DRG Class 71.0 Type and origin Power type Steam Builder Build date 1934–1936 Total produced 6
Specifications Configuration: • Whyte 2-4-2 T • UIC 1′B1′ h2t • German Pt 24.15 Gauge 1,435 mm (4 ft 8+ 1 ⁄2 in )Leading dia. 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. 9+ 1 ⁄2 in)Wheelbase : • Axle spacing 10+ 1 ⁄4 in) +10+ 1 ⁄8 in) +10+ 1 ⁄4 in) = • Engine 6+ 3 ⁄4 in)Length: • Over headstocks 5+ 3 ⁄8 in) • Over buffers 8+ 5 ⁄8 in)Height 4,165 mm (13 ft 8 in) Axle load 15.0 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 type Coal Fuel 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: • Pitch 6+ 1 ⁄8 in) • Tube plates 5+ 3 ⁄4 in) • Small tubes 1+ 3 ⁄4 in), 70 off • Large tubes 4+ 5 ⁄8 in), 26 offBoiler pressure 20 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) • Tubes 30.4 m2 (327 sq ft) • Flues 31.5 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 area 28.6 m2 (308 sq ft) Cylinders Two, outside Cylinder size 001–002: 12+ 3 ⁄16 in × 26 in)003–006: 330 mm × 660 mm (13 in × 26 in)Valve gear Heusinger (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 Numbers 71 001 – 71 006 Retired 1955–1956
The German DRG Class 71.0 was a 2-4-2 T Deutsche Reichsbahn , which was intended as a replacement for railbuses . Originally it had been planned for these standard engines (Einheitsloks
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.
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