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Württemberg A
German Reichsbahn class 348158
Germany | 1878 | 25 produced
The “Elberfeld” in the version from 1886
The “Elberfeld” in the version from 1886
Bernd Beck: „Schwäbische Eisenbahn. Bilder von der Königlich Württembergischen Staatseisenbahn”

Although the express locomotives with 4-4-0 wheel arrangement known from America had become increasingly widespread in Central Europe, the Württemberg Railways wanted to return to cheaper locomotives with a 2-4-0 wheel arrangement at an early stage. In addition to some conversions from 4-4-0 locomotives, the class A was also produced, which was manufactured from 1878.

An important point in the cost savings was the chassis, the three axles of which were all fixed in the frame. A relatively small driving wheel diameter of just 1,650 mm made it possible to achieve a wheelbase of just four metres. It was thus possible to achieve good curve negotiation even without a movably mounted leading axle. The locomotives were recognizable by a very large steam dome and a firebox that was higher than the boiler barrel. In the first series of ten engines from 1878, the boiler pressure was ten bar, in the 15 pieces built later this was raised to twelve bar. The latter also received cylinders with a slightly increased diameter.

With a maximum speed of 80 km/h, the locomotives were able to assert themselves in express train service for a long time, but the small wheels and short wheelbase became a disadvantage at the latest when new express train locomotives were put into service. They were later reclassified as class Aa, but around the turn of the century, after being fitted with a new boiler with 14 bar pressure, they were given the designation A again. They were last used in regular passenger service, but the last two locomotives were even able to hold their own until 1925. They were taken over by the Reichsbahn as road numbers 34 8101 and 34 8102, but were retired in the same year.

Variant1878 variant1886 variant
General
Built1878-18861886-1891
ManufacturerEsslingen
Axle config2-4-0 (Porter) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length46 ft 4 11/16 in
Wheelbase13 ft 1 1/2 in
Fixed wheelbase13 ft 1 1/2 in
Service weight75,288 lbs80,072 lbs
Adhesive weight52,249 lbs55,556 lbs
Axle load27,778 lbs26,125 lbs
Water capacity2,642 us gal
Fuel capacity11,023 lbs (coal)
Power
Power sourcesteam
Estimated power402 hp (300 kW)469 hp (350 kW)
Optimal speed24 mph22 mph
Top speed50 mph
Starting effort10,899 lbf13,724 lbf
Power Plant
Driver diameter65 in
Boiler pressure145 psi174 psi
Expansion typesimple
Cylinderstwo, 16 1/8 x 22 1/16 intwo, 16 9/16 x 22 1/16 in
Boiler
Grate area15.1 sq ft17.2 sq ft
Evaporative heating area1,210.3 sq ft1,183.6 sq ft
Total heating area1,210.3 sq ft1,183.6 sq ft
Calculated Values
steam locomotive
express
Adolf Klose
last changed: 01/2022
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