DRG Class 84

Summary

The German DRG Class 84s were standard (see Einheitsdampflokomotive) goods train tank locomotives with the Deutsche Reichsbahn. A total of twelve engines were placed into service by the Reichsbahn between 1935 and 1937. The machines were given operating numbers 84 001–012. They were worked on the Müglitz Valley Railway (Müglitztalbahn) between Heidenau and Altenberg in the Ore Mountains (Erzgebirge), for which they were specially designed to negotiate tight curves. They were manufactured by the firms of Schwartzkopff and Orenstein & Koppel. One feature was that they were fitted with Schwartzkopff-Eckhardt II bogies.

DRG Class 84
Type and origin
Builder
Build date1935–1937
Total produced12
Specifications
Configuration:
 • Whyte2-10-2T
 • GermanGt 57.18
Gauge1,435 mm (4 ft 8+12 in)
Leading dia.850 mm (2 ft 9+12 in)
Driver dia.1,400 mm (4 ft 7+18 in)
Trailing dia.850 mm (2 ft 9+12 in)
Minimum curve100 m (330 ft)
Length:
 • Over beams
  • 15,550 mm (51 ft 14 in)
  • 15,950 mm (52 ft 4 in) †
Axle load18.3 tonnes (18.0 long tons; 20.2 short tons)
Adhesive weight91.3 tonnes (89.9 long tons; 100.6 short tons)
Empty weight100.5 tonnes (98.9 long tons; 110.8 short tons)
Service weight125.5 tonnes (123.5 long tons; 138.3 short tons)
Fuel capacityCoal: 3 tonnes (3.0 long tons; 3.3 short tons)
Water cap.14 m3 (490 cu ft) or 14,000 litres (3,100 imp gal; 3,700 US gal)
Boiler:
No. of heating tubes158
No. of smoke tubes48
Boiler pressure16 bar (1.60 MPa; 232 psi)
Heating surface:
 • Firebox3.76 m2 (40.5 sq ft)
 • Evaporative210.10 m2 (2,261.5 sq ft)
Superheater:
 • Heating area85.00 m2 (914.9 sq ft)
Cylinders
  • Three
  • Two †
Cylinder size
  • 480 mm (18+78 in)
  • 600 mm (23+58 in) †
  • 500 mm (19+1116 in) ‡
Piston stroke660 mm (26 in)
Valve gearHeusinger (Walschaerts)
Performance figures
Maximum speed
  • 70 km/h (43 mph)
  • 80 km/h (50 mph) ‡
Indicated power1,426 PS (1,050 kW; 1,410 hp)
Career
NumbersDRG 84 001 – 84 012
Retired1968

In the Second World War many of the engines were damaged and had to be sidelined as a result. The vehicles were taken over by the DR in East Germany after the war. The engines were mainly used between Schwarzenberg and Johanngeorgenstadt.

Between 1966 and 1968 all the Class 84 engines were retired apart from one. None, however, has survived.

See also edit

References edit

  • Hütter, Ingo (2021). Die Dampflokomotiven der Baureihen 60 bis 91 der DRG, DRB, DB, und DR (in German). Werl: DGEG Medien. pp. 262–265. 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. 109–113. ISBN 3-87094-083-2.

External links edit

  • Einheitslok Baureihe 84 Müglitztalbahn