The Highland Railway O Class locomotives were built as 2-4-0T

tank engine A tank locomotive is a steam locomotive which carries its water in one or more on-board water tanks, instead of a more traditional tender. Most tank engines also have bunkers (or fuel tanks) to hold fuel; in a tender-tank locomotive a tender h ...

s, but were soon rebuilt as 4-4-0Ts. They were designed by David Jones for Scottish Railway companies and three were built at the company's Lochgorm Works in 1878 and 1879.

Dimensions

They had coupled wheels, outside cylinders and weight (in original condition) of 36 tons.

Numbering

Rebuilding

They were rebuilt as 4-4-0Ts in 1881–82 due to trouble with the single leading axle.

Transfer to LMS

All three were still in service in 1923, although relegated to shunting duties, and they were transferred to the

London, Midland and Scottish Railway The London, Midland and Scottish Railway (LMSIt has been argued that the initials LMSR should be used to be consistent with London and North Eastern Railway, LNER, Great Western Railway, GWR and Southern Railway (UK), SR. The London, Midland an ...

(LMS) at the

Grouping Grouping generally refers to the creation of one or more groups, or to the groups themselves. More specifically, grouping may refer to: * Shot grouping in shooting sports and other uses of firearms * the use of symbols of grouping in mathemati ...

Withdrawal

The three locomotives were withdrawn and scrapped between 1928 and 1933.

References

* * *H. A. Vallance (1938) ''The Highland Railway'' {{Highland Railway locomotives O Class 4-4-0T locomotives 1B n2t locomotives 2′B n2t locomotives Railway locomotives introduced in 1878 Standard-gauge steam locomotives of Great Britain Scrapped locomotives