DR Class 22
| DR Class 22 | |
|---|---|
 | |
| Number(s): | 22 001–085 |
| Quantity: | 85 |
| Manufacturer: | Raw Meiningen |
| Year(s) of manufacture: | 1958–1962 |
| Retired: | 1971 |
| Wheel arrangement: | 2-8-2 |
| Axle arrangement: | 1'D1' h3 |
| Type: | P 46.18 |
| Gauge: | 1,435 mm (4 ft 8 1⁄2 in) |
| Length over buffers: | 23,700 mm |
| Service weight: | 107.5 t |
| Adhesive weight: | 74.0 t |
| Axle load: | 18.7 t |
| Top speed: | 110 km/h |
| Indicated Power: | 1,690 PS |
| Driving wheel diameter: | 1,750 mm |
| Leading wheel diameter: | 1,000 mm |
| Trailing wheel diameter: | 1,100 mm |
| Valve gear: | outside valve gear with Winterthur slide |
| No. of cylinders: | 3 |
| Cylinder bore: | 520 mm |
| Piston stroke: | 660 mm |
| Boiler Overpressure: | 16 bar |
| Grate area: | 4.23 m² |
| Radiative heating area: | 21.3 m² |
| Superheater area: | 83.80 m² |
| Evaporative heating area: | 206.30 m² |
| Tender: | 2'2' T 32/34 (22 001 with 2`2 T30 from 25 001) |
| Water capacity: | 32.0/34.0 m³ (22 001 30 m³) |
| Fuel: | 10 t stone coal |
| Train heating: | Steam |
| Features: | 22 001 was given a Knorr feedwater heater and Riggenbach counterpressure brake instead of the MV equipment |
The steam locomotives of DR Class 22 were reconstructed passenger train locomotives in service with the Deutsche Reichsbahn in East Germany after the Second World War.
These engines were rebuilt from DRG Class 39.0-2 locomotives and appeared between 1958 and 1962 as part of the reconstruction programme. The latter had a significant problem: the boiler did not generate enough steam and the steam pipes were too winding, which considerably reduced the maximum power of the engine. A total of 85 examples were equipped with a new combustion-chambered boiler with an IfS mixer-preheater. The locomotive frame had to be extended to accommodate the new engine. The wider outer firebox meant that the driver's cab needed a modified rear wall. The locomotives were given operating numbers 22 001–085 and were mainly homed in the Reichsbahn divisions of Dresden and Erfurt.
The DR employed the locomotives on heavy express train duties in the schedules for the DRG Class 01, which led to overloading of the original components (frame cracks, piston damage). As a result, early retirement followed. In 1968, 50 of the 85 Reko boilers from the Class 22 were used for the reconstruction of the DRG Class 03.
In 1970 the engines were allocated to Class 39 under the DR's new computerised numbering scheme. However in 1970 only a few machines were still working, at Halberstadt and Saalfeld. In 1971 the last one was withdrawn. Up to the early 1990s, nine engines were used as steam generators.
The vehicles were equipped with 2'2' T 32 or 2'2' T 34 tenders.
See also
- List of East German Deutsche Reichsbahn locomotives and railbuses
- Rekolok
- List of preserved steam locomotives in Germany
References
- Heinrich, R.; Schnabel, H. (2001). Die Baureihe 22. Freiburg: EK-Verlag. ISBN 978-3-88255-122-8.
External links
- Bilder und Daten historischer Loks
- There is a relevant English-language forum at Railways of Germany
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