2-6-6-0

Last updated
2-6-6-0
WheelArrangement 2-6-6-0.svg
Front of locomotive at left
Class MA 2-6-6-0 no. 336.jpg
Equivalent classifications
UIC class (1C)C, (1'C)C
French class 130+030
Turkish class 34+33
Swiss class 3/4+3/3
Russian class1-3-0+0-3-0
First known tank engine version
First use1904
CountryDutch East Indies (Indonesia)
LocomotiveSS Class 520 (DKA CC10)
Railway Staatsspoorwegen
DesignerSachsische Maschinenfabrik (Hartmann)
Builder Sachsische Maschinenfabrik
First known tender engine version
First use1909
Country Colony of Natal
Locomotive NGR 2-6-6-0, SAR Class MA
Railway Natal Government Railways
Designer American Locomotive Company
BuilderAmerican Locomotive Company

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, 2-6-6-0 is a locomotive with one pair of unpowered leading wheels, followed by two sets of three pairs of powered driving wheels and no trailing wheels. The wheel arrangement was principally used on Mallet-type articulated locomotives. Some tank locomotive examples were also built, for which various suffixes to indicate the type of tank would be added to the wheel arrangement, for example 2-6-6-0T for an engine with side-tanks.

Contents

Overview

The 2-6-6-0 wheel arrangement was most often used for articulated compound steam Mallet locomotives. In a compound Mallet, the rear set of coupled wheels are driven by the smaller high pressure cylinders, from which spent steam is then fed to the larger low pressure cylinders that drive the front set of coupled wheels. [1] [2] [3]

Usage

Indonesia

First batch of 2-6-6-0T used by Java Staatsspoorwegen (State Railway) Java State Railways 2-6+6-0 steam locomotive Nr. 360 (Schwartzkopff Locomotive Works, Berlin 4134 1907).jpg
First batch of 2-6-6-0T used by Java Staatsspoorwegen (State Railway)
Second batch of 2-6-6-0T Java State Railway from Werkspoor HUA-172047-Afbeelding van de fabrieksnieuwe stoomlocomotief nr 367 367 376 van de Staatsspoorwegen in Nederlands Indie bij Werkspoor te Amsterdam.jpg
Second batch of 2-6-6-0T Java State Railway from Werkspoor

The Java Staatsspoorwegen (SS/JSS) operated its first of 2-6-6-0Ts in the 1904. The first batch was delivered between 1904 and 1909 from Schwartzkopff and Hartmann. The second batch, delivered between 1910 and 1911, was built by Werkspoor. The front water tanks of the first batch are square, those on the second batch are sloped. [4] [5] These were successor of the first Mallets the 0-4-4-2 T SS Class 500s (DKA BB10s), which were delivered in 1900 and worked on the 3 ft 6 in (1,067 mm) gauge heavy mountain lines of West Java. [6] Just after arrived on Java, these engines classified as SS Class 312–387, but later renumbered as SS Class 520 (521–543) and worked for mixed passenger and freight trains on Purwakarta–Bandung and Cicalengka–Banjar lines. After Japanese occupation and Indonesian Independence, these locomotives were renumbered to CC10 and used by Djawatan Kereta Api (DKA / The Department of Railway), also known as the Indonesian State Railway. By the end of the service, the CC10s were allocated in Rangkasbitung and Cibatu depots. All of CC10s were withdrawn from active service in 1980s and scrapped. [4]

In 1927–1928, the Java Staatsspoorwegen imported 16 2-6-6-0 Mallet locomotives from the Swiss Locomotive and Machine Works and 14 from Werkspoor for the mountain lines in West Java. [7] These were a compact version of the Bull Moose 2-8-8-0 SS Class 1250 (DKA DD52). They worked on Cibatu–Garut–Cikajang and PurwakartaPadalarang lines. The experience gained by the SS modifying earlier Mallets helped them design these locomotives to use standard parts that could be exchanged with other SS locomotives. These locomotives also known as De Bergkoningin or The Queen of the Mountain. They were known as Si Gombar by locals due to the ability on the mountain lines and its huge size. The Class 1600 proved more powerful than other SS locomotives, and able to haul trains weighing 1,300 tons at a speed of 55 kilometres per hour (34 mph), and being able to negotiate tight curves. These locomotives were used throughout Java. [4] During the Japanese occupation of the Dutch East Indies in 1942, all of SS locomotives were renumbered based on the Japanese numberings. The Class 1600s were renumbered CC50. This numbering system remained in use after the Independence of Indonesia by Djawatan Kereta Api (DKA). By 1971, these locomotives were located at Cibatu, Banjar, Purwakarta, Purwokerto, Ambarawa, Madiun and Sidotopo (Surabaya) locomotive depots. [8] The last operational units of the class was based at Cibatu and they were withdrawn from service in 1984. [9]

Preservation

DKA CC50 29 at Ambarawa Railway Museum DKA CC50 (50 29 A).jpg
DKA CC50 29 at Ambarawa Railway Museum

The steam era in Indonesia ended in the early 1980s. The remaining locomotives were dumped in station sheds. The last CC50 retired in 1984 after the closure of Cibatu-Garut line.

In 1981, CC50 22 from Purwokerto depot was donated by the Indonesian government to the Railway Museum (Netherlands), as a symbol of friendship between Indonesia and the Netherlands. This locomotive was returned to its original colonial number 1622. In 2023, only three CC50s remain: 01 and 22 built by Werkspoor and SLM 29. CC50 01 is preserved at the Transportation Museum of Taman Mini Indonesia Indah, CC50 22 at Netherlands Railway Museum and CC50 29 at Ambarawa Railway Museum.

New Zealand

NZR E class 2-6-6-0T Mallet E66 Petone Workshops 1906.JPG
NZR E class 2-6-6-0T Mallet

The sole NZR E class locomotive of 1906 was the only 2-6-6-0T locomotive ever built for and used by the New Zealand Railways Department. It was built at the Petone Workshops in Wellington and was designed for use on the world famous Rimutaka Incline. Numbered 66, making it E 66, it spent the first part of its working life in the Wellington region hauling trains up and down the Rimutaka Incline. It was eventually transferred to the Wellington-Johnsonville section for banking duties, even though it was not designed for that type of work. In 1917, E 66 was withdrawn from service and scrapped. It did not survive long enough for preservation. [10]

South Africa

The South African Railways (SAR) operated 57 Mallet locomotives with this wheel arrangement, spread over six classes, all of them 3 ft 6 in (1,067 mm) Cape gauge .

SAR Class MB Mallet SAR Class MB 1602 (2-6-6-0) NGR 337.jpg
SAR Class MB Mallet
SAR Class MC1 Mallet Class MC1 (2-6-6-0).jpg
SAR Class MC1 Mallet
SAR Class MJ1 Mallet SAR Class MJ1 1673 (2-6-6-0).jpg
SAR Class MJ1 Mallet

United States

Virginian Railway Class AA Mallet Virginian Ry Class AA 2-6-6-0 Mallet.png
Virginian Railway Class AA Mallet

At least two American railroads used 2-6-6-0 Mallet locomotives. One was the Denver, Northwestern and Pacific Railway, which later became the Denver and Salt Lake Railroad and eventually the Denver and Salt Lake Railway. Towards the end of their service life, after the acquisition of the Denver and Salt Lake, these locomotives were used by the Denver and Rio Grande Western Railroad (D&RGW). The locomotives were initially used across the Rollins Pass and later on the Moffat Tunnel route of the Denver and Salt Lake. None were preserved; they were all scrapped by the D&RGW between 1947 and 1952.

Another was the Virginian Railway, whose Class AA 2-6-6-0 is depicted.

References

  1. Compounding Steam Engines
  2. 1 2 Holland, D.F. (1971). Steam Locomotives of the South African Railways. Vol. 1: 1859–1910 (1st ed.). Newton Abbott, England: David & Charles. pp. 103–105. ISBN   978-0-7153-5382-0.
  3. 1 2 3 4 5 6 7 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 84–85, 87–88. ISBN   0869772112.
  4. 1 2 3 Yoga Bagus Prayogo; Yohanes Sapto Prabowo; Diaz Radityo (2017). Kereta Api di Indonesia. Sejarah Lokomotif di Indonesia (in Indonesian). Jogjakarta: Jogja Bangkit Publisher. ISBN   978-602-0818-55-9.
  5. De Jong, H. (1986). De Locomotieven van Werkspoor (in Dutch). Alk. ISBN   978-90-6013-933-2.
  6. Oegema, J.J.G. (1982). De Stoomtractie op Java en Sumatra (in Dutch). Deventer-Antwerpen: Kluwer Technische Boeken. ISBN   978-90-201-1520-8.
  7. De Jong, H. (1986). De Locomotieven van Werkspoor (in Dutch). Alk. ISBN   978-90-6013-933-2.
  8. Durrant, A.E. (1974). PNKA Power Parade. Continental Railway Circle. ISBN   978-0-9503469-0-8.
  9. Lythgoe, Wilson; Dickinson, Rob. "Once upon a time, long ago, Another Visit to the Last Working Mallet Tender Engines in the World..., Java, 1983". internationalsteam.co.uk. Retrieved 14 April 2025.
  10. E. J. McClare, Steam Locomotives of New Zealand, Part Two: 1900 to 1930 (Wellington: New Zealand Railway and Locomotive Society, 1988), 95.
  11. 1 2 3 4 5 6 Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. pp. 13–14, 21–22, 29, 36–37, 140. ISBN   978-0-7153-5427-8.
  12. 1 2 3 Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer's Office, Pretoria, January 1912, pp. 9, 12, 15, 46 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
  13. 1 2 3 North British Locomotive Company works list, compiled by Austrian locomotive historian Bernhard Schmeiser
  14. 1 2 South African Railways and Harbours Locomotive Diagram Book, 2'0" & 3'6" Gauge Steam Locomotives, 15 August 1941, as amended
  15. Hendrie (10 December 1921). "Engine Power on the S.A.R." South African Mining and Engineering Journal. XXXII (1576): 529.
  16. North British Locomotive Co. works list (from J. Lambert)
  17. Durrant, AE (1989). Twilight of South African Steam (1st ed.). Newton Abbott: David & Charles. pp. 24–25. ISBN   0715386387.