State Railway Company Ie
State Railway Company class 25, Imperial-Royal State Railways class 506, and Czechoslovak State Railways class 264.3
At a time when other railways were changing from two-cylinder simples to two-cylinder compounds, the StEG built a three-cylinder compound 4-4-0 in their own shops. It was completed in 1897 and originally numbered 144. But in the same year, the new scheme made it class 25, with the number 2501. It had drivers of 2,120 mm and a long driving wheelbase of 2,800 mm to ensure good running characteristics. However, its compound system was not convincing so that it was soon used as a two-cylinder simple without its central cylinder working. When the StEG was nationalized in 1907, this single locomotive became kkStB class 506. After World War I, it was still in service in Czechoslovakia. The ČSD used it as 264.301 until 1926.
Technical data
General
- Built
- 1897
- Manufacturers
- StEG
- Wheel arrangement
- 4-4-0 (American)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length loco
- 9.96 m
- Wheelbase
- 7.00 m
- Rigid wheelbase
- 2.80 m
- Empty weight
- 47.6 t
- Service weight
- 53.4 t
- Adhesive weight
- 28 t
- Axle load
- 14 t
- Total weight
- 85.4 t
- Water capacity
- 13,500 l
- Fuel capacity
- 5 t (coal)
Boiler
- Grate area
- 2.9 m²
- Firebox surface
- 12 m²
- Tube heating surface
- 153 m²
- Evaporative heating surface
- 165 m²
- Total heating surface
- 165.0 m²
Power plant
- Driver diameter
- 2,120 mm
- Boiler pressure
- 13 bar
- Expansion type
- compound
- Cylinders
- three, HP: 470 x 650 mm and LP: 500 x 650 mm
Power
- Power source
- steam
- Estimated power
- 700 kW (952 PS)
- Starting effort
- 59.6 kN
- Starting effort simple
- 71.5 kN
Calculated values
- Factor of adhesion
- 1 : 3.84
- Optimal speed
- 72 km/h
- Power-to-weight ratio
- 13.1 kW/t
- Heating Surface Equivalent
- 225.0 m²
- Cylinder volume/HSE
- 1 : 1,177.23
- Adhesive weight/Total
- 1 : 1.91
- Tractive force/Heating surface
- 1 : 9.05
- Grate area/Heating surface
- 1 : 56.90
- Firebox/Tube surface
- 1 : 12.75