Caledonian Railway 72 Class

113 class No. 54471 at Dingwall in 1957

| Type and origin

Power type| Steam
Designer| William Pickersgill
Builder| St. Rollox Works (10)
Armstrong Whitworth (10)
North British Locomotive Co. (12)
Build date| May 1920 to December 1922
Total produced| 32
| Specifications

Configuration:
| ​
• Whyte| 4-4-0
• UIC| 2′B h2
Gauge| 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.| 3 ft 6 in (1.067 m)
Driver dia.| 6 ft 6 in (1,981 mm)
Wheelbase| 46 ft 10+3⁄4 in (14.29 m)
Length| 56 ft 4+1⁄2 in (17.18 m)
Height| 12 ft 10+1⁄2 in (3,924 mm)
Axle load| 19 long tons 18 cwt (44,600 lb or 20.2 t)
Adhesive weight| 39 long tons 15 cwt (89,000 lb or 40.4 t)
Loco weight| 61 long tons 5 cwt (137,200 lb or 62.2 t)
Tender weight| 46 long tons 10 cwt (104,200 lb or 47.2 t)
Total weight| 107 long tons 15 cwt (241,400 lb or 109.5 t)
Fuel type| Coal
Fuel capacity| 6 long tons 12 cwt (14,800 lb or 6.7 t)
Water cap.| 4,200 imp gal (19,000 L; 5,000 US gal)
Firebox:| ​
• Grate area| 17 sq ft (1.6 m2)
Boiler pressure| 180 psi (1.24 MPa)
Heating surface| 1,529 sq ft (142.0 m2) ​
• Firebox| 144 sq ft (13.4 m2)
Superheater:
| ​
• Type| Superheated
• Heating area| 200 sq ft (19 m2)
Cylinders| Two, inside
Cylinder size| 20.5 in × 26 in (521 mm × 660 mm)
Valve gear| Stephenson
Valve type| Piston valves
Valve travel| 9 in (229 mm)
| Performance figures

Tractive effort| 21,435 lbf (95.35 kN)
Factor of adh.| 4.15
| Career

Operators| CR • LMS
Class| CR: 72
Power class| LMS: 3P
Number in class| 32
Numbers| CR: 72-91, 66-71, 92-97
LMS: 14477-14508
BR: 54477-54508
Nicknames| "Pickersgill Bogies"
First run| May 1920
Last run| October 1, 1962
Withdrawn| 1953 (1), 1959-1962 (31)
Disposition| All scrapped
'72' class No. 14493 at Inverness Depot in 1948

The Caledonian Railway 72 Class was a class of 4-4-0 steam locomotives introduced by William Pickersgill for the Caledonian Railway (CR) in 1920. Thirty-two locomotives were built and all survived to be taken over by the London, Midland and Scottish Railway (LMS) in 1923 and by British Railways (BR) in 1948. The earlier 113 Class (introduced in 1916), of which 16 were produced, were similar but slightly smaller. These were the Caledonian's last express passenger locomotives, and technically, the last of the Dunalastair series, and were unofficially dubbed, Dunalastair V.[citation needed]

## Numbering[edit]

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

The two classes together totalled 48 locomotives. No. 54481 was scrapped after an accident at Gollafield Junction in 1953, the remainder were withdrawn between 1959 and 1962.[1]

## Dimensions[edit]

Figures given in this section are from BR Database. Figures given by Rail UK are slightly different.

### 72 Class[edit]

See box, top right. [2] [3]

### 113 Class[edit]

See table below. [4] [5]

Introduced: 1916
Total produced: 16
Locomotive weight: 61.25 long tons (62.23 t)
Boiler pressure: 175 psi (1.21 MPa)
Superheater: Yes
Cylinders: 20 in × 26 in (508 mm × 660 mm)
Driving wheel diameter: 6 ft 6 in (1,981 mm)
Valve gear: Stephenson
LMS/BR Power classification: 3P
Tractive effort: 19,833 lbf (88.22 kN)

## Preservation[edit]

Although no members of the class have been preserved, there are plans to construct a replica.[citation needed]

## See also[edit]

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

## References[edit]

Wikimedia Commons has media related to Caledonian Railway 72 Class.

1. ^ Casserley, H.C. and Johnston, S.W., Locomotives at the Grouping, No.3, London Midland and Scottish, Ian Allan, 1966, pp 144-145
2. ^ "BRDatabase - the Complete British Railways Locomotive Database 1948-1997". Brdatabase.info. Retrieved 21 June 2012.
3. ^ "Rail UK Steam Loco Class Information". Railuk.info. Retrieved 21 June 2012.
4. ^ "BRDatabase - the Complete British Railways Locomotive Database 1948-1997". Brdatabase.info. Retrieved 21 June 2012.
5. ^ "Rail UK Steam Loco Class Information". Railuk.info. Retrieved 21 June 2012.

* v
* t
* e

Caledonian Railway locomotives

Robert Sinclair (1847–1856)|

* 59 (2-2-2)
* 96
* 101
* 111

Benjamin Connor (1856–1876)|

* 59 (2-4-0)
* 552
* 600

George Brittain (1876–1882)|

* 1
* 130
* 140
* 152
* 179
* 485
* 486
* 670

Dugald Drummond (1882–1890)|

* 66
* 80
* 123
* 124
* 171
* 262
* 264
* 272
* 294
* 323

Hugh Smellie (1890)|

* Appointed 1 September 1890. Died 19 April 1891

John Lambie (1891–1895)|

* 1
* 13
* 19
* 211
* 538A

John F. McIntosh (1895–1914)|

* 29
* 43
* 49
* 55
* 92
* 139
* 140
* 179
* 184
* 439
* 498
* 611
* 652
* 711
* 721
* 766
* 782
* 812
* 879
* 900
* 903

William Pickersgill (1914–1923)|

* 60
* 72
* 113
* 159
* 191
* 300
* 431
* 944
* 956

Miscellaneous|

* Highland Railway River Class

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