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Bavarian C V
German Reichsbahn class 173
Germany | 1896 | 43 produced
Die Lokomotive, August 1925

The class C V machines were 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 presented in 1896 at the Bavarian State Exhibition. The original design was intended for both passenger and freight trains and therefore had coupled 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 coupled wheel diameter of 1,870 mm and only in a reinforced 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 used 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. The thinking prevailed here that the disadvantages of the more maintenance-intensive inner 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 lower-level services by new locomotives from 1903 onwards. They remained in service longer in their new working area, 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.

Variantprototypeproduction
General
Built18961899-1901
ManufacturerMaffei
Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length61 ft 9 3/4 in
Wheelbase27 ft 2 3/8 in
Fixed wheelbase12 ft 11 7/8 in
Service weight145,946 lbs
Adhesive weight101,853 lbs
Axle load33,951 lbs
Water capacity5,680 us gal
Fuel capacity15,432 lbs (coal)
Power
Power sourcesteam
Indicated power1,184 hp (883 kW)
Optimal speed35 mph40 mph
Top speed56 mph
Starting effort21,727 lbf19,055 lbf
with start valve26,072 lbf22,866 lbf
Power Plant
Driver diameter64.6 in73.6 in
Boiler pressure203 psi
Expansion typecompound
Cylindersfour, HP: 14 15/16 x 25 3/16 in
and LP: 24 x 25 3/16 in
Boiler
Grate area28.5 sq ft
Evaporative heating area1,646.9 sq ft
Total heating area1,646.9 sq ft
Calculated Values
steam locomotive
express
Anton Hammel
last changed: 04/2022
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