| Highland Railway Cumming 4-4-0 |
|---|
| Type and origin |
|---|
| Power type | Steam |
|---|
| Designer | Christopher Cumming |
|---|
| Builder | Hawthorn Leslie |
|---|
| Serial number | 3172–3173 |
|---|
| Build date | 1916 |
|---|
| Total produced | 2 |
|---|
|
| Specifications |
|---|
Configuration:
| |
|---|
| • Whyte | 4-4-0 |
|---|
| • UIC | 2′B |
|---|
| Gauge | 4 ft 8+1⁄2 in (1,435 mm) |
|---|
| Leading dia. | 3 ft 3 in (0.991 m) |
|---|
| Driver dia. | 6 ft 3 in (1.905 m) |
|---|
| Loco weight | 54 long tons 19+1⁄2 cwt (125,400 lb or 56.9 t) |
|---|
| Fuel type | Coal |
|---|
| Boiler | 4 ft 8+9⁄16 in (1.44 m) diameter |
|---|
| Boiler pressure | 175 psi (1.21 MPa) |
|---|
| Heating surface | 1,140 sq ft (106 m2) |
|---|
Superheater:
| |
|---|
| • Type | Robinson |
|---|
| • Heating area | 180 sq ft (17 m2) |
|---|
| Cylinders | Two, outside |
|---|
| Cylinder size | 20 in × 26 in (508 mm × 660 mm) |
|---|
| Valve gear | Walschaerts |
|---|
| Valve type | Inside admission piston valves |
|---|
| Train brakes | Vacuum |
|---|
|
|
| Career |
|---|
| Operators | HR, LMS |
|---|
| Power class | LMS: 3P |
|---|
| Numbers | HR: 73–74,
LMS: 14522–14523 |
|---|
| Withdrawn | 1935–1936 |
|---|
| Disposition | Both scrapped |
|---|
|
The Highland Railway Cumming 4-4-0 class was a pair of 4-4-0 steam locomotives designed by Christopher Cumming, the Locomotive Superintendent of the Highland Railway
Dimensions
They had 20-by-26-inch (510 mm × 660 mm) outside cylinders with Walschaerts valve gear, 6 ft 3 in (1.905 m) driving wheels and a boiler pressed to 175 lbf/in2 (1.21 MPa). Weight was a half-hundredweight short of 56 long tons (125,400 lb or 56.9 t).
Numbering
Table of engines | HR No. | Name | LMS No. | Withdrawn | Notes |
| 73 | Snaigow | 14522 | April 1936 | |
| 74 | Durn | 14523 | April 1935 | |
Transfer to LMS
Both survived into London, Midland and Scottish Railway ownership in 1923, but neither lasted until nationalisation, as both were withdrawn and scrapped as non-standard engines in the mid-1930s. The LMS had classed them as 3P.
References
- Baxter, Bertram (1984). Baxter, David (ed.). British Locomotive Catalogue 1825–1923, Volume 4: Scottish and remaining English Companies in the LMS Group. Ashbourne, Derbyshire: Moorland Publishing Company.
- Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. p. 146. ISBN 0-7110-0554-0.
