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DRG Class 84

DRG Class 84
Number(s) DRG 84 001–012
Quantity 12
Manufacturer Schwartzkopff 84 001-002 + 84 005**-012**, Orenstein & Koppel 84 003*- 004*
Year(s) of manufacture 1935–1937
Retired 1968
Wheel arrangement 2-10-2
Axle arrangement 1'E1' h3, 1'E1' h2*
Track gauge 1,435 mm (4 ft 8 12 in)
Length over buffers 15,550 mm /15,950 mm*
Service weight 133.6 t
Adhesive weight 91.3 t
Axle load 18.3 t
Top speed 70 km/h / 80 km/h**
Indicated Power 1,426 PSI
Driving wheel diameter 1400 mm
Leading wheel diameter 850 mm
Trailing wheel diameter 850 mm
No. of cylinders 2*, 3
Cylinder bore 500 mm
Piston stroke 660 mm
Boiler Overpressure 16 bar
Grate area 3.76 m2
Superheater area 85.00 m2
Evaporative heating area 210.10 m2
Features 84 003*/84 004* with Luttermöller axles on the outer coupled axles

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.

In the Second World War a large number 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.


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