Bavarian S 2/5
| Bavarian S 2/5 DR class 14.1 |
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|---|---|
 Bavarian S 2/5
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| Numbering: | DR 14 141-145 |
| Number: | 10 |
| Manufacturer: | Maffei |
| Year of construction (s): | 1904 |
| Retirement: | until 1927 |
| Type : | 2'B1 n4v |
| Genre : | S 25.16 |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 19,275 mm |
| Empty mass: | 62.2 t |
| Service mass: | 68.6 t |
| Friction mass: | 32.0 t |
| Wheel set mass : | 16.0 t |
| Top speed: | 110 km / h |
| Driving wheel diameter: | 2,000 mm |
| Impeller diameter front: | 950 mm |
| Rear wheel diameter: | 1,206 mm |
| Control type : | Heusinger |
| Number of cylinders: | 4th |
| HD cylinder diameter: | 340 mm |
| LP cylinder diameter: | 570 mm |
| Piston stroke: | 640 mm |
| Boiler overpressure: | 16 bar |
| Number of heating pipes: | 278 |
| Grate area: | 3.27 m² |
| Radiant heating surface: | 14.5 m² |
| Tubular heating surface: | 191 m² |
| Evaporation heating surface: | 205.5 m² |
| Tender: | bay 2'2 'T 21 |
| Water supply: | 21.0 m³ |
| Fuel supply: | 7 t |
The express train steam locomotives of the type S 2/5 of the Bavarian State Railway were the first locomotives built in Germany with a continuous bar frame . The model for this type of frame was the two Baldwin locomotives imported from the USA by the Bavarian State Railroad in 1900 , which had also received the class designation S 2/5 .
history
In 1904 Maffei built ten of the machines, which had the same many components as the S 3/5 developed in parallel . For example, in the interest of using the S 3/5, a wider fire box, which was possible with the chosen axle arrangement, was dispensed with, it was only around 90 mm wider than the bar frame of the locomotive. For manufacturing reasons, the frame cheeks were not yet rolled from one piece, but rather forged from several bars. For the first time in Bavaria, a drive wheel diameter of 2,000 mm was used instead of the diameter of 1,870 mm that was previously used for express train locomotives in Bavaria. As with the two locomotives imported from the USA, they were powered by a four-cylinder compound engine . Instead of the Vauclain engine, however, the type more common in Europe was chosen with two inner and two outer cylinders of the Borries type , i.e. with all four cylinders driven on one axis.
During test runs, one of the locomotives reached 135 km / h; In regular operation, the maximum speed was 110 km / h. The locomotives were initially located at the Munich I depot and pulled such famous trains as the Orient Express and the North-South Express . As with all German Atlantics , the tractive force of the two driven axles was soon no longer sufficient for the increasing train loads at the beginning of the 20th century. The S 2/5 was able to move a tensile load of 250 t on the plain at 110 km / h and on a gradient of five per thousand at 85 km / h. The machines were therefore not granted a long period of use, although they had very good running properties and were considered to be extremely fast-moving.
In 1910 the locomotives came into the Palatinate network to the Ludwigshafen depot and the Nuremberg workshop . In 1922 only eight S 2/5 were left. The Deutsche Reichsbahn took over five locomotives with the numbers 14 141-145 as class 14.1 . These were retired in 1927.
The locomotives were with a Tender respondents to type bay 2'2 'T 21 equipped.
literature
- Manfred Weisbrod, Hans Müller, Wolfgang Petznick: Steam locomotive archive . Volume 1. transpress VEB Verlag for Transport, Berlin 1976, p. 97 ff., P. 256 f.
