Editing 2-8-0 (section)

===Indonesia===
[[File:Schmalspurige 1D-Zweizylinder-Heißdampf-Güterzugokomotive der Holländischen Staatsbahnen auf Java (Holl. Indonesien), gebaut von Hanomag Hannover-Linden.jpg|thumb|SS Class 900 or DKA D50]]
In response to the increasing need for freight and passenger transports on the [[Bogor railway station|Buitenzorg]]–[[Bandung railway station|Bandung]]–[[Banjar railway station|Banjar]] line, the Java [[Staatsspoorwegen]] at the time ordered 42 ''Consolidation'' locomotives from 4 different engine manufacturers, including [[Swiss Locomotive and Machine Works|Swiss Locomotive and Machine Works (SLM)]], [[Hanomag]], [[Sächsische Maschinenfabrik|Hartmann]] and [[Werkspoor]], came in 1914, 1915 and 1921, classified as SS Class 900 (901–942). These locomotives were made to fulfill the requirements that submitted by SS, being able to haul 550 tons of freight with speeds of up to 50 km/h (31 mph) or 30 km/h (18.6 mph) on lines with a gradient of 4% or 1 in 25. In order to be able to negotiate 150 meters curve radius, the leading wheels adopted Adam axle system which could enable to turn radially by 70 mm. As for the fourth driving wheels, adopted ''Golsdorf'' axle system (patented by [[Karl Gölsdorf|Karl Golsdorf]]), this make the outer driving wheels able to move laterally by 100 mm. As by result, it's not only able to turn at 150 meters curve radius, but speeds up to 75 km/h (46.6 mph) was made possible from its initial of 50 km/h (31 mph). Based on record in 1938, the SS Class 900/DKA 50s ever been used to haul the ''Eendaagsche Express'' or One Day Express train on [[Bandung railway station|Bandung]]–[[Banjar railway station|Banjar]] southern-west line replacing the {{whyte|2-8-8-0}} SS Class 1250 (DKA DD52) due to resource and asset saving policies during [[Great Depression]]<ref>{{Cite book |last=Krijthe |first=E. |title=De 'Bergkoningin' en de spoorwegen in Nederlands-Indië, 1862-1949 |publisher=Nederlands Spoorwegmuseum |year=1983}}</ref> and {{whyte|2-6-2|T}} SS Class 1700/DKA C30s which were considered to be inefficient in serving the increasingly congested volume of freights and passenger transport. In 1939, the ''Eendaagsche Express'' shortened the time journey for [[Bandung]]–[[Yogyakarta]]–[[Surabaya]] to only 11 hours. These locomotives worked on [[Bandung railway station|Bandung–]][[Purwakarta railway station|Purwakarta–]][[Jakarta Kota railway station|Batavia]] line and also assigned to work the eastern express trains in [[East Java]] on [[:id:Stasiun_Banyuwangi|Banyuwangi]]–[[Surabaya Kota railway station|Surabaya]] line in tandem with {{whyte|4-6-4|T}} SS Class 1100 (DKA C27). To make the SS 900s have the characteristics of express locomotive, each unit received the modification of two pair of [[smoke deflectors]].<ref>Spoor- en Tramwegen, 5 July 1938 </ref><ref>Spoor- en Tramwegen, 16 January 1943</ref> In the need of increasing freight transport in [[South Sumatra]], the Java [[Staatsspoorwegen]] allocated 4 of them to serve coal transport from Bukit Asam to [[Kertapati railway station|Kertapati]]. Not quite a long, the South Sumatra division of SS or so called ''Zuid-Sumatra [[Staatsspoorwegen]]'' (ZSS) were also ordered 11 of these from two German engine manufacturers, 5 were imported from [[Sächsische Maschinenfabrik|Hartmann]] in 1925 and the rest of 6 from [[Hanomag]] in 1926.<ref>{{Cite book |last=Oegema |first=J.J.G. |title=De Stoomtractie op Java en Sumatra |publisher=Kluwer Technische Boeken, B.V. |year=1982 |isbn=9789020115208 |location=Deventer-Antwerpen}}</ref><ref>{{Cite book |last=Durrant |first=A.E. |title=PNKA Power Parade |publisher=Continental Railway Circle |year=1974 |isbn=9780950346908}}</ref>      

==== Preservation ====
[[File:Lokomotif D50.jpg|thumb|upright|SS 911 or DKA D5011 at the Transportation Museum of [[Taman Mini Indonesia Indah]]]]
During [[Japanese occupation of the Dutch East Indies|Japanese occupation]] in 1942, all Dutch East Indies railway locomotives were renumbered based on [[Japan Railways locomotive numbering and classification|Japanese numberings]], this including the SS Class 900s were renumbered to D50s and this numbering system still used after the Independence of Indonesia by ''Djawatan Kereta Api'' (DKA) or Department of Railways of the Republic of Indonesia up to now. During [[Indonesian National Revolution]] some of SS Class 900/DKA D50 were used among the others to haul trains belonging to Republican fighters and the Dutch military. In some records, some of them were destroyed in action due to the conflict. While the SS911 or DKA D50 11 was captured by 2nd Company of ''1e Bataljon, 15 Regiment Infanterie'' of Dutch Marines during [[Operation Kraai]] in Yogyakarta. After the acknowledgement of Indonesian sovereignty by Dutch in 1949, the SS Class 900 were transferred to ''Djawatan Kereta Api''. In 1976, most of D50s were found regularly in [[Jember railway station|Jember]], East Java which many of them had been dumped out and seemed to be derelict. While the rest of them are still used regularly in South Sumatra pulling some coal trains. Out of 61 units, only DKA D50 11 (ex-SS911) survived and now preserved as static display in Transportation Museum of [[Taman Mini Indonesia Indah]].<ref>{{Cite web |last=Dickinson |first=Rob |title=PNKA Wallahs Part 7 |url=https://www.internationalsteam.co.uk/java/ford/ford07.htm |website=The International Steam Pages}}</ref><ref>{{Cite web |last=Dickinson |first=Rob |title=A Month in Java, 1976 Part 4 |url=https://www.internationalsteam.co.uk/java/java7604.htm |website=The International Steam Pages}}</ref><ref>{{Cite web |last=Dickinson |first=Rob |title=Java |url=https://www.internationalsteam.co.uk/incredibleindonesia/javagalleryd50.htm |website=The International Steam Pages}}</ref>