| GWR 4800 class (later 1400 class) | |
|---|---|
| 4866, one of the four preserved 1400 Class 0-4-2T | |
| Power type | Steam |
| Builder | GWR Swindon Works |
| Order number | Lots 279, 287, 288 |
| Build date | 1932–1936 |
| Total produced | 75 |
| Configuration | 0-4-2T |
| UIC classification | B1 nt |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver diameter | 5 ft 2 in (1.575 m) |
| Trailing wheel diameter |
3 ft 8 in (1.118 m) |
| Wheelbase | 15 ft 6 in (4.72 m) |
| Length | 29 ft 11 in (9.12 m) |
| Width | 8 ft 7 in (2.62 m) |
| Height | 12 ft 6 1⁄4 in (3.82 m) |
| Axle load | 13 tons 18 cwt (31,100 lb or 14.1 t) full |
| Weight on drivers | 27 tons 8 cwt (61,400 lb or 27.9 t) full |
| Locomotive weight | 41 tons 6 cwt (92,500 lb or 42.0 t) full |
| Fuel type | Coal |
| Water capacity | 800 imp gal (3,600 l; 960 US gal) |
| Boiler pressure | 165 psi (1.14 MPa) |
| Firegrate area | 12.8 sq ft (1.19 m2) |
| Heating surface: Tubes |
869.8 sq ft (80.81 m2) |
| Heating surface: Firebox |
83.2 sq ft (7.73 m2) |
| Superheater type | None |
| Cylinders | Two, inside |
| Cylinder size | 16 × 24 in (406 × 610 mm) |
| Valve gear | Stephenson |
| Valve type | Slide valves |
| Tractive effort | 13,900 lbf (62 kN) |
| Train heating | Steam |
| Train brakes | Vacuum |
| Career | GWR » BR |
| Class | 4800, later 1400 |
| Power class | GWR: Unclassified, BR: 1P |
| Number | 4800–4874, later 1400–1474 |
| Axle load class | GWR: Unclassified |
| Withdrawn | 1956–1965 |
| Preserved | 1420, 1442, 1450, 1466 |
| Disposition | Four preserved, remainder scrapped |
The GWR 1400 Class is a class of steam locomotive designed by the Great Western Railway for branch line passenger work. It was originally classified as the 4800 Class when introduced in 1932, and renumbered in 1946.
Although credited to Collett, the design dated back to 1868 with the introduction of the George Armstrong 517 class.
Contents |
Like the 48xx/14xx, the 517 Class was a lightweight loco for branchline work; it was built at Wolverhampton Works between 1868 and 1885.
In this period evolutionary changes included:
Later gradual changes included: Belpaire fireboxes, boilers rated at 165psi as opposed to 150 psi, full cabs, extended bunkers and the progressive conversion of short wheelbase locos to 15' or 15' 6". From 1924 onwards, several were converted to run with an autocoach, and in this configuration were the direct ancestors of the 48xx class.
In this form, the updated 517's were but a small step away from the 48xx. The wheelbase was still 15' 6", the boiler still rated at only 165 psi, and the wheels 5' 2" and 3' 8". New was the Collett-style cab and bunker and the boiler nominally to a new design. A three bar crosshead was added to the motion. This was a 1924 innovation introduced with the GWR 5600 Class and also seen in the 1930s-built 54xx, 64xx and 74xx classes.
After the War, all the 4800's were renumbered in the 14xx series in order that some of the 2800 Class 2-8-0s, rebuilt for oil-firing, could be renumbered in the 48xx series.
The twenty 1933-built 5800 Class locos were almost identical. The defining feature between the two classes of locomotive was that the 48xx was fitted for autotrains with a mechanical system linking them and the autocoach. The autocoach was a specialist coach, designed for this purpose, which could also be used with the 517's, the GWR 5400 Class, the GWR 6400 Class and the older GWR 2021 Class. In later life, lack of auto gear was the cause of earlier scrapping of the newer locos as there was no work for them. They were all gone by 1959.
The auto-fitted locos fared little better; scrapping commenced in 1956 and all were withdrawn by early 1965. By the early 1960s several had been 'in store' (parked in an out-of-the-way siding with a tarpaulin over the chimney) for some time, being occasionally steamed to replace failed diesels.
Four examples have been preserved, all late withdrawals from service in the 1963-1965 period. All went direct to preservation from British Railways in relatively good condition. The current location of the preserved examples is as follows:
Known affectionately as The Tivvy Bumper, 1442 hauled the last train to Tiverton in October 1965.[1]
A fictional 1400 class locomotive (Oliver the Western Engine) appears in The Railway Series of children's books written by the Rev. W. Awdry, and in the spin-off TV series (Thomas the Tank Engine and Friends).
Two of these engines (GWR 1401 and GWR 1462) played prominent roles in the film The Titfield Thunderbolt, the first (1401) as the main locomotive of the Titfield–Mallingford branch, and the second (1462) as a stolen locomotive.
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