0-4-4-2T

{{Short description|Locomotive wheel arrangement}} {{Use dmy dates|date=January 2023}} {{More citations needed|date=July 2025}} [[File:Maloja23G22+23RhBi.jpg|thumb|300px|A Swiss [[narrow gauge railway|narrow gauge]] [[Rhaetian Railway G 2/2+2/3|G 2/2+2/3]] locomotive of the [[RhB|Rhaetian Railway]] in 1908]] In [[Whyte notation]] for the classification of [[steam locomotive]]s by [[wheel arrangement]], an '''0-4-4-2T''' is a locomotive that has no [[leading wheel]]s, two sets of four [[driving wheel]]s and two [[trailing wheel]]s. All known examples were articulated [[Mallet locomotive|Mallet]] tank locomotives.

==Equivalent classifications== Other equivalent classifications are: *[[UIC classification]]: '''B′B1′ n4vt''' (also known as German classification and [[Italian classification]]) *[[French classification]]: '''020+021''' *[[Turkish classification]]: '''22+23''' *[[Swiss classification]]: '''2/2+2/3'''

==Examples== === Rhaetian Railway === The first Mallet engines of this type were built for the [[Rhaetian Railway]] in Switzerland. The steeply-graded [[metre gauge]] railway opened initially with conventional [[2-6-0T]] locomotives but soon upgraded to a pair of [[0-4-4-0T]] Mallets. Expansion to [[Thusis railway station|Thusis]] in 1896 needed more locomotives and these were the [[Rhaetian Railway G 2/2+2/3|first two 0-4-4-2T Mallets]], with additional water capacity in a [[well tank]] at the rear, supported by the trailing truck. The design was not entirely successful and [[Rhaetian Railway G 2/3+2/2|a later batch]] in 1902 for the extension to reach [[St. Moritz railway station|St. Moritz]] were built instead as [[2-4-4-0T]]. The earlier locos were then rebuilt to match.<ref >{{Cite book |title=Engines That Bend: Narrow Gauge Articulated Locomotives |first=David |last=Joy |isbn=978-1-902827-23-0 |publisher=Atlantic Publishers |year=2012 |chapter=2: Mallet dominance |page=34 }}</ref>

=== Staatsspoorwegen class 500 === [[File:DKA BB10 (10 12 A).jpg|thumb|SS 512 or DKA BB10 12 at Ambarawa Railway Museum]] 0-4-4-2Ts were the first-generation Mallets used by Indonesia since the colonial period in late 19th to early 20th century, when ''[[Staatsspoorwegen]]'' (the state railway company of the Dutch East Indies) ordered 12 units from [[Sachsische Maschinenfabrik|Hartmann]] and 4 from [[Berliner Maschinenbau|Schwartzkopff]] in 1899–1908, classified as {{ill|:en:Indonesian Railways class BB10|lt=SS 500 class / later BB10|id|Lokomotif_BB10}} (501–516) for use on mountain lines in [[West Java]]. These locomotives worked mixed trains that transported plantation crops and passengers on the [[Bogor railway station|Buitenzorg]]–[[Bandung railway station|Bandung]] line which opened in 1884.<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=978-90-201-1520-8 |language=Dutch }}</ref> These oil-burned engine had power output of {{cvt|465|hp|kW}}, which was more powerful and suitable for running the winding mountain terrain with ease compared to older SS locomotives the [[2-6-0]]T (SS Class 300 or DKA C11 and SS Class 400 or DKA C12) which are smaller and slower in size and engine power. The SS 500s were also worked at [[Rangkasbitung railway station|Rangkasbitung]] and [[Banjar railway station|Banjar]]. Of the 16 built, only BB10 12 (ex-SS 512) is preserved.

The SS Class 500 was {{cvt|10.5|m|ftin}} long with {{cvt|1050|mm|ftin}} diameter wheels and a weight of {{cvt|44.1|MT|ST}}. It had a maximum speed of {{cvt|50|km/h|mph}}. During [[Japanese occupation of the Dutch East Indies|Japanese occupation]] in 1942, these locomotives were renumbered to BB10 and used on [[Saketi–Bayah railway]] construction which was used as Japanese war effort for coal transport to the southern coast of West Java as from coal mining in [[Cikotok]].<ref >{{Cite book |author=Yoga Bagus Prayogo |author2=Yohanes Sapto Prabowo |author3=Diaz Radityo |title=Kereta Api di Indonesia. Sejarah Lokomotif di Indonesia |trans-title=Railways in Indonesia. The History of Locomotives in Indonesia |publisher=Jogja Bangkit Publisher |year=2017 |isbn=978-602-0818-55-9 |location=Yogyakarta |language=Indonesian }}</ref> This line was also known as "Death Railway" due to its construction using Japanese PoWs and local residents which were known as ''romusha'' or force laborers.<ref>{{Cite book |last=Sato |first=Shigeru |title=War, Nationalism and Peasants: Java under the Japanese occupation 1942-1945 |publisher=ASAA South East Asia |year=1994 |isbn=978-1-56324-545-9 }}</ref> One of the BB10 (number 05) was used on Indonesian movie titled "''Lebak Membara''" (1982) produced by Sabirin Kasdani which tells the story about Indonesian fighters during the Japanese occupation. The last mallets were built for Indonesian Railway (DKA) were 4 units of Type BB1n4v by [[Nippon Sharyo]] or known as BB80 class (81–84) came in 1962 for narrow gauge ([[750 mm gauge railways|750 mm]]) railway line in [[Aceh]]. The line itself was built in 1876–1917 by ''[[Atjeh Tram]]'' which was a part of ''[[Staatsspoorwegen|Staatsspoowegen]]'' tram division. The BB80s becoming the only Mallets that were manufactured in [[Asia]]. From 4 of them only BB84 is preserved on static display in [[Banda Aceh]].

== References == {{Reflist}}

==External links== {{Commons}} *[http://members.tripod.com/~keretapi/steamroster.html Indonesian Mallet engine information]

[[Category:Whyte notation|44,0-4-4-2]]