| Highland Railway Cumming 4-4-0 | |
|---|---|
| Power type | Steam |
| Designer | Christopher Cumming |
| Builder | Hawthorn Leslie |
| Serial number | 3172–3173 |
| Build date | 1916 |
| Total produced | 2 |
| Configuration | 4-4-0 |
| UIC classification | 2′B |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver diameter | 6 ft 3 in (1.905 m) |
| Locomotive weight | 54 long tons 19½ cwt (125,400 lb/56.9 t) |
| Fuel type | Coal |
| Boiler pressure | 175 psi (1.21 MPa) |
| Cylinders | Two, outside |
| Cylinder size | 20 × 26 in (508 × 660 mm) |
| Valve gear | Walschaerts |
| Tractive effort | 20,627 lbf (91.8 kN) |
| Train brakes | Vacuum |
| Career | HR, LMS |
| Power class | LMS: 3P |
| Number | HR: 73–74, LMS: 14522–14523 |
| Withdrawn | 1934–1936 |
| 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
They had 20-by-26-inch (510 × 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/56.9 t).
| HR No. | Name | LMS No. | Withdrawn | Notes |
|---|---|---|---|---|
| 73 | Snaigow | 14522 | 1936 | |
| 74 | Durn | 14523 | 1935 |
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into London, Midland and Scottish Railway ownership in 1923, but neither lasted until nationalisation, as both were withdrawn and scrapped as non-standard engines in the mid-1930s.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.
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