Caledonian 711 Class

The Caledonian Railway 711 Class was a series of inside-cylinder 0-6-0 goods locomotives designed by John Lambie, Locomotive Superintendent of the Caledonian Railway from 1891 to 1895 following the departure of Dugald Drummond. Introduced in 1890 — the year of Drummond's departure — or shortly after under Lambie's tenure, the 711 Class continued the established Caledonian pattern of inside-cylinder goods engines while incorporating Lambie's own detail preferences in boiler and valve gear design.

John Lambie had worked under Drummond at St Rollox and was well acquainted with the design principles of the Caledonian goods fleet. His own 711 Class retained the 0-6-0 wheel arrangement, inside cylinders, and 5 ft coupled wheels that had characterised the Drummond goods types, but Lambie favoured slightly different boiler proportions and made detail changes to the valve events and steam passages that he believed improved thermal efficiency. The Westinghouse air brake was retained.

The 711 Class worked Caledonian goods and mineral traffic through the 1890s and into the Caledonian and LMS eras. None was preserved, representing the typical fate of the Victorian goods engine that gave long, reliable, and unremarkable service before quiet scrapping.