PKP series Tr20
| PKP series Tr 20 ČSD series 437.25 DR series 56.37–38 |
|
|---|---|
| Number: | 175 |
| Manufacturer: | Baldwin , Philadelphia |
| Year of construction (s): | 1919-1922 |
| Retirement: | until 1974 |
| Axis formula : | 1'D h2 |
| Gauge : | 1435 mm ( standard gauge ) |
| Empty mass: | 75.6 t |
| Friction mass: | 67.2 t |
| Wheel set mass : | 17.5 t |
| Top speed: | 65 km / h |
| Driving wheel diameter: | 1,420 mm |
| Impeller diameter: | 820 mm |
| Number of cylinders: | 2 |
| Cylinder diameter: | 535 mm |
| Piston stroke: | 715 mm |
| Boiler overpressure: | 13.5 bar |
| Grate area: | 2.97 m 2 |
| Superheater area : | 30.7 m² |
| Evaporation heating surface: | 160.8 m² |
The PKP class Tr20 were locomotives with a tender for the freight train service of the Polish State Railways PKP.
history
Of these locomotives, 175 machines were produced in the American locomotive works Baldwin Locomotive Works , Philadelphia , after the First World War . The development concerned a locomotive for military purposes for the army.
It had a small grate. The steam pressure was 13.5 bar, and the size of the firebox indicated the need for good quality fuel. The locomotive was described as unsightly and uselessly heavy .
DR series 56.37–38
144 machines drove on the Polish State Railways PKP and were designated as DR series 56.37-38 during the Second World War .
Stationing data cannot be found in the literature. They were retired by 1974.
ČSD 437.25
Two locomotives remained with the ČSD after the Second World War and were designated as the 437.25 series. They were left in operation in the Ostrava area . They were shut down within a short time and returned to the PKP in 1950.
See also
- List of locomotive and multiple unit series in Poland
- List of locomotive and multiple unit series of the ČSD
literature
- Jindřich Bek, Josef Janata, Jaroslav Veverka: Malý atlas lokomotiv 1, Parní lokomotivy, Nadas, Praha.
Individual evidence
- ↑ Bek Jindrich, Janata Josef, Veverka Jaroslav: Malý atlas lokomotiv 1, Parny lokomotivy, Nadas-Verlag Prague, page 140