DRG Class 02 - Misplaced Pages

Class of German 4-6-2 locomotives (1925-1942)

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DRG Class 02

02 008 in June 1932

Type and origin
Power type	Steam
Builder	Henschel & Sohn (8) Maffei (2)
Serial number	Henschel 20460–20467 Maffei 5621–5622
Build date	1925–1926
Total produced	10

Specifications
Configuration:
• Whyte	4-6-2
• UIC	2′C1′ h4v
• German	S 36.20
Driver	2nd coupled axle for all cylinders
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	0,850 mm (33+1⁄2 in)
Driver dia.	2,000 mm (78+3⁄4 in)
Trailing dia.	1,250 mm (49+1⁄4 in)
Wheelbase:
• Axle spacing (Asymmetrical)	2,200 mm (7 ft 2+5⁄8 in) + 1,800 mm (5 ft 10+7⁄8 in) + 2,300 mm (7 ft 6+1⁄2 in) + 2,300 mm (7 ft 6+1⁄2 in) + 3,800 mm (12 ft 5+5⁄8 in)
• incl. tender	20,320 mm (66 ft 8 in)
Length:
• Over buffers	23,750 mm (77 ft 11 in)
Height	4.550 m (14 ft 11+1⁄8 in)
Axle load	20.1 tonnes (19.8 long tons; 22.2 short tons)
Adhesive weight	60.3 tonnes (59.3 long tons; 66.5 short tons)
Empty weight	103.9 tonnes (102.3 long tons; 114.5 short tons)
Service weight	113.5 tonnes (111.7 long tons; 125.1 short tons)
Tender type	2′2 T 32 (2′2 T 30)
Fuel type	Coal
Fuel capacity	10.0 tonnes (9.8 long tons; 11.0 short tons)
Water cap.	32 or 30 m (7,040 or 6,600 imp gal; 8,450 or 7,930 US gal)
Firebox:
• Grate area	4.41 m (47.5 sq ft)
Boiler:
• Pitch	3,100 mm (10 ft 2 in)
• Tube plates	5,800 mm (19 ft 3⁄8 in)
• Small tubes	54 mm (2+1⁄8 in), 129 off
• Large tubes	143 mm (5+5⁄8 in), 43 off
Boiler pressure	16 bar (16.3 kgf/cm; 232 psi)
Heating surface:
• Firebox	17.0 m (183 sq ft)
• Tubes	115.18 m (1,239.8 sq ft)
• Flues	105.38 m (1,134.3 sq ft)
• Total surface	237.56 m (2,557.1 sq ft)
Superheater:
• Heating area	100.0 m (1,076 sq ft)
Cylinders	Four (compound): two high-pressure (HP) inside, two low-pressure (LP) outside
High-pressure cylinder	460 mm × 660 mm (18+1⁄8 in × 26 in)
Low-pressure cylinder	720 mm × 660 mm (28+3⁄8 in × 26 in)
Valve gear	Walschaerts (Heusinger)
Train heating	Steam
Loco brake	Knorr single-chamber, compressed air brakes, operating on front of all coupled wheels

Performance figures
Maximum speed	fwds: 130 km/h (81 mph) bwds: 50 km/h (31 mph)
Indicated power	2,300 PS (1,690 kW; 2,270 hp)

Career
Numbers	DRG 02 001 to 02 010
Disposition	Rebuilt to DRG Class 01 (1937–1942)

The German DRG Class 02 (Baureihe 02 or BR 02) engines were standard (Einheitslokomotiven) express train locomotives with the Deutsche Reichsbahn-Gesellschaft. Number 02 001 was the first Einheitsdampflokomotive in the DRG to be completed.

In procuring a standard express train steam locomotive, the Deutsche Reichsbahn carried out a comparison between a superheated two-cylinder type (the DRG Class 01) and a four-cylinder compound locomotive (the Class 02). Ten examples of each type were built from 1925, and the Class 02 vehicles were given operating numbers 02 001 – 02 010. The first eight engines were manufactured in 1925 by the firm of Henschel, two more were built in 1926 by Maffei.

Because the Class 02 steam engines were badly designed, the compound engine could only produce a high level of power at speeds of over 70 km/h. In addition, below 100 PSi its steam consumption was higher than that of the Class 01.

Compared with the Class 01s, these engines had a complicated, and therefore maintenance-intensive, drive; as a result no more were ordered. From 1937 to 1942 the vehicles were successively converted to two-cylinder simple operation and regrouped as Class 01s with the new numbers 01 011 and 01 233 to 01 241.

The first eight engines were equipped with 2'2' T 30 tenders; the other two with 2'2 T 32 tenders. Later on, the second tender was coupled to all of the first eight engines as well.

Literature

Maidment, David (2017). The German Pacific Locomotive: Its Design and Development. Locomotive Portfolios series. Barnsley, South Yorkshire, UK: Pen & Sword Transport. ISBN 9781473852495.
Deutsche Eisenbahnen (in German). Weltbild Verlag.
Weisbrod, Manfred; Petznick, Wolfgang. Baureihe 01 (in German). Transpress Verlag.
Großes Lok-Portrait 01.05 (in German). Freiburg: EK Verlag.
Koschinski, Konrad (2006). Legendäre Baureihe 01. Eisenbahn-Journal (in German) (Sonderausgabe 2006,2 ed.). Verlagsgruppe Bahn. ISBN 3-89610-156-0.
Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1976). Dampflokomotiven deutscher Eisenbahnen, Baureihe 01–39 (EFA 1.1) (in German) (3rd ed.). Düsseldorf: Alba Buchverlag. pp. 36–38, 242. ISBN 3-87094-081-6.

External links

Photos of locomotive 02 003

v t e Classes of Deutsche Reichsbahn locomotive
Express train tender locomotives	01 01.10 02 02.1 03 03.10 04 05 06 19.10
Passenger train tender locomotives	23 24
Goods train tender locomotives	41 42 43 44 45 50 52 56.2–8
Express train tank locomotives	61
Passenger train tank locomotives	62 64 71.0
Goods train tank locomotives	80 81 84 85 86 87 89.0
Rack railway, branch line & narrow gauge locomotives	97.5 98.10 98.11 99.19 99.21 99.22 99.31 99.32 99.73–76
Electric locomotives	E 04 E 05 E 06.1 E 15 E 16 E 16.5 E 17 E 18 E 19 E 21 E 21.5 E 44 E 60 E 63 E 75 E 77 E 80 E 91 E 93 E 94 E 95 E 178 E 244
Diesel locomotives	V 3001 V 3201 V 3601 V 3602 V 3801 Kö I Köf II
Railbuses and multiple units	ET 25 ET 25.1 ET 31 ET 41 ET 51 ET 51.1 ET 55 ET 65 ET 82 ET 85 ET 87 ET 89 ET 91 SVT 125 SVT 137 ET 165 ET 166 ET 167 ET 168 ET 169 ET 171 SVT 877 Wismar
State railway locomotive lists	Baden Bavaria Mecklenburg Oldenburg Palatinate Prussia Saxony Württemberg

Categories:

See also

Literature

External links