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The reference for locomotives and railcars

Baden VIII c

Germany 1893 32 produced
No. 632 on a builder's photo of Esslingen machine factory PD

When a powerful freight locomotive was being searched that could still negotiate curves on the Black Forest Railway, Grafenstaden had the class VIII c designed after the Mallet design. Only two pre-production locomotives were manufactured there, the production of all others was taken over by MBG Karlsruhe and Maschinenfabrik Esslingen.

Although the ability to negotiate curves was good, the rear axles, which were fixed in the frame, could hardly offer sufficient directional stability for the front bogie that could be shifted laterally due to their short wheel base. In addition to the tendency to slip, which was already a problem in Mallet locomotives, the running smoothness was insufficient. Furthermore, due to the special construction of the running gear, the boiler was somewhat smaller than in comparable standard-design locomotives, which meant that the locomotives did not achieve the power of the classes VIII a and VIII b despite their greater weight.

Nevertheless, series production was ordered, and so twelve locomotives were built in Karlsruhe in 1895 and another 18 in Esslingen in 1899/1900. After the war, eight came to France and one to Belgium. The locomotives remaining in Germany were retired by 1925, which is why they were not renumbered to class 5561.

Technical data

General

Property pilot series series
Built 1893 1895, 1899-19000
Manufacturers Grafenstaden MBG Karlsruhe, Esslingen
Wheel arrangement 0-4-4-0
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property pilot series series
Length 16.76 m
Wheelbase 5.80 m
Empty mass 51.6 t
Service mass 57.8 t
Adhesion mass 57.8 t
Total mass 92.1 t
Rigid wheelbase 1.75 m
Axle load 14.5 t
Water capacity 13,500 l 14,000 l
Fuel capacity 4 t (coal)

Boiler

Property pilot series series
Grate area 1.96 m² 1.93 m²
Firebox surface 10.38 m² 9.66 m²
Tube heating surface 125.23 m²
Evaporative heating surface 135.61 m² 134.89 m²
Total heating surface 135.6 m² 134.9 m²

Power plant

Property pilot series series
Driver diameter 1,260 mm
Boiler pressure 12 bar 13 bar
Expansion type compound
Cylinders two, HP: 390 x 600 mm and LP: 600 x 600 mm

Power

Property pilot series series
Power source steam
Estimated power 500 kW (680 PS) 525 kW (714 PS)
Top speed 45 km/h
Starting effort 51.9 kN 56.3 kN
Starting effort simple 62.3 kN 67.5 kN

Calculated values

Property pilot series series
Factor of adhesion 1 : 10.92 1 : 10.08
Optimal speed 60 km/h 56 km/h
Power-to-weight ratio 8.7 kW/t 9.1 kW/t
Heating Surface Equivalent 187.5 m² 183.2 m²
Cylinder volume/HSE 1 : 834.61 1 : 854.30
Adhesive weight/Total 1 : 1.00
Tractive force/Heating surface 1 : 8.00 1 : 8.71
Grate area/Heating surface 1 : 69.19 1 : 69.89
Firebox/Tube surface 1 : 12.06 1 : 12.96
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