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2-4-4-2

In Whyte notation, 2-4-4-2 refers to a railroad steam locomotive that has two leading wheels followed by two sets of four coupled driving wheels and two trailing wheels.

Equivalent classifications edit

Other equivalent classifications are:

The UIC classification is refined to (1'B)B1' for a Mallet locomotive.

A similar wheel arrangement has been used for Garratt locomotives, but it is referred to as 2-4-0+0-4-2 since both engine units can pivot.

US examples edit

This articulated wheel arrangement was rare in North America; example was the Mallet locomotive. Most were built as logging locomotives, presumably to better negotiate the uneven (and often temporary) trackwork that characterized such operations. The added mechanical complexity was found to be of limited value, as reflected in their modest production and use.[1]

 
Columbia River Belt Line No. 7 "Skookum" during restoration outside the Garibaldi shops, January 2018.

There is one known surviving example: Columbia River Belt Line No. 7 "Skookum" (former Little River No. 126), built by Baldwin Locomotive Works in June 1909. It was retired and abandoned in place in the forest following a derailment in 1955. As of January 2023, it has been restored to operating condition following a 15 year rebuild at the Oregon Coast Scenic Railroad shop in Garibaldi, Oregon. The engine currently resides at the Niles Canyon Railway in Sunol California.[2][3][4][5]

New Zealand edit

ALCO Number 7 edit

Built by ALCO, this locomotive is a Mallet Compound engine, built for the Taupo Totara Timber Co for use on their 51-mile private tramway system, the Mokai Tramway between Putaruru and Mokai in the North Island. It is now preserved on the Glenbrook Vintage Railway, near Auckland, New Zealand and now carries the number 4. The engine is currently out of service awaiting overhaul, but can still be seen at the railway's Pukeoware workshops.

References edit

  1. ^ LaMassena, Robert (1982). Articulated Steam Locomotives of N. America. Sundance. p. 7. ISBN 0-913582-09-3.
  2. ^ "October 2018 | Trains Magazine".
  3. ^ "'Skookum' photo charter sold out; wait list started for second session | Trains Magazine".
  4. ^ "2022 steam locomotive list spring update". Trains. 6 July 2022. Retrieved 2023-01-06.
  5. ^ Walter, Tim (2022-04-06). "Skookum (Deep River Logging #7) | Steam Giants". Retrieved 2023-01-06.


whyte, notation, refers, railroad, steam, locomotive, that, leading, wheels, followed, sets, four, coupled, driving, wheels, trailing, wheels, contents, equivalent, classifications, examples, zealand, alco, number, referencesequivalent, classifications, editot. In Whyte notation 2 4 4 2 refers to a railroad steam locomotive that has two leading wheels followed by two sets of four coupled driving wheels and two trailing wheels Contents 1 Equivalent classifications 2 US examples 3 New Zealand 3 1 ALCO Number 7 4 ReferencesEquivalent classifications editOther equivalent classifications are UIC classification 1BB1 also known as German classification and Italian classification French classification 120 021 Turkish classification 23 23 Swiss classification 2 3 2 3 The UIC classification is refined to 1 B B1 for a Mallet locomotive A similar wheel arrangement has been used for Garratt locomotives but it is referred to as 2 4 0 0 4 2 since both engine units can pivot US examples editThis articulated wheel arrangement was rare in North America example was the Mallet locomotive Most were built as logging locomotives presumably to better negotiate the uneven and often temporary trackwork that characterized such operations The added mechanical complexity was found to be of limited value as reflected in their modest production and use 1 nbsp Columbia River Belt Line No 7 Skookum during restoration outside the Garibaldi shops January 2018 There is one known surviving example Columbia River Belt Line No 7 Skookum former Little River No 126 built by Baldwin Locomotive Works in June 1909 It was retired and abandoned in place in the forest following a derailment in 1955 As of January 2023 it has been restored to operating condition following a 15 year rebuild at the Oregon Coast Scenic Railroad shop in Garibaldi Oregon The engine currently resides at the Niles Canyon Railway in Sunol California 2 3 4 5 New Zealand editALCO Number 7 edit Built by ALCO this locomotive is a Mallet Compound engine built for the Taupo Totara Timber Co for use on their 51 mile private tramway system the Mokai Tramway between Putaruru and Mokai in the North Island It is now preserved on the Glenbrook Vintage Railway near Auckland New Zealand and now carries the number 4 The engine is currently out of service awaiting overhaul but can still be seen at the railway s Pukeoware workshops References edit LaMassena Robert 1982 Articulated Steam Locomotives of N America Sundance p 7 ISBN 0 913582 09 3 October 2018 Trains Magazine Skookum photo charter sold out wait list started for second session Trains Magazine 2022 steam locomotive list spring update Trains 6 July 2022 Retrieved 2023 01 06 Walter Tim 2022 04 06 Skookum Deep River Logging 7 Steam Giants Retrieved 2023 01 06 nbsp This steam locomotive related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title 2 4 4 2 amp oldid 1214617569, wikipedia, wiki, book, books, library,

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