DRG Class 98.10
Quantity	45
Number(s)	98 1001 - 98 1045
Manufacturer	Krauss, Krauss-Maffei Krauss-Maffei The Krauss-Maffei Wegmann GmbH & Co KG or simply Krauss-Maffei is an injection molding machine manufacturer and defence company based in Munich, Germany...
Entered service	1929 - 1933
Retired	1957 - 1966
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... )	0-8-2T
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...	D1' 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...	114.7 kN
Length over buffers	10,050 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	850 mm
Top speed	45 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 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:...  bore	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...	453.1 kN
Service weight	534.5 kN
Brakes	Compressed-air brakes

The locomotives of DRG Class 98.10 (Baureihe 98.10 and, unofficially, the Bavarian GtL 4/5) were superheated

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...

 steam locomotives with the Deutsche Reichsbahn-Gesellschaft

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....

.

After the Bavarian 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 :...

 (Bayerische GtL 4/4) class engines had proved to be very reliable and had all been taken over by the Reichsbahn, it was decided to build further examples of them. However, because they were very slow with a top speed of 40 km/h, the design was modified and the so-called GtL 4/5 was built with an additional trailing axle, that was linked to the final coupled axle by a Krauss-Helmholtz bogie

Krauss-Helmholtz bogie

A Krauss-Helmholtz bogie is a mechanism used on a steam locomotive, where a carrying axle is connected to a coupled axle via a lever such that when the carrying axle swings to the side on going round a curve, it causes the coupled axle to move sideways in the opposite direction...

.

In 1929 Krauss

Krauss-Maffei

The Krauss-Maffei Wegmann GmbH & Co KG or simply Krauss-Maffei is an injection molding machine manufacturer and defence company based in Munich, Germany...

 supplied the first five examples of these machines. In 1930 and 1931 there followed further batches of six and ten locomotives respectively. The remaining engines were manufactured by the newly-created firm of Krauss-Maffei in 1932 and 1933.

In spite of the extra carrying axle the top speed could only be raised to 45 km/h, so that later rebuilds or new engines were based on the 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 :...

 (the rebuild becoming the DRG Class 98.11

DRG Class 98.11

The Class 98.11 steam locomotives of the Deutsche Reichsbahn were rebuilds of the Bavarian Class GtL 4/4 .Because the riding qualities of the Class 98.10 were still not good enough to raise the speed of branch line trains in Bavaria significantly, the Reichsbahn decided in 1934 to rebuild a Class...

 (1'D)) and LAG Nos. 87 and 88

LAG Nos. 87 and 88

The Bavarian engines with railway numbers 87 and 88 were superheated steam locomotives with the Localbahn AG . They were the last two engines that the LAG procured because shortly after their delivery in 1937, the company was finally nationalised...

 (1'D1')).

All 45 locomotives of DRG Class 98.10 passed over to 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 '...

 after the Second World War. Their retirement began in 1957 and was complete by 1966.

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