BR Standard Class 4 2-6-0

BR Standard Class 4 2-6-0

76040 at Water Orton in 1965
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 classification 1′C h2
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Leading wheel
diameter		 3 ft 0 in (0.914 m)
Driver diameter 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)
BR1B tender: 17.10 long tons (17.37 t)
Weight on drivers 50.45 long tons (51.26 t)
Locomotive weight 59.75 long tons (60.71 t)
Tender weight BR1B: 49.15 long tons (49.94 t)
BR2/BR2A: 42.15 long tons (42.83 t)
Tender type BR1B (17), BR2 (45), BR2A (53)
Fuel type Coal
Fuel capacity BR1B: 7.00 long tons (7.11 t)
BR2/BR2A: 6.00 long tons (6.10 t)
Water capacity 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)
Boiler BR7
Boiler pressure 225 psi (1.55 MPa)
Firegrate area 23 sq ft (2.1 m2)
Heating surface:
– Tubes and flues		 1,075 sq ft (99.9 m2)
– Firebox 131 sq ft (12.2 m2)
Superheater 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
adhesion		 4.68
Career
Operator(s) British Railways
Power class 4MT
Number(s) 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Withdrawn May 1964 – December 1967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.

Design and construction

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.[1]

Operation

With its 5-foot-3-inch (1.600 m) diameter driving wheels this sixth of the BR standard designs was clearly biased towards freight working. An axle-loading of only 16 tons 15 cwt meant its route availability was virtually unrestricted. Batches were allocated to every BR region except the Western.

Scottish Region

Thirty-five units were allocated to the Scottish Region, used on the Waverley Line between Carlisle and Hawick. Others appeared on the 'Port Road' from Dumfries to Stranraer. The Scottish examples were mainly concentrated in Ayrshire and around Glasgow, and at one time Corkerhill depot was home to ten of the class. Five units were based in Aberdeen and three went to Thornton in Fife.

Southern Region

The Southern moguls (originally 37) were also concentrated in one area around Eastleigh, Southampton and Bournemouth. They were used between Portsmouth, Salisbury and Cardiff, Reading to Redhill, Brighton to Bournemouth and over the Swanage branch. Their most celebrated duty was the London Waterloo to Lymington boat train. However this had nothing to do with the engines' capabilities; it was simply that among tender engines only a 2-6-0 or 4-4-0 could fit on the turntable at Brockenhurst. In the last few years of steam operation on the 'Southern' a few examples were allocated to Guildford shed before moving on to Feltham shed in S.W. London.

All 17 locomotives equipped with the BR1B high-sided tender were allocated to the Southern Region. The BR1B tender had a higher axle load than the locomotives.

North Eastern Region

At first the North Eastern Region scattered its 13-strong allocation far and wide: Darlington, Gateshead, Hull, Sunderland and York. Later all were concentrated at either Kirkby Stephen or West Auckland to work over the Stainmore route whose viaducts had severe weight restrictions. Like their small cousins the 2MT 2-6-0 class the Moguls were ideal for working the line. They worked coal trains as well as passenger services and were a regular choice for excursions from Tyneside to the Lancashire coast resorts.

London Midland Region

Apart from a pair allocated to Leicester, most of the London Midland Region's batch of 15 spent their working lives in the Liverpool, Manchester and Preston areas.

Eastern Region

76079 on the North Norfolk Railway

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.

Accidents and incidents

Preservation

Four examples have been saved:

Models

The erstwhile Kitmaster company produced an unpowered polystyrene injection moulded model kit for 00 gauge. In late 1962, the Kitmaster brand was sold by its parent company (Rosebud Dolls) to Airfix, who transferred the moulding tools to their own factory; they re-introduced some of the former Kitmaster range, including this locomotive. In time, the moulding tools passed on to Dapol who have also produced the model kit.[3]

Bachmann produces a ready-to-run model in both 00 and N gauge.[4]

Sound

Footnotes

  1. ↑ Rear cylinder cover SL/SW/35 being superseded by SL/SW/666 and front cylinder cover SL/SW/85 being superseded by SL/SW/667 for renewals from September 1955
  2. ↑ 2.0 2.1 2.2 Bishop, Bill (1984). Off the Rails. Southampton: Kingfisher. pp. 55–65. ISBN 0 946184 06 2.
  3. ↑ Knight, Stephen (1999). Let's Stick Together: An Appreciation of Kitmaster and Airfix Railway Kits. Clopthill: Irwell Press. ISBN 1-871608-90-2.
  4. ↑ http://www.bachmann.co.uk/image_box.php?image=images1/branchline/32-952A.jpg&cat_no=32-952A&info=33&width=650&height=260

Bibliography

External links

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BR Standard Class 4 2-6-0.