Caledonian Railway 72 Class

Caledonian Railway

Industry	Railway transport
Founded	1845
Fate	Merged into London, Midland and Scottish Railway in 1923
Headquarters	Glasgow , Scotland, United Kingdom

Caledonian Railway 72 Class

File:Inverness Locomotive Depot geograph-2602407-by-Ben-Brooksbank.jpg

‘72’ class No. 14493 at Inverness Depot in 1948

The Caledonian Railway 72 Class consisted of 4-4-0 steam locomotives designed by William Pickersgill and introduced to the Caledonian Railway (CR) fleet starting in 1920. A total of thirty-two units were constructed, all of which remained in service through the transition to the London, Midland and Scottish Railway (LMS) ownership in 1923 and later under British Railways (BR) from 1948. Preceding this class was the 113 Class, launched in 1916 with sixteen locomotives built; these were comparable but slightly smaller in size. The 72 Class represented the final express passenger engines produced for the Caledonian Railway and are considered the last installment in the Dunalastair lineage, informally referred to as Dunalastair V.

Numbering

Year	Quantity	Manufacturer	Class	CR nos.	LMS nos.	BR nos.
1916	6	St. Rollox Works	113	113–116, 121, 124	14461–14466	54461–54466
1916	10	North British Locomotive Co. 21442–21451	113	928–937	14467–14476	54467–54476
1920	10	St. Rollox Works	72	72–81	14477–14486	54477–54486
1921	10	Armstrong Whitworth 111–120	72	82–91	14487–14496	54487–54496
1922	12	North British Locomotive Co. 22943–22954	72	66–71, 92–97	14497–14508	54497–54508

Combined, these two classes comprised a total of forty-eight locomotives. Locomotive number 54481 was dismantled following an incident at Gollafield Junction in 1953; the rest were retired from service between the years 1959 and 1962.

Dimensions

The specifications presented here are sourced from the BR Database, with slight variations noted in figures from Rail UK.

72 Class

Refer to the information box located at the top right for detailed specifications.

113 Class

Refer to the table below for detailed dimensions.

• Year introduced: 1916
• Total units built: 16
• Locomotive weight: 61.25 long tons (62.23 t)
• Boiler pressure: 175 psi (1.21 MPa)
• Equipped with superheater: Yes
• Cylinder dimensions: 20 in × 26 in (508 mm × 660 mm)
• Diameter of driving wheels: 6 ft 6 in (1,981 mm)
• Valve gear type: Stephenson
• LMS/BR power classification: 3P
• Tractive effort: 19,833 lbf (88.22 kN)

Preservation

While none of the original locomotives from this class have survived into preservation, initiatives have been proposed to build a faithful replica as of June 2012.

See also

• Locomotives of the Caledonian Railway
• Locomotives of the London, Midland and Scottish Railway