DRG Class 84
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 | |
|---|---|
| Number(s) | DRG 84 001 – 84 012 |
| Quantity | 12 |
| Manufacturer |
|
| Year(s) of manufacture | 1935–1937 |
| Retired | 1968 |
| Wheel arrangement | 2-10-2T |
| Axle arrangement |
|
| Type | Gt 57.18 |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Length over buffers |
|
| Minimum curve | 100 m (330 ft) |
| Empty weight | 100.5 tonnes (98.9 long tons; 110.8 short tons) |
| Service weight | 125.5 tonnes (123.5 long tons; 138.3 short tons) |
| Adhesive weight | 91.3 tonnes (89.9 long tons; 100.6 short tons) |
| Axle load | 18.3 tonnes (18.0 long tons; 20.2 short tons) |
| Top speed |
|
| Indicated Power | 1,426 PS (1,050 kW; 1,410 hp) |
| 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) |
| Valve gear | Heusinger (Walschaerts) |
| No. of cylinders |
|
| Cylinder bore |
|
| Piston stroke | 660 mm (26 in) |
| Boiler Overpressure | 16 bar (1.60 MPa; 232 psi) |
| No. of heating tubes | 158 |
| No. of smoke tubes | 48 |
| Grate area | 3.76 m2 (40.5 sq ft) |
| Superheater area | 85.00 m2 (914.9 sq ft) |
| Evaporative heating area | 210.10 m2 (2,261.5 sq ft) |
| Water capacity | 14 m3 (490 cu ft) or 14,000 litres (3,100 imp gal; 3,700 US gal) |
| Fuel | Coal: 3 tonnes (3.0 long tons; 3.3 short tons) |
| Features | 84 003–004† with Luttermöller axles on the outer coupled axles |
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.
External links
- Einheitslok Baureihe 84 Müglitztalbahn