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
Length over buffers:	23,905 mm
Service weight:	106.3 t
Adhesive weight:	59.5 t
Top speed:	140 km/h
Indicated Power:	1,545–1,706 kW (depending on build state)
Driving wheel diameter:	2,000 mm
Leading wheel diameter:	1,000 mm
Trailing wheel diameter:	1,250 mm
No. of cylinders:	4
Cylinder bore:	2×350/520 mm
Piston stroke:	660 mm
Boiler Overpressure:	25 bar
Grate area:	4.10 m²
Tube heating area:	84.60 m²
Superheater area:	206.80 m²
Tender:	2'2 T 32
Water capacity:	32.0 m³

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 N/cm² to 245.1 N/cm² 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 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.

See also

• List of DRG locomotives and railbuses

External links

• Technical data and picture
• There is a relevant English-language forum at Railways of Germany