DRG Class 71.0

Class of 6 German 2–4–2T locomotives

4 ft 8+1⁄2 in)Leading dia.850 mm (2 ft 9+1⁄2 in)Driver dia.

001–002: 1,500 mm (4 ft 11 in)
003–006: 1,600 mm (5 ft 3 in)

Trailing dia.850 mm (2 ft 9+1⁄2 in)Wheelbase: • Axle spacing
(Asymmetrical)

2,700 mm (8 ft 10+1⁄4 in) +
3,000 mm (9 ft 10+1⁄8 in) +
2,700 mm (8 ft 10+1⁄4 in) =

• Engine8,400 mm (27 ft 6+3⁄4 in)Length:
• Over headstocks10,500 mm (34 ft 5+3⁄8 in) • Over buffers11,800 mm (38 ft 8+5⁄8 in)Height4,165 mm (13 ft 8 in)Axle load15.0 t (14.8 long tons; 16.5 short tons)Adhesive weight

001–002: 29.9 t (29.4 long tons; 33.0 short tons)
003–006: 30.0 t (29.5 long tons; 33.1 short tons)

Empty weight

001–002: 45.4 t (44.7 long tons; 50.0 short tons)
003–006: 45.62 t (44.90 long tons; 50.29 short tons)

Service weight

001–002: 48.6 t (47.8 long tons; 53.6 short tons)
003–006: 58.61 t (57.68 long tons; 64.61 short tons)

Fuel typeCoalFuel capacity

001–002: 3.0 t (3.0 long tons; 3.3 short tons)
003–006: 2.8 t (2.8 long tons; 3.1 short tons)

Water cap.7 m³ (1,500 imp gal; 1,800 US gal)Firebox: • Grate area

001–002: 1.37 m² (14.7 sq ft)
003–006: 1.38 m² (14.9 sq ft)

Boiler:
• Pitch2,900 mm (9 ft 6+1⁄8 in) • Tube plates3,500 mm (11 ft 5+3⁄4 in) • Small tubes44.5 mm (1+3⁄4 in), 70 off • Large tubes118 mm (4+5⁄8 in), 26 offBoiler pressure20 bar (20.4 kgf/cm²; 290 psi)Heating surface: • Firebox

001–002: 5.53 m² (59.5 sq ft)
003–006: 5.89 m² (63.4 sq ft)

• Tubes30.4 m² (327 sq ft) • Flues31.5 m² (339 sq ft) • Total surface

001–002: 67.43 m² (725.8 sq ft)
003–006: 67.79 m² (729.7 sq ft)

Superheater:
• Heating area28.6 m² (308 sq ft)CylindersTwo, outsideCylinder size

001–002: 310 mm × 660 mm (12+3⁄16 in × 26 in)
003–006: 330 mm × 660 mm (13 in × 26 in)

Valve gearHeusinger (Walschaerts)

Performance figures
Maximum speed	001–002: 90 km/h (56 mph) 003–006: 100 km/h (62 mph)
Indicated power	570 PS (419 kW; 562 hp)

Career
Operators	Deutsche Reichsbahn → Deutsche Bundesbahn
Numbers	71 001 – 71 006
Retired	1955–1956

The German DRG Class 71.0 was a 2-4-2T locomotive with the Deutsche Reichsbahn, which was intended as a replacement for railbuses. Originally it had been planned for these standard engines (Einheitsloks) to haul fast passenger trains.

Two vehicles were delivered in 1934 by the firm of Schwartzkopff and two each in 1936 by the firms of Borsig and Krupp. The two-cylinder superheated engines were equipped with automatic underfeed stokers for one-man operation. In the course of its service the boiler overpressure was reduced from 20 bar to 16 bar for safety reasons. All the locomotives had a plate frame. The second coupled wheelset was driven and the carrying wheels rested in Bissel axles.

The Deutsche Bundesbahn took over all the engines after the Second World War and allocated them to the locomotive depot (Bahnbetriebswerk or Bw) in Nuremberg. Later they were all transferred to Kaiserslautern and Landau. The locomotives were retired by 1956.

No examples of the DRG Class 71.0 remain.

References

Hütter, Ingo (2021). Die Dampflokomotiven der Baureihen 60 bis 91 der DRG, DRB, DB, und DR (in German). Werl: DGEG Medien. pp. 68–69. ISBN 978-3-946594-21-5.
Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1978). Dampflokomotiven deutscher Eisenbahnen, Baureihe 60–96 (EFA 1.3) (in German) (4th ed.). Düsseldorf: Alba. pp. 45–48, 230–231. ISBN 3-87094-083-2.