German Reichsbahn class 8310
The 8310 was one of the less successful types of the new-built steam locomotives of the Reichsbahn in the GDR. It was designed together with the heavier 6510, but was not convincing in contrast to this. Both had the wheel arrangement 2-8-4T, but in contrast to its sister, the 8310 was designed for branch lines with an axle load of 15 instead of 17.5 tonnes. This meant a smaller driver diameter, and therefore a lower top speed and less power. As with the 6510, a plate frame was used here.
Already during the testing of the first two locomotives, some defects became known, but due to the circumstance that series production had already started, these could only be partially remedied by subsequent repairs. Above all, the use of the low-energy lignite required some structural adjustments, which were already implemented before the completion of extensive tests and ultimately turned out to be immature. Since the imminent use of diesel locomotives became apparent as early as the 1950s, only 27 of the class 8310 were made. Although the Reichsbahn had a large number of steam locomotives in regular service well into the 1980s, the last locomotive of this class was retired in 1974.
Technical data
General
- Built
- 1955-1956
- Manufacturers
- LKM Babelsberg
- Wheel arrangement
- 2-8-4T (Berkshire)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 15.00 m
- Wheelbase
- 11.10 m
- Empty mass
- 70.9 t
- Service mass
- 99.8 t
- Adhesion mass
- 59.5 t
- Rigid wheelbase
- 4.50 m
- Axle load
- 15 t
- Water capacity
- 14,000 l
- Fuel capacity
- 8 t (coal)
Boiler
- Grate area
- 2.5 m²
- Firebox surface
- 12.16 m²
- Tube heating surface
- 94.02 m²
- Evaporative heating surface
- 106.18 m²
- Superheater surface
- 39.25 m²
- Total heating surface
- 145.4 m²
Power plant
- Driver diameter
- 1,250 mm
- Boiler pressure
- 14 bar
- Expansion type
- simple expansion
- Cylinders
- two, 500 x 660 mm
Power
- Power source
- steam
- Indicated power
- 794 kW (1,080 PS)
- Top speed
- 60 km/h
- Starting effort
- 157.1 kN
Calculated values
- Factor of adhesion
- 1 : 3.72
- Optimal speed
- 31 km/h
- Power-to-weight ratio
- 8.0 kW/t
- Heating Surface Equivalent
- 245.5 m²
- Cylinder volume/HSE
- 1 : 1,055.81
- Adhesive weight/Total
- 1 : 1.68
- Tractive force/Heating surface
- 1 : 22.56
- Grate area/Heating surface
- 1 : 58.17
- Firebox/Tube surface
- 1 : 7.73
- Total/Superheater
- 1 : 2.71