| Bavarian S 3/5 N DRG Class 17.4 |
|
|---|---|
| Number(s): | Bavarian 3301-3328, 3330-3340 DRG 17 401–420 |
| Quantity: | 39 |
| Manufacturer: | Maffei |
| Year(s) of manufacture: | 1903–1907 |
| Retired: | 1928ff. |
| Wheel arrangement: | 4-6-0 |
| Axle arrangement: | 2'C n4v |
| Gauge: | 1,435 mm |
| Length over buffers: | 19,325 mm |
| Service weight: | 69.8 t |
| Adhesive weight: | 45.0 t |
| Axle load: | 15.0 t |
| Top speed: | 110 km/h |
| Indicated Power: | 810 kW |
| Driving wheel diameter: | 1,870 mm |
| Leading wheel diameter: | 950 mm |
| No. of cylinders: | 4 |
| LP cylinder bore: | 570 mm |
| HP cylinder bore: | 335 mm (1st series) 340 mm (2nd/3rd series) |
| Piston stroke: | 640 mm |
| Boiler Overpressure: | 14 bar (1st series) 16 bar (2nd/3rd series) |
| Grate area: | 3.27 m² |
| Evaporative heating area: | 164.43 m² |
| Tender: | bay 2'2' T 21/21.8 |
| Water capacity: | 21.0/21.8 m³ |
The Class S 3/5 engines of the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn) were express train steam locomotives with a 4-6-0 wheel arrangement.
Contents |
Between 1903 and 1907 Maffei delivered three batches of 39 locomotives in all. They had a four-cylinder, saturated steam compound engine. Unlike their forerunners, the Bavarian Class C V, the inside high-pressure cylinders and the outside low-pressure cylinders were angled and worked on the first coupled axle.
From the second series, built in 1904, the boiler pressure of the S 3/5 was raised from 14 to 16 bar. The tube lengths and diameter of the inside cylinders were also changed.
The S 3/5 engines built from 1904 were technically closely related to the S 2/5 which was being developed in parallel. The two classes only differed in their wheel arrangement and the larger coupled wheel diameter on the S 2/5; the boiler and running gear were the same and thus also their output power. Even the permitted top speed was identical on both classes (110 km/h). The S 3/5 N engines were, in terms of tractive effort (300 tons at 100 km/h), clearly superior to the S 2/5, because they had three driven axles. S 3/5 locomotives were stabled in the locomotive workshops at Munich I and Nuremberg.
The locomotives were coupled with Bavarian 2'2' T 21 and 2'2' T 21,8 tenders.
| Bavarian S 3/5 H DRG Class 17.5 |
|
|---|---|
| Number(s): | Bavarian 3329, 3341-3369 DRG 17 501–524 |
| Quantity: | 30 |
| Manufacturer: | Maffei |
| Year(s) of manufacture: | 1906–1911 |
| Retired: | by 1948 |
| Wheel arrangement: | 4-6-0 |
| Axle arrangement: | 2'C h4v |
| Service weight: | 71.9 t |
| Adhesive weight: | 48.0 t |
| Axle load: | 16.0 t |
| Indicated Power: | 925 kW |
| LP cylinder bore: | 590 mm |
| HP cylinder bore: | 360 mm |
| Superheater area: | 33.90 m² |
| data shown where different | |
For the 1906 Bavarian State Exhibition in Nuremberg, Maffei fitted locomotive no. 3329 experimentally with a Schmidt superheater. In addition the bore of the cylinders was increased to 360/590 mm. These measures produced a significant improvement in locomotive performance (450 tonnes on the level at 100 km/h), so that from 1908 the Bavarian state railways only ordered the superheated S 3/5 H.
Although the more powerful S 3/6 express locomotive had been available since 1908, the number of S 3/5 H engines had climbed to 30 by 1911, partly because there was insufficient funding for the expensive S 3/6. As a result the overall number of S 3/5 engines was 69.
After World War I, 19 saturated steam and 6 superheated steam locomotives had to be transferred abroad. Seventeen of those went to the French Eastern Railway, five to the AL and two to the Belgian state railway. Locomotive no. 3333 was left in Poland after the war and was numered by the PKP as Ok 103-1.
The Deutsche Reichsbahn took over the remaining 20 saturate steam engines as Class 17.4 (17 401–420) and had them converted to superheated locomotives in 1925. The remaining 24 superheated engines became Class 17.5 (17 501–524). In the meantime the S 3/5 was mainly used on passenger train duties in the Reichsbahndirektionen of Augsburg and Nuremberg, because enough modern express engines were now available.
The Reichsbahn began to retire the locomotives as early as 1932. Initially the older, former saturated steam engines disappeared, only eight examples remaining after the Second World War; whilst at the same time 21 of the former S 3/5 H locomotives were still working. All the engines were in Bavaria by the end of the war, but were heavily worn out and no longer ran in regular service. Both variants were finally retired by 1948.
|
|||||||||||||||||||||||||||||||