DRB Class 06

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DRB Class 06
Type and origin Builder Krupp Build date 1939 Total produced 2
Specifications Configuration: ​  • Whyte 4-8-4  • UIC  • German S 48.18 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 1,000 mm (39.37 in) Driver dia. 2,000 mm (78.74 in) Trailing dia. 1,000 mm (39.37 in) Length: ​  • Over beams 26.52 m (87 ft 0 in) Axle load 20.0 t (19.7 long tons; 22.0 short tons) Adhesive weight 80.0 t (78.7 long tons; 88.2 short tons) Service weight 141.8 t (139.6 long tons; 156.3 short tons) Water cap. 38,000 L (8,400 imp gal; 10,000 US gal) Boiler pressure 20 bar (2.0 MPa; 290 psi) Heating surface:  • Firebox 4.82 m2 (51.9 sq ft)  • Evaporative 288.54 m2 (3,105.8 sq ft) Superheater: ​  • Heating area 132.5 m2 (1,426 sq ft) Cylinder size 520 mm (20.47 in) Piston stroke 720 mm (28.35 in)
Performance figures Maximum speed 140 km/h (87 mph) Indicated power 2,059 kW (2,761 hp)
Career Numbers DRB 06 001–002 Retired 1951

The German DRB Class 06 engines were standard steam locomotives (Einheitsdampflokomotiven) with the Deutsche Reichsbahn (DRB) designed to haul express train services. They were the only German locomotives with a 4-8-4 (Northern) wheel arrangement.

History[]

The two Class 06 locomotives built by the firm of Krupp in 1939 were the largest, heaviest and most powerful locomotives in the Deutsche Reichsbahn. They were built for heavy express train duties in hilly terrain. The performance requirement was for the transportation of 650 tons at 120 km/h. On ramps of 1:100 it was to still to be capable of maintaining 60 km/h.

The Class 06 was give the same boiler as the Class 45 and many of the same components as the Class 41. The running gear, with four coupled axles, had a wheelbase of 6,75 m.

In trials, the vehicles confirmed their remarkable capability and running qualities. However the locomotives tended to derail in tight turnout curves. And, like the Class 45s, the boilers developed cracks, leaky tubes and popped stay bolts, so that the locomotives were unconvincing when hauling measurement vehicles or scheduled trains.

As a result of the war no more were produced. After the Second World War there was no longer a requirement for a locomotive of this size, so that neither the necessary structural modification of the engines was carried out, nor did any follow-on orders result. Both engines were seen as having a faulty design and were retired by the Deutsche Bundesbahn in 1951 in Frankfurt am Main and scrapped, because the DB refused to replace their boilers.

The two locomotives, which had operating numbers 06 001 and 06 002, were equipped with 2'3 T 38 St tenders.

See also[]

• List of DRG locomotives and railbuses

References[]

• Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1976). Dampflokomotiven deutscher Eisenbahnen, Baureihe 01–39 (EFA 1.1) (in German) (3rd ed.). Düsseldorf: Alba Buchverlag. pp. 63–65. ISBN 3-87094-081-6.

External links[]

• Photograph of the Class 06