The Württemberg Tssd was a class of German narrow gauge,

steam locomotive A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...

operated by the

Royal Württemberg State Railways The Royal Württemberg State Railways (''Königlich Württembergische Staats-Eisenbahnen'' or ''K.W.St.E.'') were the state railways of the Kingdom of Württemberg (from 1918 the ''People's State of Württemberg'') between 1843 and 1920. Early ...

History

They were initially deployed on the ''Öchsle'' Railway in 1899 between

Biberach an der Riß Biberach an der Riß (, ; ), often referred to as simply Biberach (), is a town in southern Germany. It is the capital of Biberach (district), Biberach district, in the Upper Swabia region of the German state (Lands of Germany, Land) of Baden-Wü ...

and

Ochsenhausen Ochsenhausen () is a city in the district of Biberach (district), Biberach, Baden-Württemberg, Germany. It is located between the city of Biberach an der Riß, Biberach and Memmingen. it has a population of 9,261. The mayor of the town is Phil ...

. In addition they worked the Federsee Railway between Schussenried and

Riedlingen Riedlingen () is a town in the district (''Kreis'') of Biberach, Baden-Württemberg, in the south-west of Germany. It is one of the destinations of the Upper Swabian Baroque Route. Riedlingen has approximately 11,000 inhabitants. Geography ...

, the Zabergäu Railway between

Lauffen am Neckar Lauffen am Neckar (, ) or simply Lauffen is a town in the district of Heilbronn, Baden-Württemberg, Germany. It is on the river Neckar, southwest of Heilbronn. The town is famous as the birthplace of the poet Friedrich Hölderlin and for its q ...

and Leonbronn and the Bottwar Railway between

Marbach am Neckar Marbach am Neckar (, ) is a town about 20 kilometres north of Stuttgart. It belongs to the district of Ludwigsburg, the Stuttgart region and the European metropolitan region of Stuttgart. Marbach is known as the birthplace of Friedrich Schiller ...

and

Heilbronn Heilbronn () is a List of cities and towns in Germany, city in northern Baden-Württemberg, Germany, surrounded by Heilbronn (district), Heilbronn District. From the late Middle Ages on, it developed into an important trading centre. At the begi ...

Süd. A total of nine units were delivered in three series of three engines in 1899, 1901 and 1904 with fleet numbers 41–49. They were initially classified as Tss locomotives and later as Tssd 41–49. T is the abbreviation for

tank locomotive A tank locomotive is a steam locomotive which carries its water in one or more on-board water tanks, instead of a more traditional tender (rail), tender. Most tank engines also have Fuel bunker, bunkers (or fuel tanks) to hold fuel; in a #Tender ...

, ss means that it is a

narrow gauge A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge (distance between the rails) narrower than . Most narrow-gauge railways are between and . Since narrow-gauge railways are usually built with Minimum railw ...

locomotive with a

rail gauge In rail transport, track gauge is the distance between the two rails of a railway track. All vehicles on a rail network must have wheelsets that are compatible with the track gauge. Since many different track gauges exist worldwide, gauge dif ...

of , and the letter d, added later, was the abbreviation for duplex locomotive, because the steam was expanded twice, first in the high-pressure

cylinders A cylinder () has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an infinite ...

and then in the low-pressure cylinders. Today duplex locomotives are described as

compound locomotive A compound locomotive is a steam locomotive which is powered by a compound steam engine, compound engine, a type of steam engine where steam is expanded in two or more stages. The locomotive was only one application of compounding. Two and three ...

s. The engines carried of water (the third series had larger water tanks with a capacity) and of

coal Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other Chemical element, elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal i ...

. The maximal train load was on an incline of 1 in 40 (2.5%). All the engines were taken over by

Deutsche Reichsbahn-Gesellschaft The ''Deutsche Reichsbahn'' (), also known as the German National Railway, the German State Railway, German Reich Railway, and the German Imperial Railway, was the German national railway system created after the end of World War I from the re ...

and given the numbers 99 631 to 99 639. After the

Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

four engines were still in service. They were retired as follows: *Number 99 638 – 26 October 1954 *Number 99 639 – 27 November 1956 *Number 99 637 – 25 March 1965 *Number 99 633 – 18 March 1969

Preserved locomotives

Two locomotives, numbers 99 633 and 99 637 have been preserved. Locomotive 99 633 was under the ownership of the German Railway History Company (''DGEG'') and was loaned to the ''Öchsle Schmalspurbahn'' (Öchsle Narrow-Gauge Railway) and displayed in the Ochsenhausen shed, its original home. In 2007 the society bought it outright. Since the very first transmission of the SWR television programme,

Eisenbahn-Romantik Eisenbahn-Romantik () is a German television programme, broadcast by Südwestrundfunk, SWR. It portrays railway-related reports, whose content covers modern railway systems, Heritage railway, museum railways and their facilities as well as items ...

, it has featured in the introduction and the programme's logo. Number 99 637 is on display as a monument at the former station forecourt in

Bad Buchau Bad Buchau (; formerly Buchau; Swabian: ''Buacha'') is a small town in the district of Biberach, Baden-Württemberg, Germany with about 4,000 inhabitants. It is situated near Lake Federsee, which is separated from the town by a wide reed belt. ...

, its last home station.

References

* * * {{DEFAULTSORT:Wurttemberg Tssd Mallet locomotives Tssd 0-4-4-0T locomotives 750 mm gauge locomotives Narrow-gauge steam locomotives of Germany Esslingen locomotives B′B n4vt locomotives

History

Preserved locomotives

See also

References