Caledonian Railway 918 Class

Caledonian Railway 908 Class
Type and origin
Power type Steam
Designer John F. McIntosh
Builder St. Rollox
Build date 1906
Total produced 5
Specifications
Configuration 4-6-0
Gauge 4 ft 8 12 in (1,435 mm)
Driver dia. 5 ft 0 in (1.52 m)[1]
Loco weight 60tons 8cwt[1]
Boiler pressure 175psi[1]
Superheater not equipped
Cylinders Two, inside
Cylinder size 19 in × 26 in (483 mm × 660 mm)[1]
Valve gear Stephenson
Performance figures
Tractive effort 23,269 lbf (103.51 kN)[1]
Career
Operators CR  LMS
Class CR: 918
Power class LMS: 3F

The Caledonian Railway 918 Class were 4-6-0 steam tender locomotives designed by John F. McIntosh and built in 1906, at the Caledonian Railway's own St. Rollox Works.

Overview

McIntosh developed six different classes of 4-6-0 for the Caledonian Railway:[2]

The 55 class had been introduced in 1902, specifically for use on the Caledonian's Oban line, and the 918 class was a development of the 55 class which was intended for express goods traffic on the main line. Whereas the 55s featured a relatively small boiler, and very short tenders to keep within the length of the Oban shed turntable, the otherwise similar 918s had larger boilers and tenders.

Although built for freight service they were also used occasionally on passenger trains, and like all Caledonian 4-6-0s they were painted in the Railway's blue passenger livery.[2]

LMS ownership

The locomotives passed into the ownership of the London, Midland and Scottish Railway upon its formation in 1923, and were repainted into the LMS's unlined black freight livery.

They were displaced by new LMS standard locomotives such as the "Crab" 2-6-0s and were withdrawn for scrap between 1929 and 1930. Two of the boilers from the withdrawn 918s were transferred to 55 Class engines at that time, with the result that the receiving locomotives effectively became "quasi-918s" for their last few years.[2]

Numbering and Locomotive Histories

CR no. LMS no. Delivered Withdrawn
918 17900 07/1906 12/1930
919 17901 07/1906 12/1930
920 17902 08/1906 12/1930
921 17903 08/1906 05/1929
922 17904 09/1906 04/1930

source: BritishSteam[3]

References

  1. 1 2 3 4 5 Casserley, H. C. & Johnston, S.W. (1966), Locomotives at the Grouping 3: London Midland and Scottish, Ian Allan, p.182
  2. 1 2 3 Essery, Bob & Jenkinson, David (1986), An Illustrated History of L.M.S. Locomotives, Volume Three: Absorbed Pre-Group Classes, Northern Division, OPC, p.103
  3. "BritishSteam locomotive information". BritishSteam.com. Retrieved 2016-03-19.
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