Polish State Railways Ol49
Poland 1951 116 produced
The Ol49 was a 2-6-2 passenger locomotive built after World War II to replace older 2-6-2 or 4-6-0 locomotives like the Prussian P 8. It had a driver diameter of 1,750 mm and a top speed of 100 km/h. With good coal, trains of 400 tonnes could be hauled with top speed on the level, while the maximum train weight at 80 km/h was 905 tonnes.
Between 1951 and 1954, 112 were built for the PKP and four for North Korea. An optical feature was the combination of a high pitched boiler and high running boards. In Poland, they got the nickname “Oelki”. Some had Trofimoff valves and some were converted to oil firing. 38 are preserved, some of which have run in preservation.
Technical data
General
- Built
- 1951-1954
- Manufacturers
- Fablok
- Wheel arrangement
- 2-6-2 (Prairie)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 20.68 m
- Length loco
- 10.25 m
- Wheelbase
- 17.57 m
- Total wheelbase
- 4.00 m
- Empty mass
- 75.1 t
- Service mass
- 83.3 t
- Adhesion mass
- 51.4 t
- Total mass
- 151.4 t
- Axle load
- 17.2 t
- Water capacity
- 25,000 l
- Fuel capacity
- 12 t (coal)
Boiler
- Grate area
- 3.7 m²
- Firebox surface
- 16.7 m²
- Tube heating surface
- 146.2 m²
- Evaporative heating surface
- 162.9 m²
- Superheater surface
- 68.3 m²
- Total heating surface
- 231.2 m²
Power plant
- Driver diameter
- 1,750 mm
- Boiler pressure
- 16 bar
- Expansion type
- simple expansion
- Cylinders
- two, 500 x 630 mm
Power
- Power source
- steam
- Estimated power
- 1,200 kW (1,632 PS)
- Top speed
- 100 km/h
- Starting effort
- 122.4 kN
Calculated values
- Factor of adhesion
- 1 : 4.12
- Optimal speed
- 60 km/h
- Power-to-weight ratio
- 14.4 kW/t
- Heating Surface Equivalent
- 383.0 m²
- Cylinder volume/HSE
- 1 : 645.95
- Adhesive weight/Total
- 1 : 1.62
- Tractive force/Heating surface
- 1 : 11.06
- Grate area/Heating surface
- 1 : 62.49
- Firebox/Tube surface
- 1 : 8.75
- Total/Superheater
- 1 : 2.39
