Highland Railway Clan Class
Encyclopedia
The Highland Railway
's Clan Class was a class of passenger 4-6-0
steam locomotive
s designed by Christopher Cumming. The design is derived from that of the slightly earlier Clan Goods
although the similarity is more visual than real.
They had 21 by cylinders outside with outside Walschaerts valve gear, 6 in 0 in (1.83 m) driving wheels and a boiler pressured to 175 lbf/in² (1.2 MPa). Weight was 62 tons 5 cwt (63.25 t) for the locomotive and 42 tons (42.7 t) for the tender. Piston valve diameter is given as 10 inches (quite large for the period), but they had the conventional short lap, short travel valves. Bearing in mind that they probably spent a large part of their time slogging uphill or coasting down this was probably not too important.
Total heating surface (including superheater) is given as 1723 sq ft (160.1 m²) and grate area as 25.5 sq ft (2.4 m²). The first four were built in 1919, and the remaining four in 1921.
Two survived into British Railways hands, but only Clan Mackinnon received its BR number.
Early in 1921 Clan Stewart was used for experiments with oil firing. They seem to have been successful, but was not applied to any other locomotives. Just when Clan Stewart reverted to coal operation does not seem to be recorded.
The LMS
classified them '4P'.
The Clan names were later reapplied to the BR standard class 6
.
Highland Railway
The Highland Railway was one of the smaller British railways before the Railways Act 1921; it operated north of Perth railway station in Scotland and served the farthest north of Britain...
's Clan Class was a class of passenger 4-6-0
4-6-0
Under the Whyte notation for the classification of steam locomotives, 4-6-0 represents the wheel arrangement of four leading wheels on two axles in a leading truck, six powered and coupled driving wheels on three axles, and no trailing wheels. This wheel arrangement became the second-most popular...
steam locomotive
Steam locomotive
A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...
s designed by Christopher Cumming. The design is derived from that of the slightly earlier Clan Goods
Highland Railway Clan Goods Class
The Highland Railway's Clan Goods class was a class of steam locomotive. They were designed by Christopher Cumming.The first four were built by Hawthorn Leslie on Tyneside, some sources claim they were delivered in 1917, others claim it was the following year. Four more were built in 1919...
although the similarity is more visual than real.
They had 21 by cylinders outside with outside Walschaerts valve gear, 6 in 0 in (1.83 m) driving wheels and a boiler pressured to 175 lbf/in² (1.2 MPa). Weight was 62 tons 5 cwt (63.25 t) for the locomotive and 42 tons (42.7 t) for the tender. Piston valve diameter is given as 10 inches (quite large for the period), but they had the conventional short lap, short travel valves. Bearing in mind that they probably spent a large part of their time slogging uphill or coasting down this was probably not too important.
Total heating surface (including superheater) is given as 1723 sq ft (160.1 m²) and grate area as 25.5 sq ft (2.4 m²). The first four were built in 1919, and the remaining four in 1921.
| HR Number | Name | LMS Number | BR number | Withdrawn | Notes |
|---|---|---|---|---|---|
| Clan Campbell Clan Campbell Clan Campbell is a Highland Scottish clan. Historically one of the largest, most powerful and most successful of the Highland clans, their lands were in Argyll and the chief of the clan became the Earl and later Duke of Argyll.-Origins:... |
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| Clan Fraser Clan Fraser Clan Fraser is a Scottish clan of French origin. The Clan has been strongly associated with Inverness and the surrounding area since the Clan's founder gained lands there in the 13th century. Since its founding, the Clan has dominated local politics and been active in every major military conflict... |
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| Clan Munro Clan Munro -Origins:The main traditional origin of the clan is that the Munros came from Ireland and settled in Scotland in the 11th century and that they fought as mercenary soldiers under the Earl of Ross who defeated Viking invaders in Rosshire... |
BR number not applied | ||||
| Clan Stewart | |||||
| Clan Chattan | |||||
| Clan Mackinnon Clan MacKinnon Clan Mackinnon or Clan Fingon is a Highland Scottish clan associated with the islands of Mull and Skye, in the Inner Hebrides.Popular tradition gives the clan a Dalriadic Gaelic origin. The 19th century historian W. F. Skene named the clan as one of the seven clans of Siol Alpin - who according to... |
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| Clan Mackenzie Clan MacKenzie Clan Mackenzie is a Highland Scottish clan, traditionally associated with Kintail and lands in Ross-shire.-Origins:The Mackenzies, a powerful clan of Celtic stock, were not among the clans that originated from Norman ancestry. Descendants of the long defunct royal Cenél Loairn of Dál Riata, they... |
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| Clan Cameron Clan Cameron Clan Cameron is a West Highland Scottish clan, with one main branch Lochiel, and numerous cadet branches. The Clan Cameron lands are in Lochaber and within their lands is the mountain Ben Nevis which is the highest mountain in the British Isles. The chief of the clan is customarily referred to as... |
Two survived into British Railways hands, but only Clan Mackinnon received its BR number.
Early in 1921 Clan Stewart was used for experiments with oil firing. They seem to have been successful, but was not applied to any other locomotives. Just when Clan Stewart reverted to coal operation does not seem to be recorded.
The LMS
London, Midland and Scottish Railway
The London Midland and Scottish Railway was a British railway company. It was formed on 1 January 1923 under the Railways Act of 1921, which required the grouping of over 120 separate railway companies into just four...
classified them '4P'.
The Clan names were later reapplied to the BR standard class 6
BR standard class 6
The Standard class 6, otherwise known as the Clan Class, was a class of 4-6-2 Pacific tender steam locomotive designed by Robert Riddles for use by British Railways. Ten locomotives were constructed between 1951 and 1952, with a further 15 planned for construction...
.