Bavarian D XI
The Bavarian Class D XI engines were branch line (Lokalbahn) saturated steam locomotives built for service with the Royal Bavarian State Railways
Royal Bavarian State Railways
As a nation-state, Germany did not come into being until the creation of the German Empire in 1871 from the various German-speaking states such as Prussia, Bavaria, Saxony, Baden and Württemberg. By then each of the major states had formed its own state railway and these continued to remain...

 (Königlich Bayerische Staatsbahn).

The state railway procured 139 examples between 1895 and 1912; it was the most numerous Bavarian branch line
Branch line
A branch line is a secondary railway line which branches off a more important through route, usually a main line. A very short branch line may be called a spur line...

 locomotive. Both Krauss and Maffei supplied three prototypes each and both were later involved in the production batches.

Eight locomotives of the same type were supplied by Krauss in 1900 to the Lokalbahn AG
Lokalbahn AG
The Lokalbahn AG company , or 'LAG' for short, was a private company based in Munich, Bavaria, whose lines of business was the construction and operation of branch lines in Germany and Austria-Hungary...

 (Lokalbahn Aktien-Gesellschaft or LAG), which later sold them to the Bavarian state railway, where they were given the numbers 2507 to 2512. A further three locomotives were supplied by Krauss to the South German Electric Branch Lines (AG Süddeutsche elektrische Lokalbahnen) that was taken over in 1904 by the LAG; again these locomotives were sold to the state railway. They were given the numbers 2764–2764. These machines were designated as Class PtL 3/4 under the new classification scheme, but did not differ significantly from the newer Class D XI engines. Another five PtL 3/4 were procured by the state railway in 1914 and given the numbers 2783–2787.

Three of these locomotives were also produced for the Palatinate Railway
Palatinate Railway
The Palatinate Railway or Pfalzbahn was an early German railway company in the period of the German Empire prior to the First World War. It was formed on 1 January 1870, as the United Palatinate Railway based in Ludwigshafen, by the amalgamation of the following railway companies:*The Palatine...

 (Pfalzbahn) as the T 4.II
Palatine T 4.II
The Palatine T 4II was a class of saturated steam, tank locomotives operated by the Palatinate Railway.They were to a large extent identical to the Class D XI from Bavaria, but the grate area and diameters of the carrying and coupled wheels were smaller. The rear coupled axle was housed in a...

, but these had different dimensions, including smaller driving
Driving wheel
On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons...

 and carrying wheels
Carrying wheels
The carrying wheels on a steam locomotive are those wheels that are not driven, i.e. they are uncoupled and run freely, unlike coupled or driving wheels. They are also described as running wheels and their axle may be called a carrying axle. Carrying wheels are referred to as leading wheels if they...


The Deutsche Reichsbahn
Deutsche Reichsbahn
Deutsche Reichsbahn was the name of the following two companies:* Deutsche Reichsbahn, the German Imperial Railways during the Weimar Republic, the Third Reich and the immediate aftermath...

 took over all 147 vehicles in 1925 as the DRG Class 98.4-5. The D XI engines were given the numbers 98 411–556 and the PtL 3/4 machines the numbers 98 561–568. About half the locomotives were retired between 1931 and 1933.

Two machines remained after the Second World War in Czechoslovakia
Czechoslovakia or Czecho-Slovakia was a sovereign state in Central Europe which existed from October 1918, when it declared its independence from the Austro-Hungarian Empire, until 1992...

 and four in Austria
Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...

. The last were numbers 98 500, 514, 546 und 549, which were given the numbers 791.01–04 by the Austrian Federal Railway (Österreichische Bundesbahn or ÖBB). They were taken out of service in 1957.

The Deutsche Bundesbahn
Deutsche Bundesbahn
The Deutsche Bundesbahn or DB was formed as the state railway of the newly established Federal Republic of Germany on September 7, 1949 as a successor of the Deutsche Reichsbahn-Gesellschaft '...

 took over 56 engines in 1945. The last loco was taken out of service in 1960 in Nuremberg
Nuremberg[p] is a city in the German state of Bavaria, in the administrative region of Middle Franconia. Situated on the Pegnitz river and the Rhine–Main–Danube Canal, it is located about north of Munich and is Franconia's largest city. The population is 505,664...

 and transferred to Ingolstadt
Ingolstadt is a city in the Free State of Bavaria, in the Federal Republic of Germany. It is located along the banks of the Danube River, in the center of Bavaria. As at 31 March 2011, Ingolstadt had 125.407 residents...

. There it was set up as a memorial in front of the station in 1968.

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