Caledonian Railway 60 Class

{{Use dmy dates|date=February 2017}}

{{Use British English|date=February 2017}}

{{Infobox Locomotive

|name = Caledonian Railway 60 Class
(details for original CR batch)

|powertype = Steam

|image = Motherwell Locomotive Depot Caledonian '60' class 4-6-0 geograph-2741275-by-Ben-Brooksbank.jpg

|caption = Pickersgill/Hughes 4P 4-6-0 No. 14640 at Motherwell Locomotive Depot, 15 August 1948.

|designer = William Pickersgill

|builder = St. Rollox Works

|ordernumber = Y115, Y116

|serialnumber =

|buildmodel =

|builddate = November 1916 – April 1917

|totalproduction = 6

|rebuilder =

|rebuilddate =

|numberrebuilt =

|whytetype = 4-6-0

|uicclass = 2′C h2

|gauge = {{RailGauge|ussg|allk=on}}

|leadingdiameter = {{convert|3|ft|6|in|3|abbr=on}}

|driverdiameter = {{convert|6|ft|1|in|3|abbr=on}}

|minimumcurve =

|wheelbase =

|length =

|width =

|height =

|axleload =

|weightondrivers =

|locoweight = {{convert|75|LT|t ST|abbr=on}}

|tenderweight = {{convert|46.5|LT|t ST|abbr=on}}

|locotenderweight =

|tendertype =

|fueltype = Coal

|fuelcap =

|watercap =

|tendercap =

|sandcap =

|boiler =

|boilerpressure = {{convert|175|lbf/in2|MPa|2|abbr=on}}

|feedwaterheater =

|firearea =

|tubearea =

|fluearea =

|tubesandflues =

|fireboxarea =

|totalsurface = {{convert|1676|sqft|m2|abbr=on}}

|superheatertype = Robinson

|superheaterarea = {{convert|258.3|sqft|m2|abbr=on}}

|cylindercount = Two, outside

|cylindersize = {{convert|20|x|26|in|0|abbr=on}}

|valvegear = Stephenson

|valvetype = Piston valves

|valvetravel =

|valvelap =

|valvelead =

|transmission =

|maxspeed =

|poweroutput =

|tractiveeffort = {{convert|21795|lbf|kN|abbr=on}}

|factorofadhesion =

|trainheating =

|locobrakes =

|locobrakeforce =

|trainbrakes =

|safety =

|operator = {{ubl|Caledonian Railway|→ London, Midland and Scottish Railway|→ British Railways}}

|operatorclass = CR: 60

|powerclass = LMS: 4P

|numinclass =

|fleetnumbers = {{ubl|CR: 60–65|LMS: 14630–14655}}

|officialname =

|nicknames =

|axleloadclass =

|locale =

|deliverydate =

|firstrundate =

|lastrundate =

|withdrawndate = 1944 (1), 1946–1953

|preservedunits =

|restoredate =

|scrapdate =

|currentowner =

|disposition = All scrapped

}}

The Caledonian Railway 60 Class were 4-6-0 passenger engines designed by William Pickersgill and introduced in 1916. Six locomotives were constructed by the Caledonian Railway at its St. Rollox works between 1916 and 1917, all of which transitioned to LMS (London, Midland and Scottish Railway) ownership in 1923. An additional twenty locomotives, featuring slight design modifications, were produced under the direction of George Hughes for the LMS between 1925 and 1926.

While the 60 Class locomotives were robust and free-steaming, they were also unsophisticated and exhibited lethargic performance given their size. Although initially classified as passenger locomotives by the LMS, they were frequently deployed on goods trains later in their service life. This shift in usage earned them the nickname Greybacks, likely referencing their long, grimy boilers. Alternatively, the nickname may have been an insult coined by former Glasgow and South Western Railway enginemen, as "greyback" was an old term for a louse.Atkins, C. P. (1976), The Scottish 4-6-0 Classes, Ian Allan, p.53

Withdrawals from service began in 1944, but twenty-three locomotives remained operational when British Railways was formed in 1948. The final locomotives were retired in 1953, and none of the class were preserved, with all locomotives ultimately scrapped.