BR Standard Class 4 4-6-0

The British Railways Standard Class 4 4-6-0 is a class of steam locomotives, 80 of which were built during the 1950s. Six have been preserved.
==Background==
The class was introduced in 1951. They were designed for mixed traffic use on secondary routes where the otherwise ubiquitous BR Standard Class 5 and their predecessors, the Black Fives, would be too heavy. They were essentially a tender version of the standard 4 2-6-4T, with similar characteristics to the GWR Manor Class, though unlike the Manors they were built to the universal loading gauge. They used the same running gear as the tank engine (with the leading bogie from the Standard Class 5), and substantially the same firebox, smokebox and boiler, although the boiler barrel was increased in length by 9 inches (229 mm).
Design work was done at Brighton by R. A. Riddles, with help from Swindon, Derby and Doncaster. Construction was at the BR Swindon Works.
The engine weighed 67.90 long tons (68.99 t; 76.05 short tons), was 60 ft 0 in (18.29 m) long, with 5 ft 8 in (1.727 m) diameter driving wheels. It had two cylinders of 18 inches (457 mm) diameter and 28 inches (711 mm) stroke operated at maximum boiler pressure of 225 lbf/in2 (1.55 MPa), to produce 25,515 lbf (113.5 kN) tractive effort. Its British Railways power classification was 4MT.
It normally used the standard BR2 or BR2A tender, which weighed 42.15 long tons (42.83 t; 47.21 short tons) and carried 3,500 imp gal (16,000 l; 4,200 US gal) of water and 6.00 long tons (6.10 t; 6.72 short tons) of coal. In this configuration its route availability was 4, almost universal over the British Railways network.
==In service==
The class was initially allocated to the London Midland Region (45) and the Western Region (20). The last 15 were allocated to the Southern Region. The Southern batch were built with BR1B tenders, which weighed 49.15 long tons (49.94 t; 55.05 short tons), and carried 4,725 imp gal (21,480 l; 5,674 US gal) of water and 7.00 long tons (7.11 t; 7.84 short tons) of coal. This reduced their route availability to 7, the same as the Standard Class 5.
Table of withdrawals
Year	Quantity inservice atstart of year	Quantitywithdrawn	Locomotive numbers 	Notes
1964	80 	2 	75001/67 	
1965	78 	11 	75000/03/05/07–08/22/25/28/38/72–73 	
1966	67 	20 	75011/14/23/31/36/44–45/49–51/53–54/56–57/63/65–66/69–70/79 	
1967	47 	37 	75002/04/06/10/12–13/15–18/24/26/29–30/33/35/37/39–40/42–43/46–47/52/55/58–61/64/68/71/74–78	
1968	10 	10 	75009/19–21/27/32/34/41/48/62 	
==Preservation==
Six members of the class survive. Two were purchased directly from BR (75027 & 75029); the remaining four were rescued from Woodham Brothers' scrapyard at Barry Island.
No member of the class is presently main line approved but three (75014, 75029 and 75069) have worked on the main line at various points in preservation. 75029 was passed to work on the main line between Grosmont and Whitby with occasional visits to Battersby during galas.
Preserved locomotives
Number & Name 	Tender Attached	Chimney Fitted	Built 	Withdrawn	Service life 	Home Base 	Owner 	Livery 	Status 	Image
75014 "Braveheart" 	BR2A 	Single 	Nov 1951 	Dec 1966 	15 years, 30 days 	Dartmouth Steam Railway 	Dartmouth Steam Railway 	BR Lined Black, Early Emblem	Operational 	
75027 	BR2A 	Single 	May 1954 	Aug 1968 	14 years, 3 months 	Bluebell Railway 	Bluebell Railway 	BR Lined Green 	Static Display 	
75029 "The Green Knight"	BR2A 	Double 	May 1954 	Aug 1967 	13 years, 3 months 	North Yorkshire Moors Railway 	North Yorkshire Moors Railway 	BR Lined Green, Late Crest 	Awating repairs to cracked firebox (2015)	
75069 	BR1B 	Double 	Sept 1955	Sept 1966	11 years 	Severn Valley Railway 	75069 Fund 	BR Lined Black, Late Crest 	Operational 	
75078 	BR1B 	Double 	Jan 1956 	Jul 1966 	10 years, 5 months 	Keighley and Worth Valley Railway	The Standard 4 Locomotive Preservation Society	BR Lined Black, Late Crest 	Operational 	
75079 	BR1B 	Double 	Jan 1956 	Nov 1966 	10 years, 10 months	Mid-Hants Railway 	Mid-Hants Railway Preservation Society 	N/A 	Under restoration 	
==Model railways==
Bachmann and Hornby have both recently released models of these engines in 00 gauge. Mainline Railways also released a OO gauge model of the Standard Class 4MT 4-6-0 in the 1970s, although this is no longer in production. In 1983, Mainline's model was reintroduced to their catalogue as locomotive 75033 in BR lined black.
== Gallery ==
File:Gloucester Eastgate 7 railway station 2117081 c5db7256.jpg|75022 at Gloucester Eastgate in April 1959.
File:Standard Class 4MT 4-6-0 75078 3 (40735890451).jpg
File:Windsor Hill 2118341 505f0875.jpg
File:BR Standard Class 4 4-6-0 73069 at Kidderminster on the SVR.jpg
File:75029 at Grosmont (2).jpg
File:P1200148-750x530.jpg
==References==
*A Detailed History of BR Standard Steam Locomotives, - Vol 2 - The 4-6-0 and 2-6-0 Classes. RCTS 
==External links==
*Southern E-group photo gallery
*75027 webpage at the Bluebell Railway
*75079 webpage at the Mid Hants Railway
Category:4-6-0 steam locomotives
Category:4-6-0 locomotives
Category:Steam locomotives
Category:Tender locomotives
Category:British Rail locomotives
Category:British Railways
Category:British locomotives
Category:British steam locomotives
Category:Swindon Works locomotives
Category:4 foot 8 1⁄2 inch gauge
Category:Standard gauge locomotives
Category:Ten-Wheeler Locomotives
Category:Built in 1951
Category:Built in 1952
Category:Built in 1953
Category:Built in 1954
Category:Built in 1955
Category:Built in 1956
Category:Built in 1957
Category:British Rail Standard Class locomotives