| Bgcolor | A00 |
|---|---|
| Color | FFF |
| Powertype | Steam |
| Builder | Krupp |
| Serialnumber | 2000–2001 |
| Builddate | 1939 |
| Totalproduction | 2 |
| Uicclass | 2′D2′ h3S |
| Drgtype | S 48.20 / 18 |
| Driver | Divided: inside cylinder to first coupled axle, outside to second |
| Leadingdiameter | 1,000 mm (3 ft 3 in) |
| Driverdiameter | 2,000 mm (6 ft 7 in) |
| Trailingdiameter | 1,000 mm (3 ft 3 in) |
| Tenderdiameter | 1,100 mm (3 ft 7 in) |
| Wheelspacing |
|
| Engine total | 14,525 mm (47 ft 8 in) |
| Tender total |
|
| Wheelbasewithtender | 22,450 mm (73 ft 8 in) |
| Over headstocks | 25,220 mm (82 ft 9 in) |
| Over buffers | 26,520 mm (87 ft 0 in) |
| Height | 4,550 mm (14 ft 11 in) |
| Axleload | 20.0 t (19.7 long tons; 22.0 short tons) |
| Weightondrivers | 80.0 t (78.7 long tons; 88.2 short tons) |
| Emptyweight | 129.8 t (127.8 long tons; 143.1 short tons) |
| Serviceweight | 141.8 t (139.6 long tons; 156.3 short tons) |
| Tendertype | 2′3 T 38 St |
| Fueltype | Coal |
| Fuelcap | 10 t (9.8 long tons; 11 short tons) |
| Watercap | 38 m3 (8,400 imp gal; 10,000 US gal) |
| Firearea | 5.04 m2 (54.3 sq ft) |
| Pitch | 3,060 mm (10 ft 0 in) |
| Lengthinside | 7,500 mm (24 ft 7 in) |
| Smalltubediameter | 83 mm (3.3 in), 72 off |
| Largetubediameter | 191 mm (7.5 in), 33 off |
| Boilerpressure | 20 bar (290 psi) |
| Fireboxarea | 18.8 m2 (202 sq ft) |
| Tubearea | 130.0 m2 (1,399 sq ft) |
| Fluearea | 140.2 m2 (1,509 sq ft) |
| Totalsurface | 289.0 m2 (3,111 sq ft) |
| Superheaterarea | 132.5 m2 (1,426 sq ft) |
| Cylindercount | Three |
| Cylindersize | 520 by 720 mm (20 by 28 in) |
| Valvegear | Heusinger (Walschaerts) |
| Maxspeed | 140 km/h (87 mph) |
| Indicatedpower | 2,800 PS (2,060 kW; 2,760 hp) |
| Operator |
|
| Fleetnumbers | 06 001 – 06 002 |
| Retiredate | 1951 |
| Disposition | Both scrapped |
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 (75 mph). On ramps of 1:100 it was still to 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.
