Württemberg AD
Encyclopedia
The Württemberg AD was a German steam locomotive
built for the Royal Württemberg State Railways
. It was an express train engine with a 4-4-0
wheel arrangement and was built from 1899 by the Maschinenfabrik Esslingen
('Esslingen Engineering Works'). Up to that point the railway only had increasingly elderly locomotives with a 2-4-0
configuration.
The vehicles were equipped with a two-cylinder, compound engine
. The most striking feature was the large, horizontal pipe connecting the two steam dome
s. Ninety eight engines of this class were built by 1907; they initially had flat slide valves, but from 1903 piston valves were installed.
In 1907 two locomotives were tested with two-cylinder, superheated steam engines. This reduced the boiler
overpressure
to 117.7 N/cm² and generated an improvement in performance of about 20%. As a result, 17 more locomotives were built to this configuration up to 1909 and were designated as Class ADh.
Both classes began to be retired in the early 1920s.
The Deutsche Reichsbahn
took over 24 of the compound locomotives as DRG Class 13.16 with numbers 13 1601 to 13 1624, and 14 superheated locomotives as DRG Class 13.17 with numbers 13 1701 to 13 1714. The first ones were retired in 1928, the last in 1932.
The locomotives were equipped with Württemberg wü 2 T 10 and wü 3 T 15,5 tenders.
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...
built for the Royal Württemberg State Railways
Royal Württemberg State Railways
The Royal Württemberg State Railways were the state railways of the Kingdom of Württemberg between 1843 and 1920...
. It was an express train engine with a 4-4-0
4-4-0
Under the Whyte notation for the classification of steam locomotives, 4-4-0 represents the wheel arrangement of four leading wheels on two axles , four powered and coupled driving wheels on two axles, and no trailing wheels...
wheel arrangement and was built from 1899 by the Maschinenfabrik Esslingen
Maschinenfabrik Esslingen
Maschinenfabrik Esslingen , was a German engineering firm that manufactured locomotives, tramways, railway wagons, roll-blocks, technical equipment for the railways, , bridges, steel structures, pumps and boilers.-Founding:...
('Esslingen Engineering Works'). Up to that point the railway only had increasingly elderly locomotives with a 2-4-0
2-4-0
Under the Whyte notation for the classification of steam locomotives, 2-4-0 represents the wheel arrangement of two leading wheels on one axle, four powered and coupled driving wheels on two axles, and no trailing wheels....
configuration.
The vehicles were equipped with a two-cylinder, compound engine
Compound locomotive
A compound engine unit is a type of steam engine where steam is expanded in two or more stages.A typical arrangement for a compound engine is that the steam is first expanded in a high-pressure cylinder, then having given up heat and losing pressure, it exhausts directly into one or more larger...
. The most striking feature was the large, horizontal pipe connecting the two steam dome
Steam dome
A Steam dome is a vessel fitted to the top of the boiler of a steam locomotive. It contains the opening to the main steam pipe and its purpose is to allow this opening to be kept well above the water level in the boiler...
s. Ninety eight engines of this class were built by 1907; they initially had flat slide valves, but from 1903 piston valves were installed.
In 1907 two locomotives were tested with two-cylinder, superheated steam engines. This reduced 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:...
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...
to 117.7 N/cm² and generated an improvement in performance of about 20%. As a result, 17 more locomotives were built to this configuration up to 1909 and were designated as Class ADh.
Both classes began to be retired in the early 1920s.
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....
took over 24 of the compound locomotives as DRG Class 13.16 with numbers 13 1601 to 13 1624, and 14 superheated locomotives as DRG Class 13.17 with numbers 13 1701 to 13 1714. The first ones were retired in 1928, the last in 1932.
The locomotives were equipped with Württemberg wü 2 T 10 and wü 3 T 15,5 tenders.
See also
- Royal Württemberg State RailwaysRoyal Württemberg State RailwaysThe Royal Württemberg State Railways were the state railways of the Kingdom of Württemberg between 1843 and 1920...
- List of Württemberg locomotives and railbuses
External links
- There is a relevant English-language forum at Railways of Germany