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Imperial-Royal State Railways class 73
After the four class 76 freight locomotives had been put into service on the Arlberg in 1884, the class 73 shown here was introduced only one year later. The new locomotive was also a 0-8-0, but had smaller cylinders ...
| Imperial-Royal State Railways class 73Remove | |
|---|---|
| Variant | increased boiler pressure |
| Built | 1885-1909 |
| Manufacturers | Wiener Neustadt;Floridsdorf;Krauss Linz;StEG;ČKD |
| Wheel arrangement | D |
| Gauge | 1435 mm |
| Length | 16477 mm |
| Service mass | 55100 kg |
| Top speed | 35 km/h |
| Power | |
| Engine |
General
| Property | Imperial-Royal State Railways class 73increased boiler pressure |
|---|---|
| Built | 1885-1909 |
| Manufacturers | Wiener Neustadt, Floridsdorf, Krauss Linz, StEG, Č, KD |
| Wheel arrangement | 0-8-0 (Eight-coupled) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Imperial-Royal State Railways class 73increased boiler pressure |
|---|---|
| Length | 16.48 m |
| Wheelbase | 3.90 m |
| Total wheelbase | 11.64 m |
| Empty mass | 47.5 t |
| Service mass | 55.1 t |
| Adhesion mass | 55.1 t |
| Rigid wheelbase | 2.55 m |
| Water capacity | 12,000 l |
| Fuel capacity | 7.2 t (coal) |
Boiler
| Property | Imperial-Royal State Railways class 73increased boiler pressure |
|---|---|
| Grate area | 2.25 m² |
| Firebox surface | 11.21 m² |
| Tube heating surface | 170.8 m² |
| Evaporative heating surface | 182 m² |
| Total heating surface | 182.0 m² |
Power plant
| Property | Imperial-Royal State Railways class 73increased boiler pressure |
|---|---|
| Driver diameter | 1,100 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 500 x 570 mm |
Power
| Property | Imperial-Royal State Railways class 73increased boiler pressure |
|---|---|
| Power source | steam |
| Estimated power | 550 kW (748 PS) |
| Top speed | 35 km/h |
| Starting effort | 121.1 kN |
Calculated values
| Property | Imperial-Royal State Railways class 73increased boiler pressure |
|---|---|
| Factor of adhesion | 1 : 4.46 |
| Optimal speed | 27 km/h |
| Power-to-weight ratio | 10.0 kW/t |
| Heating Surface Equivalent | 238.1 m² |
| Cylinder volume/HSE | 1 : 940.26 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 13.90 |
| Grate area/Heating surface | 1 : 80.89 |
| Firebox/Tube surface | 1 : 15.24 |
