Emperor Ferdinand Northern Railway IId
Imperial-Royal State Railways class 308, Czechoslovak State Railways class 274.0, and Polish State Railways Pf12
Austria-Hungary 1895 75 produced
The 57 series IId locomotives of the Kaiser Ferdinands-Nordbahn were the first Atlantic locomotives in Europe. The trailing axle was fixed in the frame, but was only just behind the second driving axle. In the kkStB they became the class 308 and the twelve in 1908 with steam dryers became the 308.5. Three units were rebuilt to class 227 with a 4-6-0 wheel arrangement. The Warsaw-Vienna Railway received 18 locomotives that were almost identical. After World War I almost half ended up in either Czechoslovakia or Poland. Regardless of the operator, the locomotives had almost completely disappeared around 1940.
Technical data
General
| Property | 225-236 | 237-251 | 252-269 | 270-281 |
|---|---|---|---|---|
| Built | 1895 | 1895-1899 | 1900-1901, 1905-1907 | 1908 |
| Manufacturers | Wiener Neustadt | |||
| Wheel arrangement | 4-4-2 (Atlantic) | |||
| Gauge | 1,435 mm (Standard gauge) | |||
Dimensions and weights
| Property | 225-236 | 237-251 | 252-269 | 270-281 |
|---|---|---|---|---|
| Length | 17.00 m | |||
| Wheelbase | 8.35 m | |||
| Total wheelbase | 13.90 m | |||
| Empty mass | 54.7 t | 55 t | ||
| Service mass | 60.6 t | 60.9 t | ||
| Adhesion mass | 28 t | |||
| Total mass | 97.7 t | 98.2 t | ||
| Rigid wheelbase | 2.30 m | |||
| Axle load | 14 t | |||
| Water capacity | 15,000 l | |||
| Fuel capacity | 6 t (coal) | |||
Boiler
| Property | 225-236 | 237-251 | 252-269 | 270-281 |
|---|---|---|---|---|
| Grate area | 2.9 m² | |||
| Firebox surface | 11.8 m² | 12.2 m² | ||
| Tube heating surface | 156.9 m² | 156.4 m² | 116.4 m² | |
| Evaporative heating surface | 178.7 m² | 178.2 m² | 178 m² | 128.6 m² |
| Total heating surface | 178.7 m² | 178.2 m² | 178.0 m² | 168.0 m² |
| Superheater surface | 39.4 m² | |||
Power plant
| Property | 225-236 | 237-251 | 252-269 | 270-281 |
|---|---|---|---|---|
| Driver diameter | 1,960 mm | |||
| Boiler pressure | 13 bar | |||
| Expansion type | simple expansion | |||
| Cylinders | two, 470 x 600 mm | |||
Power
| Property | 225-236 | 237-251 | 252-269 | 270-281 |
|---|---|---|---|---|
| Power source | steam | |||
| Estimated power | 750 kW (1,020 PS) | 775 kW (1,054 PS) | 825 kW (1,122 PS) | |
| Top speed | 100 km/h | |||
| Starting effort | 74.7 kN | |||
Calculated values
| Property | 225-236 | 237-251 | 252-269 | 270-281 |
|---|---|---|---|---|
| Factor of adhesion | 1 : 3.68 | |||
| Optimal speed | 61 km/h | 63 km/h | 68 km/h | |
| Power-to-weight ratio | 12.4 kW/t | 12.7 kW/t | ||
| Heating Surface Equivalent | 227.7 m² | 227.2 m² | 268.4 m² | |
| Cylinder volume/HSE | 1 : 914.33 | 1 : 916.34 | 1 : 775.68 | |
| Adhesive weight/Total | 1 : 2.16 | 1 : 2.18 | ||
| Tractive force/Heating surface | 1 : 8.73 | 1 : 8.76 | 1 : 8.77 | 1 : 9.29 |
| Grate area/Heating surface | 1 : 61.62 | 1 : 61.45 | 1 : 61.38 | 1 : 57.93 |
| Firebox/Tube surface | 1 : 13.30 | 1 : 13.25 | 1 : 9.54 | |
| Total/Superheater | 1 : 3.26 | |||
