BR Standard Class 4 2-6-0
76040 at Water Orton in 1965
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| Type and origin | |
|---|---|
| Power type | Steam |
| Designer | R. A. Riddles |
| Builder | BR Horwich (45) Doncaster (25) Derby Works (45) |
| Build date | December 1952 – November 1957 |
| Total produced | 115 |
| Specifications | |
|---|---|
| Configuration | 2-6-0 |
| UIC class | 1′C h2 |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Leading dia. | 3 ft 0 in (0.914 m) |
| Driver dia. | 5 ft 3 in (1.600 m) |
| Length | 60 ft 0 in (18.29 m) |
| Width | 8 ft 9 1⁄2 in (2.68 m) |
| Height | 13 ft 0 in (3.96 m) |
| Axle load |
Loco: 16.95 long tons (17.22 t; 18.98 short tons) BR1B tender: 17.10 long tons (17.37 t; 19.15 short tons) |
| Adhesive weight | 50.45 long tons (51.26 t; 56.50 short tons) |
| Loco weight | 59.75 long tons (60.71 t; 66.92 short tons) |
| Tender weight | BR1B: 49.15 long tons (49.94 t; 55.05 short tons) BR2/BR2A: 42.15 long tons (42.83 t; 47.21 short tons) |
| Tender type | BR1B (17), BR2 (45), BR2A (53) |
| Fuel type | Coal |
| Fuel capacity | BR1B: 7.00 long tons (7.11 t; 7.84 short tons) BR2/BR2A: 6.00 long tons (6.10 t; 6.72 short tons) |
| Water cap | BR1B: 4,250 imp gal (19,300 l; 5,100 US gal) BR2/BR2A: 3,500 imp gal (16,000 l; 4,200 US gal) |
| Firebox: • Firegrate area |
23 sq ft (2.1 m2) |
| Boiler | BR7 |
| Boiler pressure | 225 psi (1.55 MPa) |
| Heating surface: • Tubes and flues |
1,075 sq ft (99.9 m2) |
| • Firebox | 131 sq ft (12.2 m2) |
| Superheater: |
|
| • Heating area | 247 sq ft (22.9 m2) |
| Cylinders | Two, outside |
| Cylinder size | 17.5 in × 26 in (444 mm × 660 mm) |
| Performance figures | |
|---|---|
| Tractive effort | 24,170 lbf (107.5 kN) |
| Factor of adh. | 4.68 |
| Career | |
|---|---|
| Operators | British Railways |
| Power class | 4MT |
| Numbers | 76000–76114 |
| Axle load class | Route Availability 4 |
| Withdrawn | May 1964 – December 1967 |
| Disposition | Four preserved, remainder scrapped |
The BR Standard Class 4 2-6-0 is a class of steam locomotive designed by Robert Riddles for British Railways (BR). 115 locomotives were built to this standard.
The class was designed at the ex-LNER works at Doncaster which was also responsible for building 25 of the 115-strong class. The remaining 90 were split between Horwich and Derby Works.
The last in the series, No.76114, was also the final steam engine to be constructed at the 'Plant' (as Doncaster works was known). The Standard Four Mogul was essentially a standardised version of the LMS Ivatt Class 4, and was primarily intended for freight use.
Although a BR Standard, the 4 2-6-0 class did not have the same design of wheels as the Swindon-built 82XXX and 77XXX Class 3 engines which also had 5-foot-3-inch (1.600 m) driving wheels, yet all three locomotive classes share the same cylinder casting.
The cylinder covers of engines built early in the programme of construction were fitted with "screw-in" type pressure relief valves. From September 1955 revised cylinder covers were introduced for renewals incorporating "bolt-on" type pressure relief valves.
With its 5-foot-3-inch (1.60 m) diameter driving wheels this sixth of the BR standard designs was clearly biased towards freight working. An axle-loading of only 16 long tons 15 cwt (37,500 lb or 17 t) meant its route availability was virtually unrestricted. Batches were allocated to every BR region except the Western.
The Eastern Region divided its 15 between two London depots. Five went to Stratford on the ex-Great Eastern section, and the remainder to the one-time Great Central depot at Neasden. Made redundant by dieselisation the Stratford engines were transferred to the Southern and arrived at Brighton. The Neasden engines also in due course departed the capital, in this case for Chester and ex-Cambrian Railways territory. One Eastern locomotive was 76034 which was fitted with a tablet catcher for running over the M&GN lines in East Anglia. 76079 has visited the North Norfolk Railway in preservation times.
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