DRG Class 98.11
Quantity	29
Numbers	98 1101 - 98 1129
Manufacturer	(Weiden Repair Shop)
Entered service	1934 - 1941
Retired	1960 - 1968
Wheel arrangement (Whyte Whyte notation The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte and came into use in the early twentieth century encouraged by an editorial in American Engineer and Railroad Journal... )	2-8-0
Axle arrangement (UIC UIC classification The UIC classification of locomotive axle arrangements describes the wheel arrangement of locomotives, multiple units and trams. It is set out in the International Union of Railways "Leaflet 650 - Standard designation of axle arrangement on locomotives and multiple-unit sets". It is used in much... )	1'D h2t
Average axle load Axle load The axle load of a wheeled vehicle is the total weight felt by the roadway for all wheels connected to a given axle. Viewed another way, it is the fraction of total vehicle weight resting on a given axle...	113.8 kN
Length over buffers Buffer (rail transport) A buffer is a part of the buffers-and-chain coupling system used on the railway systems of many countries, among them most of those in Europe, for attaching railway vehicles to one another....	10,200 mm
Ø Driving wheel Driving wheel On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons...	1,006 mm
Ø Carrying wheel	800 mm
Top speed	55 km/h
Boiler Boiler A boiler is a closed vessel in which water or other fluid is heated. The heated or vaporized fluid exits the boiler for use in various processes or heating applications.-Materials:...  overpressure Overpressure The term Overpressure is applied to a pressure difference, relative to a "normal" or "ambient" pressure, in various circumstances:* In engineering: the pressure difference over the wall thickness of a pressure vessel...	117.7 kN/cm²
Piston stroke	508 mm
Cylinder bore Cylinder (steam locomotive) The cylinders of a steam locomotive are the components that convert the power stored in the steam into motion.Cylinders may be arranged in several different ways.-Early locomotives:...	460 mm
Grate area	1.36 m²
Evaporative heating area	60.99 m²
Superheater Superheater A superheater is a device used to convert saturated steam or wet steam into dry steam used for power generation or processes. There are three types of superheaters namely: radiant, convection, and separately fired...  area	18.93 m²
Power	450 PSi
Adhesive weight Adhesive weight Adhesive weight is the amount of a locomotive's weight that is applied to the driving wheels and so capable of delivering traction. The more weight applied to the driving wheels, the greater the locomotive's ability to haul a load. But if the weight on the driving wheels exceeds the axle load of...	416.8 kN
Service weight	497.2 kN
Brakes	Compressed air brakes

The Class 98.11 steam locomotives of the Deutsche Reichsbahn

Deutsche Reichsbahn-Gesellschaft

The Deutsche Reichsbahn – was the name of the German national railway created from the railways of the individual states of the German Empire following the end of World War I....

 were rebuilds of the Bavarian Class GtL 4/4

Bavarian GtL 4/4

The Bavarian Class GtL 4/4 engines were superheated steam locomotives in service with the Royal Bavarian State Railways for duties on branch lines .- History :...

 (DRG Class 98.8-9).

Because the riding qualities of the Class 98.10

DRG Class 98.10

The locomotives of DRG Class 98.10 were superheated steam locomotives with the Deutsche Reichsbahn-Gesellschaft....

 were still not good enough to raise the speed of branch line (Lokalbahn) trains in Bavaria significantly, the Reichsbahn decided in 1934 to rebuild a Class GtL 4/4 engine (no. 98 906). Amongst other things, it was given an additional leading axle. As a result the boiler

Boiler

A boiler is a closed vessel in which water or other fluid is heated. The heated or vaporized fluid exits the boiler for use in various processes or heating applications.-Materials:...

 and driver's cab had to be moved forward, which resulted in their having to be raised by 250 mm.

After trials with the locomotive had proved successful, it was decided to modify another 26 engines by 1939 and to allocate them to a new locomotive class. A further engine followed in each of the years 1940 and 1941. The rebuilds were given numbers 98 1101 - 98 1129.

The permitted top speed of the rebuilds could be raised to 55 km/h, compared with 40 km/h for the GtL 4/4 and 45 km/h for the Class 98.10.

All 29 locomotives survived the Second World War. Apart from 98 1108, which went to the DR in East Germany, they all went into 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 '...

. The East German engine was retired in 1967; those in the West between 1960 and 1968.

See also

• List of Bavarian locomotives and railbuses
• List of DRG locomotives and railbuses

External links

• There is a relevant English-language forum at Railways of Germany