TAG7
Quantity	1
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	1936
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
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....	11,600 mm
Ø Driving wheels	1,100 mm
Ø Leading wheels	850 mm
Ø Trailing wheels	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 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	1.69 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 brakes

The TAG 7 is a superheated steam locomotive

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

, that was developed and built in 1936 by 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...

 as EAG 7 for the private Schaftlach-Gmund-Tegernsee Railway Company (Eisenbahn-Aktiengesellschaft Schaftlach-Gmund-Tegernsee or EAG) - later the Tegernsee Railway AG (TAG). Today it belongs to the Bavarian Localbahn Union.

This tank locomotive with its 1'D1' axle arrangement, together with its two sister engines 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...

, is the last and most powerful branch line (Lokalbahn) locomotive to be built in Bavaria

Bavaria

Bavaria, formally the Free State of Bavaria is a state of Germany, located in the southeast of Germany. With an area of , it is the largest state by area, forming almost 20% of the total land area of Germany...

. Its power of 470 PSi enabled a top speed of 70 km/h in both directions. The EAG needed the new engines to relieve its two smaller locomotives, nos. EAG 5 and 6 (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 :...

s) and to gradually take the aging and rickety EAG 3 and 4 out of service. TAG 7 proved itself so well, that a year later two more engines were built by 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...

 (the aforementioned LAG Nos. 87 and 88).

TAG 7 served until 1975 as the reserve loco for the Tegernsee Railway (TAG), but at the same time, during the 1970s, was already being used for museum runs, organised by a working group of the German Railway History Company or DGEG

DGEG

The German Railway History Company or DGEG is a society concerned with the history of the railways...

. Because there was a threat that the engine would have to stop operating and be scrapped due to its licence running out, the Bavarian Localbahn Union was founded in order to raise the money for the required general inspection. The engine - de jure still the property of the TAG - remained stabled during the 1990s at Tegernsee, whilst the Localbahn Union paid for all furthe inspections and maintenance. In 1999, after the transfer of operations on the Tegernsee Railway to the Bavarian Highland Railway (Bayerische Oberlandbahn), the TAG finally sold the engine to the Union. At the same time the locomotive shed in Tegernsee had to be cleared. TAG 7 has been stationed in Landshut shed since and is once again in service. Since May 2005 TAG 7 has had PZB 90 train running control system. The locomotive is currently out of order due to a boiler damage, the owner BLV plans to build a new boiler.

External links

• Brief information about the TAG 7 by the TAG's successor company
• There is a relevant English-language discussion forum at Railways of Germany