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Imperial-Royal State Railways class 4
The class 4 was the first express locomotive directly ordered by the kkStB. They had the wheel arrangement 4-4-0 and a driver diameter of 1,820 mm. Based on the class 1 that had been built since 1877 for several railw...
General
| Property | Imperial-Royal State Railways class 4Remove |
|---|---|
| Built | 1885-1897 |
| Manufacturers | Wiener Neustadt, Floridsdorf, Krauss Linz, StEG |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Imperial-Royal State Railways class 4Remove |
|---|---|
| Length loco | 8.87 m |
| Wheelbase | 5.90 m |
| Rigid wheelbase | 2.50 m |
| Empty weight | 39.5 t |
| Service weight | 44.5 t |
| Adhesive weight | 26.5 t |
| Axle load | 13.5 t |
Boiler
| Property | Imperial-Royal State Railways class 4Remove |
|---|---|
| Grate area | 2.06 m² |
| Firebox surface | 7.92 m² |
| Tube heating surface | 119.12 m² |
| Evaporative heating surface | 127.04 m² |
| Total heating surface | 127.0 m² |
Power plant
| Property | Imperial-Royal State Railways class 4Remove |
|---|---|
| Driver diameter | 1,820 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 435 x 632 mm |
Power
| Property | Imperial-Royal State Railways class 4Remove |
|---|---|
| Power source | steam |
| Estimated power | 400 kW (544 PS) |
| Top speed | 80 km/h |
| Starting effort | 61.4 kN |
Calculated values
| Property | Imperial-Royal State Railways class 4Remove |
|---|---|
| Factor of adhesion | 1 : 4.23 |
| Optimal speed | 40 km/h |
| Power-to-weight ratio | 9.0 kW/t |
| Heating Surface Equivalent | 166.6 m² |
| Cylinder volume/HSE | 1 : 1,127.29 |
| Adhesive weight/Total | 1 : 1.68 |
| Tractive force/Heating surface | 1 : 10.10 |
| Grate area/Heating surface | 1 : 61.67 |
| Firebox/Tube surface | 1 : 15.04 |
