DRG Class 85

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

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 m^2 (38.2 sq ft)
Radiative heating area	15 m^2 (160 sq ft)
Tube heating area	180.31 m^2 (1,940.8 sq ft)
Superheater area	72.50 m^2 (780.4 sq ft)
Evaporative heating area	195.31 m^2 (2,102.3 sq ft)
Water capacity	14 m^3 (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)

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  16.7 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.

External links

• History of the Class 85 in the Höllental, Black Forest