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Bavarian S 3/5
German Reichsbahn class 174-5
Germany | 1903 | 69 produced
Die Lokomotive, October 1904

In addition to the S 2/5, the S 3/5 was procured as an express locomotive with a 4-6-0 wheel arrangement. Both were technically very closely related, but the S 3/5 with its three coupled axles was intended more for heavy express trains and routes with gradients of one percent. Both locomotives were almost identical in terms of boiler and engine, which resulted in roughly the same power output. In the first locomotives delivered, the boiler pressure was 14 bars, but it was increased to 16 bars from the following year and thus reached the same value as its sister, which was only manufactured from 1904.

Both locomotives are characterized by the use of a bar frame. On the S 3/5, the diameter of the coupling wheels was 130 mm smaller, resulting in a slightly lower boiler. The result of this different design was that the locomotive developed a higher adhesive weight and greater tractive effort, but was somewhat less suitable for sustained running at the top speed range.

In 1906, a test locomotive was fitted with a superheater and the diameter of the cylinders was increased slightly. This measure enabled the power to be increased by around 170 hp, which meant that trains weighing up to 450 tonnes could be pulled at 100 km/h instead of just 300 tonnes at the same speed as before. Based on this experience, production was switched over in 1907 and only the superheated variant was built. The latter was designated the S 3/5 H, while the original variant later became the S 3/5 N. As a result, between 1903 and 1911, a total of 39 saturated engines and 30 superheated ones were manufactured.

Schematic drawing with dimensions
Schematic drawing with dimensions
Die Lokomotive, October 1904

After some machines had to be handed over after the First World War, the Reichsbahn took on 20 saturated engines as class 174 and 24 superheated engines as class 175. Since the newer S 3/6 was very expensive to purchase, the machines from the older series were also completely converted to superheated steam in the years that followed. Despite these conversions, this variant began to be phased out as early as 1932. After the war, all the remaining locomotives were on Bavarian territory, but they were all badly worn and were therefore completely phased out by 1948.

VariantS 3/5 N 1st seriesS 3/5 N 2nd/3rd seriesS 3/5 H
General
Built19031904-19071906-1911
ManufacturerMaffei
Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length63 ft 4 13/16 in
Length loco38 ft 7 3/4 in
Wheelbase29 ft 0 7/16 in
Fixed wheelbase14 ft 9 3/16 in
Total wheelbase54 ft 9 15/16 in
Empty weight138,230 lbs143,300 lbs
Service weight153,882 lbs154,103 lbs157,630 lbs
Adhesive weight99,208 lbs101,413 lbs105,822 lbs
Axle load33,069 lbs33,841 lbs35,274 lbs
Water capacity5,548 us gal5,759 us gal
Fuel capacity15,432 lbs (coal)17,637 lbs (coal)
Power
Power sourcesteam
Indicated power1,086 hp (810 kW)1,240 hp (925 kW)
Estimated power952 hp (710 kW)
Optimal speed40 mph39 mph40 mph
Top speed68 mph
Starting effort15,278 lbf17,847 lbf19,767 lbf
with start valve18,334 lbf21,416 lbf23,720 lbf
Power Plant
Driver diameter73.6 in
Boiler pressure203 psi232 psi
Expansion typecompound
Cylindersfour, HP: 13 3/16 x 25 3/16 in
and LP: 22 7/16 x 25 3/16 in
four, HP: 13 3/8 x 25 3/16 in
and LP: 22 7/16 x 25 3/16 in
four, HP: 14 3/16 x 25 3/16 in
and LP: 23 1/4 x 25 3/16 in
Boiler
Grate area35.3 sq ft34.7 sq ft
Firebox area156.1 sq ft
Tube heating area2,055.9 sq ft1,603.8 sq ft
Evaporative heating area2,212 sq ft1,759.9 sq ft
Superheater area371.4 sq ft
Total heating area2,212 sq ft2,131.3 sq ft
Calculated Values
steam locomotive
express
Von Borries compound
Anton Hammel
last changed: 01/2022
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