DRB Class 06

Summary

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.

DRB Class 06
DB Class 06
Type and origin
Power typeSteam
BuilderKrupp
Serial number2000–2001
Build date1939
Total produced2
Specifications
Configuration:
 • Whyte4-8-4
 • UIC2′D2′ h3
 • GermanS 48.20 / 18
DriverDivided: inside on 1st,
outside on 2nd
Gauge1,435 mm (4 ft 8+12 in)
Leading dia.1,000 mm (3 ft 3+38 in)
Driver dia.2,000 mm (6 ft 6+34 in)
Trailing dia.1,000 mm (3 ft 3+38 in)
Tender wheels1,100 mm (3 ft 7+14 in)
Wheelbase:
 • Axle spacing
(Asymmetrical)
  • 2,200 mm (7 ft 2+58 in) +
  • 1,850 mm (6 ft 78 in) +
  • 2,250 mm (7 ft 4+58 in) +
  • 2,250 mm (7 ft 4+58 in) +
  • 2,250 mm (7 ft 4+58 in) +
  • 1,925 mm (6 ft 3+34 in) +
  • 1,800 mm (5 ft 10+78 in) =
 • Engine14,525 mm (47 ft 7+78 in)
 • Tender
  • 1,750 mm (5 ft 8+78 in) +
  • 1,500 mm (4 ft 11 in) +
  • 1,375 mm (4 ft 6+18 in) +
  • 1,375 mm (4 ft 6+18 in) =
  • 6,000 mm (19 ft 8+14 in)
 • incl. tender22,450 mm (73 ft 7+78 in)
Length:
 • Over headstocks25,220 mm (82 ft 8+78 in)
 • Over buffers26,520 mm (87 ft 18 in)
Height4,550 mm (14 ft 11+18 in)
Axle load20.0 t (19.7 long tons; 22.0 short tons)
Adhesive weight80.0 t (78.7 long tons; 88.2 short tons)
Empty weight129.8 t (127.8 long tons; 143.1 short tons)
Service weight141.8 t (139.6 long tons; 156.3 short tons)
Tender type2′3 T 38 St
Fuel typeCoal
Fuel capacity10 t (9.8 long tons; 11 short tons)
Water cap.38 m3 (8,400 imp gal; 10,000 US gal)
Firebox:
 • Grate area5.04 m2 (54.3 sq ft)
Boiler:
 • Pitch3,060 mm (10 ft 12 in)
 • Tube plates7,500 mm (24 ft 7+14 in)
 • Small tubes83 mm (3+14 in), 72 off
 • Large tubes191 mm (7+12 in), 33 off
Boiler pressure20 bar (20.4 kgf/cm2; 290 psi)
Heating surface:
 • Firebox18.8 m2 (202 sq ft)
 • Tubes130.0 m2 (1,399 sq ft)
 • Flues140.2 m2 (1,509 sq ft)
 • Total surface289.0 m2 (3,111 sq ft)
Superheater:
 • Heating area132.5 m2 (1,426 sq ft)
CylindersThree
Cylinder size520 mm × 720 mm (20+12 in × 28+38 in)
Valve gearHeusinger (Walschaerts)
Performance figures
Maximum speed140 km/h (87 mph)
Indicated power2,800 PS (2,060 kW; 2,760 hp)
Career
Operators
  • Deutsche Reichsbahn
  • Deutsche Bundesbahn
Numbers06 001 – 06 002
Retired1951
DispositionBoth scrapped

History edit

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 (75 mph). On ramps of 1:100 it was to still be capable of maintaining 60 km/h (37 mph).

The Class 06 was given 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 (22.1 ft)

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 World War II a locomotive of this size was no longer needed, thus 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 edit

References edit

  • 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 edit

  • Photograph of the Class 06