Class D I of the

Royal Bavarian State Railways The Royal Bavarian State Railways (''Königliche Bayerische Staats-Eisenbahnen'' or ''K.Bay.Sts.B.'') was the state railway company for the Kingdom of Bavaria. It was founded in 1844. The organisation grew into the second largest of the German ...

(''Königlich Bayerische Staatsbahn'') was a

tank locomotive A tank locomotive is a steam locomotive which carries its water in one or more on-board water tanks, instead of a more traditional tender (rail), tender. Most tank engines also have Fuel bunker, bunkers (or fuel tanks) to hold fuel; in a #Tender ...

with two

coupled axles On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons (or turbine, in the case of a steam turbine locomotive). On a conventional, non-articulated locomotive, the driving wheels are all coupled tog ...

designed for shunting. As had been specified, these locomotives were simple and robust. They had a double-frame, with water tanks being suspended between the sole bars of the front section. Because the water capacity of 1.74 m³ soon proved too little even for a shunter operating only within the limits of its own station, additional side tanks were added to some engines during the 1880s. The outside

Stephenson valve gear The Stephenson valve gear or Stephenson link or shifting link is a simple design of valve gear that was widely used throughout the world for various kinds of steam engines. It is named after Robert Stephenson but was invented by his employees. ...

moved the valves on top of the horizontal

cylinders A cylinder () has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an infinite ...

. The locomotives could be braked using an Exter counterweight brake. The D I saw shunting duties on small and medium-sized stations, for example in

Schwandorf Schwandorf is a town in the Upper Palatinate in Bavaria, Germany, which is the seat of the Schwandorf (district), Schwandorf district. It lies on the river Naab. Geography Geographical location Schwandorf is located at the intersection of ...

, Straubing or Neumarkt in der Oberpfalz. 13 locomotives were still in service when the Bavarian State Railway transferred to the

Deutsche Reichsbahn The ''Deutsche Reichsbahn'' (), also known as the German National Railway, the German State Railway, German Reich Railway, and the German Imperial Railway, was the Weimar Republic, German national Rail transport, railway system created after th ...

in 1920. Seven vehicles were allocated numbers in the

DRG renumbering plan for steam locomotives In 1922, the Deutsche Reichsbahn began to develop a renumbering plan to standardize the numbering of steam locomotives that had been taken over from the state railways (''Länderbahnen''). Its basis was the corresponding DRG classification system. ...

, but none were implemented as they were retired in 1923.

Sources

* * {{DEFAULTSORT:Bavarian D 01 0-4-0T locomotives D 01 Standard-gauge locomotives of Germany Maffei locomotives Railway locomotives introduced in 1871 B n2t locomotives Shunting locomotives

See also

Sources