Bavarian S 2/5

The express steam locomotives of Class S 2/ 5 of the Bavarian State Railways were the first to be built in Germany locomotives with full bar frame. Model for this frame type were imported in 1900 by the Bavarian State Railroad from the United States two Baldwin locomotives, which had also received the generic name of S 2/5.

History

Maffei built 1904 ten of the many components consistent with the parallel -developed S 3/5 machines. For example, was abandoned in the interest of using even with the S 3/ 5 to a at the selected Achsordnung possible gewesenen wider firebox, this was only about 90 mm wider than the bar frame of the locomotive. For technical reasons, the side frames were not rolled in one piece, but forged together from several bars. For the first time in Bavaria a driving wheel diameter of 2,000 mm instead of the previously usual Bavarian express locomotives diameter of 1.870 mm was used. The drive was carried out as in the two imported from the USA locomotives by a four-cylinder compound engine. Instead of Vauclain - engine but we chose the more common type in Europe with two inner and two outer cylinders in the type of Borries, so drive with all four cylinders on an axle.

On trial runs, one of the locomotives reached to 135 km / h; in regular operation were 110 km / h top speed. The locomotives were initially based at Bw Munich I and subjected to other such famous trains like the Orient Express and the North-South Express. As with all German Atlantics, however, the tension of the two driven axles for the rising tension loads at the beginning of the 20th century had reached soon no longer sufficient. The S 2/5 was a tensile load of 250 t in the plane at 110 km / h on a slope of five per thousand still move with 85 km / h. The machine was therefore granted not a long period of use, even though they had very good runnability and were considered to be outspoken fast runner.

1910 the locomotives came into the Palatinate network depot in Ludwigshafen and operation workshop in Nuremberg. In 1922 there were only eight S 2/ 5 are available. The German Reichsbahn took over as the class 14.1 or five locomotives with the number 14141-145. These were retired in 1927.

The locomotives were equipped with a tender bay senders of type 2'2 ' T 21.

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