DRG Class 04
| DRG Class 04/02.1 | |
|---|---|
| Number(s) | DRG 02 101–102 |
| Quantity | 2 |
| Manufacturer | Krupp |
| Year(s) of manufacture | 1932 |
| Retired | 1939 |
| Wheel arrangement | 4-6-2 |
| Axle arrangement | 2'C1' |
| Type | S 36.18 |
| Gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Length over buffers | 23,905 mm (78 ft 5 in) |
| Service weight | 106.3 t (104.6 long tons; 117.2 short tons) |
| Adhesive weight | 59.5 t (58.6 long tons; 65.6 short tons) |
| Top speed | 140 km/h (87 mph) |
| Indicated Power | 1,545–1,706 kW (2,072–2,288 hp) (depending on build state) |
| Driving wheel diameter | 2,000 mm (78.74 in) |
| Leading wheel diameter | 1,000 mm (39.37 in) |
| Trailing wheel diameter | 1,250 mm (49.21 in) |
| No. of cylinders | 4 |
| Cylinder bore | 2×350 mm (13.78 in)/520 mm (20.47 in) |
| Piston stroke | 660 mm (25.98 in) |
| Boiler Overpressure | 25 bar (2,500 kPa; 360 psi) |
| Grate area | 4.10 m2 (44.1 sq ft) |
| Tube heating area | 84.60 m2 (910.6 sq ft) |
| Superheater area | 206.80 m2 (2,226.0 sq ft) |
| Tender | 2'2 T 32 |
| Water capacity | 32.0 m3 (1,130 cu ft) |
The two German Class 04 steam locomotives were experimental engines with the Deutsche Reichsbahn, that were derived from the Class 03 standard locomotives (Einheitsloks).
History
In 1932 the Deutsche Reichsbahn tried to raise boiler overpressures from 156.9 to 245.1 N/cm2 (227.6 to 355.5 psi) by using high-tensile steel. These vehicles, built by the firm of Krupp, soon showed signs of damage on the firebox however. Because the engines did not meet expectations even after modification and repairs, in 1935 the pressure was reduced to 156.9 N/cm2 (227.6 psi) again and they were given operating numbers 02 101 and 02 102. Due to a lack of water the boiler on 02 101 exploded on 3 April 1939; after that both engines were retired and eventually scrapped in 1940.
The engines were equipped with a 2'2' T 32 standard tender.