DRG Class 03

The Class 03 steam engines were standard express train locomotives (Einheitslokomotiven) in service with the Deutsche Reichsbahn.

DRG Class 03
03 001
Number(s)03 001–298
Quantity298
Wheel arrangement4-6-2
Axle arrangement2′C1′ h2
Type03 001–122: S 36.17
03 123–298: S 36.18
Track gauge1,435 mm (4 ft 8 1⁄2 in)
Length over buffers23.905 m (78 ft 5 in)
Empty weight03 001–162: 90.4 tonnes (89.0 long tons; 99.6 short tons)
03 163–298: 91.0 tonnes (89.6 long tons; 100.3 short tons)
Service weight03 001–122: 99.6 tonnes (98.0 long tons; 109.8 short tons)
03 123–298: 100.3 tonnes (98.7 long tons; 110.6 short tons)
Adhesive weight03 001–122: 53.0 tonnes (52.2 long tons; 58.4 short tons)
03 123–298: 54.3 tonnes (53.4 long tons; 59.9 short tons)
Axle load03 001–162: 17.7 tonnes (17.4 long tons; 19.5 short tons)
03 163–298: 18.1 tonnes (17.8 long tons; 20.0 short tons)
Top speed03 001–162: 120 km/h (75 mph)
03 163–298: 130 km/h (81 mph)
Reverse: 50 km/h (31 mph)
Indicated Power1,970 PS (1,449 kW; 1,943 hp)
Starting tractive effort161.8 kN (36,300 lbf)
Driving wheel diameter2,000 mm (78.74 in)
Leading wheel diameter03 001–162: 850 mm (33.46 in)
03 163–298: 1,000 mm (39.37 in)
Trailing wheel diameter1,250 mm (49.21 in)
No. of cylindersTwo
Cylinder bore570 mm (22.44 in) on 03 001-003
originally 600 mm (23.62 in)
Piston stroke660 mm (25.98 in)
Boiler Overpressure16.0 bar (1.60 MPa; 232 psi)
Grate area3.97 m2 (42.7 sq ft)
Superheater area70.00 m2 (753.5 sq ft)
Evaporative heating area201.96 m2 (2,173.9 sq ft)
Tender2′2 T30/32/34
Water capacity30 m3 (1,100 cu ft)
32 m3 (1,100 cu ft)
34 m3 (1,200 cu ft)
FuelCoal
Brakesautomatic, single-chamber Knorr compressed air brakes to 03 162
coupled and bogie wheels, one-sided, from 03 163
both sides of coupled wheels and one-sided on trailing wheels
Auxiliary brakeyes
Train heatingSteam
Train controloutside Walschaerts valve gear
Featuressome engines could run at 140 km/h (87 mph)

History
03 1010 in Meiningen

The Class 03 engines were built between 1930 and 1938 as express train locomotives for routes that were only suitable for axle loads of up to 18 tonnes. 298 examples of this engine, whose construction was based on the Class 01, were built by the firms of Borsig, Krupp, Henschel, and Schwartzkopff.

Its reduced weight was achieved by the use of a light sectional frame, smaller boiler and smaller cylinders. From engine number 03 123 onwards the pumps were located in the centre of the locomotive and from number 03 163 the locos had larger leading wheels.

Locomotive number 03 154 was equipped with a parabolic smokebox door, a tapered driver's cab and driving gear cover plates. Number 03 193 was given a wine-red, streamlined, full covering and a 2′3 T 37 St tender, in order to replace the Class 05. 03 204 and 03 205 had driving gear cover plates for experimental purposes. Locomotive numbers 03 175 and 03 207 had Lentz valve gear, also as an experiment.

Until 1959, 145  Class 03 locomotives were in the Deutsche Bundesbahn's operating fleet, of which 62 engines (03 005 to 03 122) had air and feed pumps on the smokebox, small leading wheels (850 mm diameter) and a top speed of 120 km/h, 16 machines (03 127 to 03 160) had air and feed pumps between the middle and rear driving wheels, small leading wheels (850 mm diameter) and a top speed of 120 km/h and 67 engines (03 164 to 03 296) had air and feed pumps between the middle and rear driving wheels, scissor-block brakes (Scherenklotzbremsen), large leading wheels (1,000 mm diameter) and a top speed of 130 km/h.

In 1968 there were still 45 units, now designated as Class 003, remaining in the operational fleet. They were stabled at the following locomotive sheds: two at the Braunschweig shed, six at Bremen Main Station, 13 at Hamburg-Altona, one at Husum, 16 in Mönchengladbach and seven at Ulm.

The last ten locomotives of Class 003 were on duty from 1971 at Ulm; in 1972 the last ones, nos. 003 088, 003 131 and 003 268, were withdrawn from service.

The DR in East Germany had 86 engines in its fleet. From 1962 they equipped their vehicles with mixer preheaters.

An 03 running in Poland as PKP No. Pm2-34, today preserved at Warsaw, near Toruń with a northbound freight; 1976

35 03 pacifics went to Poland after World War 2, along with ten streamlined 03.10s. The Polish version of the Class 03, the Pm2 (running number 34), can be seen at the railway museum in Warsaw.

The locomotives of this class had 2′2 T 30, 2′2′ T 32 and 2′2′ T 34 tenders.

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See also
  • List of DRG locomotives and railbuses

Literature
  • Troche, Horst (2006). Die Baureihe 03 (in German). Freiburg: EK-Verlag. ISBN 978-3-88255-133-4.
  • Nagel, Gustav (2002). "Baureihe 03. Im Führerstand". Lok Magazin (in German). München: GeraNova Zeitschriftenverlag GmbH. 41 (248): 52–55. ISSN 0458-1822.
  • Rotthowe, Ludwig (2002). "Und keiner wollte sie haben... . Die 03.10 bei der DB". Lok Magazin (in German). München: GeraNova Zeitschriftenverlag GmbH. 41 (252): 54–61. ISSN 0458-1822.
  • Vetter, Klaus J. Das große Handbuch deutscher Lokomotiven (in German). Bruckmanns Spezial Verlag. ISBN 3-7654-3764-6.
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