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The reference for locomotives and railcars

Bavarian C V

German Reichsbahn class 173

Germany 1896 43 produced
Die Lokomotive, August 1925

The class C V locomotives were among the first express locomotives in Europe to have a 4-6-0 wheel arrangement. They went back to a design that Maffei had created on its own account and were presented in 1896 at the Bavarian State Exhibition. The original design was intended for both passenger and freight trains and therefore had driving wheels with a diameter of only 1,640 mm. The Bavarian State Railways bought this locomotive and put it into service as a test. It was finally decided to purchase it as a pure express locomotive with a driving wheel diameter of 1,870 mm and only in a more powerful version. However, the increase in the size of the wheels was accompanied by a reduction in the tractive effort, so that in normal operation the maximum speed of 90 km/h could only be reached with trains of a maximum of 160 tonnes.

At the request of Anton Hammel, director of Maffei, a bar frame that was still rarely found in Germany was used. While the trend in the north of the country was back towards two-cylinder locomotives with single steam expansion, Hammel ushered in the era of express train locomotives with four-cylinder compound engines in southern Germany with the C V. Here it was thought that the disadvantages of the more maintenance-intensive inside cylinders and cranked axles are more than compensated for by the lower consumption.

Between 1899 and 1901, 42 examples were built, which were pushed into less important services by new locomotives from 1903 onwards. They remained in service longer in their new tasks, but after the First World War a relatively large proportion of 17 locomotives had to be handed over to France as reparations. The remaining locomotives were taken over by the Reichsbahn and became the class 173. This showed that they were still classified as express locomotives. They were retired by 1930.

Technical data

General

Property prototype production
Built 1896 1899-1901
Manufacturers Maffei
Wheel arrangement 4-6-0 (Ten-wheeler)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property prototype production
Length 18.84 m
Wheelbase 8.29 m
Service mass 66.2 t
Adhesion mass 46.2 t
Rigid wheelbase 3.96 m
Axle load 15.4 t
Water capacity 21,500 l
Fuel capacity 7 t (coal)

Boiler

Property prototype production
Grate area 2.65 m²
Evaporative heating surface 153 m²
Total heating surface 153.0 m²

Power plant

Property prototype production
Driver diameter 1,640 mm 1,870 mm
Boiler pressure 14 bar
Expansion type compound
Cylinders four, HP: 380 x 640 mm and LP: 610 x 640 mm

Power

Property prototype production
Power source steam
Indicated power 883 kW (1,201 PS)
Top speed 90 km/h
Starting effort 96.6 kN 84.7 kN
Starting effort simple 115.9 kN 101.7 kN

Calculated values

Property prototype production
Factor of adhesion 1 : 4.69 1 : 5.35
Optimal speed 56 km/h 64 km/h
Power-to-weight ratio 13.3 kW/t
Adhesive weight/Total 1 : 1.43
Tractive force/Heating surface 1 : 13.19 1 : 11.57
Grate area/Heating surface 1 : 57.74
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