Factor of adhesion | 1 : 3.22 |
| Optimal speed | 32 km/h |
| Power-to-weight ratio | 14.0 kW/t |
| Heating Surface Equivalent | 386.6 m² |
| Cylinder volume/HSE | 1 : 893.88 |
| Adhesive weight/Total | 1 : 1.14 |
| Tractive force/Heating surface | 1 : 17.43 |
| Grate area/Heating surface | 1 : 58.05 |
| Firebox/Tube surface | 1 : 12.46 |
| Total/Superheater | 1 : 4.16 |
