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DR Class 22

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DR Class 22
22 064 in the Bavarian Railway Museum, 1998
Type and origin
Power typeSteam
BuilderRAW Meiningen
Build date1958–1962
Total produced85
Specifications
Configuration:
​
 • Whyte2-8-2
 • UIC1′D1′ h3
 • GermanP 46.18
DriverAll cylinders to 2nd
Gauge1,435 mm (4 ft 8+1⁄2 in)
Leading dia.1,000 mm (3 ft 3+1⁄4 in)
Driver dia.1,750 mm (5 ft 8+7⁄8 in)
Trailing dia.1,100 mm (3 ft 7+1⁄4 in)
Tender wheels1,000 mm (3 ft 3+1⁄4 in)
Wheelbase:​
 • Axle spacing
(Asymmetrical)
  • 2,800 mm (9 ft 2+1⁄4 in) +
  • 2,000 mm (6 ft 6+3⁄4 in) +
  • 2,000 mm (6 ft 6+3⁄4 in) +
  • 2,000 mm (6 ft 6+3⁄4 in) +
  • 3,350 mm (11 ft 0 in) =
 • Engine12,150 mm (39 ft 10+1⁄4 in)
 • Tender
  • 1,900 mm (6 ft 2+3⁄4 in) +
  • 1,900 mm (6 ft 2+3⁄4 in) +
  • 1,900 mm (6 ft 2+3⁄4 in) =
  • 5,700 mm (18 ft 8+1⁄2 in)
 • incl. tender20,070 mm (65 ft 10+1⁄4 in)
Length:
​
 • Over headstocks22,400 mm (73 ft 5+7⁄8 in)
 • Over buffers23,700 mm (77 ft 9+1⁄8 in)
Height4,500 mm (14 ft 9+3⁄16 in)
Axle load18.5 t (18.2 long tons; 20.4 short tons)
Adhesive weight74.0 t (72.8 long tons; 81.6 short tons)
Empty weight96.4 t (94.9 long tons; 106.3 short tons)
Service weight107.5 t (105.8 long tons; 118.5 short tons)
Tender type2′2′ T 32/34 (22 001 with 2′2 T 30 from 25 001)
Fuel typeCoal
Fuel capacity10 t (9.8 long tons; 11 short tons)
Water cap.
  • 2′2′ T 32: 32.0 m (7,000 imp gal; 8,500 US gal)
  • 2′2′ T 34: 34.0 m (7,500 imp gal; 9,000 US gal)
  • 2′2′ T 30: 30.0 m (6,600 imp gal; 7,900 US gal)
Firebox:​
 • Grate area4.23 m (45.5 sq ft)
Boiler:
​
 • Pitch3,050 mm (10 ft 1⁄8 in)
 • Tube plates5,700 mm (18 ft 8+3⁄8 in)
 • Small tubes54 mm (2+1⁄8 in), 112 off
 • Large tubes143 mm (5+5⁄8 in), 36 off
Boiler pressure16 bar (16.3 kgf/cm; 232 psi)
Heating surface:​
 • Firebox21.3 m (229 sq ft)
 • Tubes98.3 m (1,058 sq ft)
 • Flues86.7 m (933 sq ft)
 • Total surface206.3 m (2,221 sq ft)
Superheater:
​
 • Heating area83.8 m (902 sq ft)
CylindersThree
Cylinder size520 mm × 660 mm (20+1⁄2 in × 26 in)
Valve gearOutside Heusinger (Walschaerts) with Winterthur slide
Train heatingSteam
Performance figures
Maximum speed110 km/h (68 mph)
Indicated power1,690 PS (1,240 kW; 1,670 hp)
Career
OperatorsDeutsche Reichsbahn
Numbers22 001 – 22 085
Retired1971

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

References

  • Heinrich, R.; Schnabel, H. (2001). Die Baureihe 22. Freiburg: EK-Verlag. ISBN 978-3-88255-122-8.
  • Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1976). Dampflokomotiven deutscher Eisenbahnen, Baureihe 01–39 (EFA 1.1) (in German) (3rd ed.). Düsseldorf: Alba Buchverlag. pp. 172–174. ISBN 3-87094-081-6.

External links

Classes of German steam locomotives
Deutsche Bundesbahn (DB) Neubaulok classes DR logo
Deutsche Bundesbahn (DB) Umbaulok (rebuild) classes
Deutsche Reichsbahn (DR) Neubaulok classes
Deutsche Reichsbahn (DR) Rekolok classes
Deutsche Reichsbahn-Gesellschaft (DRG) classes
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