Baden VIII a
Germany 1875 12 produced
When the six-coupled locomotives on the Black Forest and the Odenwald lines with gradients of 1.25 percent became too weak, Hanomag delivered twelve eight-coupled locomotives in 1875. The axles were put as closely together as possible, but the desired rigid wheelbase of 2.5 metres needed for the sharp curves could not be realized. So the first and last driving axles were built with 12.5 mm of lateral play, what had a negative impact on the running characteristics. Later, the Baden State Railway bought type VIII c Mallet locomotives for mountain lines with sharp curves. So the number of the VIII a remained at twelve, which were withdrawn by 1923.
Technical data
General
- Built
- 1875
- Manufacturers
- Hanomag
- Wheel arrangement
- 0-8-0 (Eight-coupled)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 15.68 m
- Wheelbase
- 2.92 m
- Total wheelbase
- 10.16 m
- Empty mass
- 45.6 t
- Service mass
- 52.4 t
- Adhesion mass
- 52.4 t
- Axle load
- 12.9 t
- Water capacity
- 11,500 l
- Fuel capacity
- 4 t (coal)
Boiler
- Grate area
- 2 m²
- Firebox surface
- 8.2 m²
- Tube heating surface
- 173.3 m²
- Evaporative heating surface
- 181.5 m²
- Total heating surface
- 181.5 m²
Power plant
- Driver diameter
- 1,220 mm
- Boiler pressure
- 9 bar
- Expansion type
- simple expansion
- Cylinders
- two, 530 x 635 mm
Power
- Power source
- steam
- Estimated power
- 450 kW (612 PS)
- Top speed
- 45 km/h
- Starting effort
- 111.8 kN
Calculated values
- Factor of adhesion
- 1 : 4.60
- Optimal speed
- 24 km/h
- Power-to-weight ratio
- 8.6 kW/t
- Heating Surface Equivalent
- 222.5 m²
- Cylinder volume/HSE
- 1 : 1,259.26
- Adhesive weight/Total
- 1 : 1.00
- Tractive force/Heating surface
- 1 : 12.87
- Grate area/Heating surface
- 1 : 90.75
- Firebox/Tube surface
- 1 : 21.13