LAG Nos. 87 and 88 - AbsoluteAstronomy.com

LAG Nr. 87 und 88 DRG Class 98.18
Quantity	2
Numbers	DRG: 98 1801 - 98 1802
Manufacturer	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	1937
Retired	1960
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... )	2-8-2
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'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...	11.7 Mp 114.7 kN
Länge über Puffer	11,600 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...	1,100 mm
Ø Leading wheel Leading wheel The leading wheel or leading axle of a steam locomotive is an unpowered wheel or axle located in front of the driving wheels. The axle or axles of the leading wheels are normally located in a truck...	850 mm
Ø Trailing wheel Trailing wheel On a steam locomotive, a trailing wheel or trailing axle is generally an unpowered wheel or axle located behind the driving wheels. The axle of the trailing wheels was usually located on a trailing truck...	850 mm
Top speed	70 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...	137.3 kN/cm²
Piston stroke	508 mm
Cylinder bore	460 mm
Grate area	1.69 m²
Evaporative heating area	66.11 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	32.60 m²
Power	470 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	596.2 kN
Brakes	Compressed-air brake

The Bavarian engines with railway numbers 87 and 88 were superheated steam locomotives with the Localbahn 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...

(LAG). They were the last two engines that the LAG procured because shortly after their delivery in 1937, the company was finally nationalised. The locomotives were largely similar in their design to the TAG 7

TAG 7

The TAG 7 is a superheated steam locomotive, that was developed and built in 1936 by Krauss-Maffei as EAG 7 for the private Schaftlach-Gmund-Tegernsee Railway Company - later the Tegernsee Railway AG...

locomotive, that had been developed in 1936 by Krauss-Maffei for the Tegernsee Railway AG (Tegernseebahn AG or TAG). TAG 7 (and its two sister engines) were the last branch line (Lokalbahn) locomotives to be designed and built in Bavaria. Unlike the two LAG engines, TAG 7 survived, first as the operating reserve for the Tegernseebahn and later as a museum locomotive. It is maintained by the Bavarian Localbahn Society

Bavarian Localbahn Society

The Bavarian Localbahn Society , with its headquarters in Tegernsee, is a society that is concerned with the history of the railways in Bavaria. Localbahn means 'branch line' and is mainly used in southern Germany and Austria in lieu of the usual term Nebenbahn...

and regularly used for museum trips around Munich

Munich

Munich The city's motto is "" . Before 2006, it was "Weltstadt mit Herz" . Its native name, , is derived from the Old High German Munichen, meaning "by the monks' place". The city's name derives from the monks of the Benedictine order who founded the city; hence the monk depicted on the city's coat...

.

TAG 7 and her sisters are the end of a line of development from the first six-wheeled, branch line engines at the end of the 19th century through 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 :...

(DRG classes 98.8-9 and 9.16) and the Bavarian GtL 4/5 (DRG Class 98.10

DRG Class 98.10

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

and 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...

). The relationship between the various types is externally very clearly visible. Under the old Bavarian classification scheme, the TAG/LAG engines would have been GtL 4/6 locomotives. Unlike the GtL 4/5, they took the original design of the GtL4/4 and extended it by two carrying axles that were each located in 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...

. The coupled wheel diameter was increased from 1,006 to 1,100 mm. This resulted in very good riding qualities in both directions and the top speed could be raised to 70 km/h. The three locomotives were the largest and most powerful Lokalbahn locomotives ever to be operated in Germany.

At first the two LAG engines were stabled in Füssen

Füssen

Füssen is a town in Bavaria, Germany, in the district of Ostallgäu situated from the Austrian border. It is located on the banks of the Lech river. The River Lech flows into the Forggensee...

. Both were transferred to the ownership of 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...

as Class 98.18 and were taken over by 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. The remained in service until 1960, at the end in Kempten.

External links

Brief information by the TAG successor company about TAG 7 (German)
There is a relevant English-language forum at Railways of Germany

The source of this article is wikipedia, the free encyclopedia. The text of this article is licensed under the GFDL.

See also

External links