DRG Class 85

DRG Class 85
Number(s) DRG 85 001 – 85 010
Quantity 10
Manufacturer Henschel & Sohn
Year(s) of manufacture 1932–1933
Retired 1961
Wheel arrangement 2-10-2T
Axle arrangement 1′E1′ h3t
Track gauge 1,435 mm (4 ft 8 1⁄2 in)
Length over buffers 16,300 mm (53 ft 5 3⁄4 in)
Height 4,550 mm (14 ft 11 1⁄8 in)
Width 3,050 mm (10 ft 1⁄16 in)
Empty weight 107.5 tonnes (105.8 long tons; 118.5 short tons)
Service weight 133.6 tonnes (131.5 long tons; 147.3 short tons)
Adhesive weight 99.7 tonnes (98.1 long tons; 109.9 short tons)
Axle load 20.1 tonnes (19.8 long tons; 22.2 short tons)
Top speed 80 km/h (50 mph)
Indicated Power 1,103 kW (1,500 PS; 1,480 hp)
Starting tractive effort 280 kN (62,900 lbf)
Driving wheel diameter 1,400 mm (4 ft 7 1⁄8 in)
Leading wheel diameter 850 mm (2 ft 9 1⁄2 in)
Trailing wheel diameter 850 mm (2 ft 9 1⁄2 in)
No. of cylinders 3
Cylinder bore 600 mm (23 5⁄8 in)
Piston stroke 660 mm (26 in)
Boiler Overpressure 14 bar (1.4 MPa; 200 psi)
No. of heating tubes 155
No. of smoke tubes 41
Heating tube length 4,700 mm (15 ft 5 in)
Grate area 3.55 m2 (38.2 sq ft)
Radiative heating area 15 m2 (160 sq ft)
Tube heating area 180.31 m2 (1,940.8 sq ft)
Superheater area 72.50 m2 (780.4 sq ft)
Evaporative heating area 195.31 m2 (2,102.3 sq ft)
Water capacity 14 m3 (490 cu ft) or 14,000 litres (3,100 imp gal; 3,700 US gal)
Fuel Coal: 4.5 tonnes (4.4 long tons; 5.0 short tons)

The Class 85 was a German goods train tank engine and standard locomotive (Einheitslok) with the Deutsche Reichsbahn.

History

In 1931, the DRG ordered ten locomotives from the firm of Henschel that were taken into the fleet as numbers 85 001 to 85 010. The Class 85 was intended for hauling passenger and goods trains. They were however also employed as pusher locomotives on the Höllentalbahn in the Black Forest. Thanks to this engine, the Höllental Railway could do away with rack railway operations from 1933. The running gear and the superheated system were taken from the Class 44. The boiler, with a few minor alterations, was the same as that of the Class 62. All the locomotives were stabled at the Freiburg shed. Apart from number 85 004, which was lost in the Second World War, all the engines were in operation in the Black Forest until 1961, the year the route was converted from experimental electrical operations with 20 kV/50 Hz lines to the usual Deutsche Bundesbahn standard of 15 kV ​16 2⁄3 Hz AC. One engine, number 85 007, was still in service in Wuppertal until the end of the year, but they were all retired by the beginning of the next year.

Preserved locomotives

Number 85 007 belongs to the town of Freiburg im Breisgau. It is not operational, but is maintained by the Bahn-Sozialwerk-Gruppe. The engine is housed in the former locomotive shed.

Literature

  • Scharf, Hans; Wollny, Burkhard (1987). Die Höllentalbahn (in German). Freiburg: EK Verlag. ISBN 3-88255-780-X.
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