The German DRG Class 02 (''Baureihe 02'' or ''BR 02'') engines were standard ('' Einheitslokomotiven'') express train locomotives with the

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 regiona ...

. Number 02 001 was the first ''

Einheitsdampflokomotive The Einheitsdampflokomotiven ("standard steam locomotives"), sometimes shortened to ''Einheitslokomotiven'' or ''Einheitsloks'', were the standardized steam locomotives built in Germany after 1925 under the direction of the Deutsche Reichsbahn-Gese ...

'' in the DRG to be completed. In procuring a standard

express train An express train is a type of passenger train that makes a small number of stops between its origin and destination stations, usually major destinations, allowing faster service than local trains that stop at most or all of the stations alo ...

steam locomotive, the Deutsche Reichsbahn carried out a comparison between a

superheated A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. Superheated steam is used in steam turbines for electricity generation, steam engines, and in processes such as steam reforming. There are ...

two-

cylinder A cylinder (from ) 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 infin ...

type (the

DRG Class 01 The Deutsche Reichsbahn-Gesellschaft's BR 01 steam locomotives were the first standardised (''Einheitsdampflokomotive'') steam express passenger locomotives built by the unified German railway system. They were of 4-6-2 "Pacific" wheel arrang ...

) and a four-cylinder

compound locomotive A compound locomotive is a steam locomotive which is powered by a 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 stages were used in shi ...

(the Class 02). Ten examples of each type were built from 1925, and the Class 02 vehicles were given operating numbers 02 001 – 02 010. The first eight engines were manufactured in 1925 by the firm of

Henschel Henschel & Son (german: Henschel und Sohn) was a German company, located in Kassel, best known during the 20th century as a maker of transportation equipment, including locomotives, trucks, buses and trolleybuses, and armoured fighting v ...

, two more were built in 1926 by Maffei. Because the Class 02 steam engines were badly designed, the compound engine could only produce a high level of power at speeds of over 70 km/h. In addition, below 100 PSi its steam consumption was higher than that of the Class 01. Compared with the Class 01s, these engines had a complicated, and therefore maintenance-intensive, drive; as a result no more were ordered. From 1937 to 1942 the vehicles were successively converted to two-cylinder operation and regrouped as Class 01s with the new numbers 01 011 and 01 233 – 01 241. The first eight engines were equipped with 2'2' T 30 tenders; the other two with 2'2 T 32 tenders. Later on, the second tender was coupled to all of the first eight engines as well.

Literature

* * * * * *

External links

Photos of locomotive 02 003
{{DRG locomotives 02 4-6-2 locomotives 02 Henschel locomotives Railway locomotives introduced in 1925 Compound locomotives Maffei locomotives Passenger locomotives Standard gauge locomotives of Germany 2′C1′ h4v locomotives

See also

Literature

External links