DRG Class 71.0

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.

DRG Class 71.0
Type and origin
BuilderSchwartzkopff, Borsig, Krupp
Build date1934–1936
Total produced6
Specifications
Configuration:
​
 • Whyte2-4-2T
 • GermanPt 24.15
Gauge1,435 mm (4 ft 8+1⁄2 in)
Leading dia.850 mm (2 ft 9+1⁄2 in)
Driver dia.1,600 mm (63 in)
Trailing dia.850 mm (2 ft 9+1⁄2 in)
Wheelbase:
 • Overall		8,400 mm (27 ft 6+3⁄4 in)
Length:
​
 • Over beams11,800 mm (38 ft 8+1⁄2 in)
Height4,165 mm (13 ft 8 in)
Axle load15.0 t (14.8 long tons; 16.5 short tons)
Adhesive weight30.0 t (29.5 long tons; 33.1 short tons)
Service weight58.6 t (57.7 long tons; 64.6 short tons)
Boiler:
​
No. of heating tubes70
No. of smoke tubes26
Heating tube length3,500 mm (11 ft 5+3⁄4 in)
Boiler pressure20 bar (2.00 MPa; 290 psi)
Heating surface:
 • Firebox		1.38 m2 (14.9 sq ft)
 • Evaporative67.74 m2 (729.1 sq ft)
Superheater:
​
 • Heating area28.60 m2 (307.8 sq ft)
Cylinders2
Cylinder size330 mm (13 in)
Piston stroke660 mm (26 in)
Valve gearWalschaerts (Heusinger)
Performance figures
Maximum speed90 km/h (56 mph)
Indicated power419 kW (570 PS; 562 hp)
Career
NumbersDRG 71 001–006
Retired1956

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.

See also

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. ISBN 3-87094-083-2.
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