Prussian S 9

The genus S 9 of the Prussian state railways was an express train steam locomotive with the wheel arrangement 2'B1 ' ( "Atlantic" ) and a four-cylinder compound steam engine. It was developed by Hanomag in Hanover and delivered as of the year 1908 with a total number of 99 copies.

However, also known as S 9 Prussian fast travel experimental locomotives do not belong to this series.

Although at this point the hot steam technology was widespread, did not even get wet steam locomotives delivered the land of Prussia Hanomag. The locomotives had procured a very powerful boiler and 4 m², the largest area of ​​all rust Prussian steam locomotives. However, the amount of vapor generated was greater than could process the high-pressure cylinder. The performance of the S 9 therefore hardly exceeded that of the much smaller steam locomotive S 6 S 9 nevertheless initially formed the backbone of express train service between Berlin and Hanover. Like all German Atlantic locomotives, the S 9 quickly proved to be too weak for the increasingly heavy trains.

Two locomotives (Hannover 903 and 905) were 1913 and 1914 equipped with steam boilers and denoted as S 8.

After 1919, 17 locomotives in Belgium and four in France had to be delivered. Only three of the locomotives, including the two S 8 and a wet steam engine were still taken over by the Deutsche Reichsbahn as Class 14.0. The two S 8 were given the numbers 14 001 and 14 002; S 9 ( Food 907) the number 14 031 As early as 1926 the locomotives were retired.