Imperial-Royal State Railways and Austrian Southern Railway class 170
Austrian Federal Railways class 56, Czechoslovak State Railways class 434.0, Italian State Railway class 729, and Polish State Railways Tr11
Although the class 170 of the kkStB with the 2-8-0 wheel arrangement appeared to be a freight locomotive, it was developed by Gölsdorf for the increasingly heavier passenger trains on the Arlberg Railway. It had two connected steam domes and two compound cylinders. The second and fourth driving axles could be moved laterally for better running characteristics.
Especially during the First World War, the 170 was indispensable in freight transport. It achieved the highest number of all Austrian steam locomotives and the Südbahn also ordered 54. After the war, the ČSD even had more manufactured and now had a total of 374. Of these, 345 were superheated and simpled, which led to the renumbering from class 434.0 to 434.2. The BBÖ had 228, which retained the Reichsbahn's class number 56 after the Second World War.
Technical data
General
| Property | 170.01-09 | 170.10-15 | 170.16-796 |
|---|---|---|---|
| Built | 1897-1921 | ||
| Manufacturers | Wiener Neustadt, StEG, Floridsdorf, BMMF, Breitfeld & Daně, k, Krauss Linz, Škoda | ||
| Wheel arrangement | 2-8-0 (Consolidation) | ||
| Gauge | 1,435 mm (Standard gauge) | ||
Dimensions and weights
| Property | 170.01-09 | 170.10-15 | 170.16-796 |
|---|---|---|---|
| Length | 17.43 m | ||
| Wheelbase | 6.80 m | ||
| Total wheelbase | 13.58 m | ||
| Empty mass | 60.5 t | 61 t | |
| Service mass | 68.5 t | 69 t | |
| Adhesion mass | 57 t | 58 t | |
| Rigid wheelbase | 2.80 m | ||
| Axle load | 14.3 t | 14.5 t | |
| Water capacity | 16,700 l | ||
| Fuel capacity | 7.2 t (coal) | ||
Boiler
| Property | 170.01-09 | 170.10-15 | 170.16-796 |
|---|---|---|---|
| Grate area | 3.36 m² | 3.91 m² | |
| Firebox surface | 14 m² | 14.3 m² | |
| Tube heating surface | 236 m² | ||
| Evaporative heating surface | 250 m² | 250.3 m² | |
| Total heating surface | 250.0 m² | 250.3 m² | |
Power plant
| Property | 170.01-09 | 170.10-15 | 170.16-796 |
|---|---|---|---|
| Driver diameter | 1,258 mm | ||
| Boiler pressure | 12 bar | 13 bar | |
| Expansion type | compound | ||
| Cylinders | two, HP: 540 x 632 mm and LP: 800 x 632 mm | ||
Power
| Property | 170.01-09 | 170.10-15 | 170.16-796 |
|---|---|---|---|
| Power source | steam | ||
| Estimated power | 750 kW (1,020 PS) | 850 kW (1,156 PS) | |
| Top speed | 60 km/h | ||
| Starting effort | 102.7 kN | 111.2 kN | |
| Starting effort simple | 123.2 kN | 133.5 kN | |
Calculated values
| Property | 170.01-09 | 170.10-15 | 170.16-796 |
|---|---|---|---|
| Factor of adhesion | 1 : 5.45 | 1 : 5.03 | 1 : 5.12 |
| Optimal speed | 45 km/h | 47 km/h | |
| Power-to-weight ratio | 10.9 kW/t | 12.4 kW/t | 12.3 kW/t |
| Heating Surface Equivalent | 320.0 m² | 321.8 m² | |
| Cylinder volume/HSE | 1 : 948.69 | 1 : 943.38 | |
| Adhesive weight/Total | 1 : 1.20 | 1 : 1.19 | |
| Tractive force/Heating surface | 1 : 8.58 | 1 : 9.28 | |
| Grate area/Heating surface | 1 : 74.40 | 1 : 64.02 | |
| Firebox/Tube surface | 1 : 16.86 | 1 : 16.50 | |
