LSWR 700 class
|LSWR 700 class (as built)|
No. 30355 on Feltham locomotive depot, May 1959
|Builder||Dübs & Co.|
|UIC classification||C n2|
|Driver diameter||61 in (1.549 m)|
|Locomotive weight||42.75 long tons (43.44 t)|
|Tender capacity||coal: 4 long tons (4.1 t);
water: 3,500 imp gal (16,000 l)
|Boiler pressure||175 psi (1.21 MPa)|
|Firegrate area||20.25 sq ft (1.881 m2)|
|1,068 sq ft (99.2 m2)|
|– Firebox||124 sq ft (11.5 m2)|
|Cylinder size||18½×26 in
|Tractive effort||22,487 lbf (100.03 kN)|
|Power class||LSWR / SR: C|
|Number in class||30|
|Disposition||All rebuilt with superheaters|
|LSWR 700 class (after superheating)|
|Only details that changed are shown here|
|UIC classification||C h2|
|Locomotive weight||46.70 long tons (47.45 t)|
|Boiler pressure||180 psi (1.24 MPa)|
|860 sq ft (80 m2)|
|– Firebox||117 sq ft (10.9 m2)|
|Superheater type||Eastleigh (11); later all Maunsell|
|Superheater area||Eastleigh: 167 sq ft (15.5 m2); Maunsell 182 sq ft (16.9 m2)|
|Tractive effort||23,500 lbf (105 kN)|
|Power class||LSWR / SR: C
BR: 4F, later 3F
The LSWR 700 class was a class of 30 0-6-0 steam locomotives designed for freight work. The class was designed by Dugald Drummond in 1897 for the London and South Western Railway in England and built by Dübs and Company at that company's Queen's Park works at Polmadie, Glasgow, Scotland.
The class was originally numbered 687–716 but the year after delivery numbers 702–716 were given new numbers vacated by engines that had been withdrawn. The locomotives gained the nickname 'Black Motor' early in their career. They were well designed and had few major modifications during the existence of the fleet – the exception being fitted with superheaters from 1919 to 1929, which required the fitting of an extended smokebox. They shared many standard parts with Drummond's other designs (including sharing boilers with the M7 class).
Construction and numbering
|1897||Dübs & Co. 3510–3539||
Nos. 702–716 were renumbered by the LSWR between June and August 1898, becoming 306, 308, 309, 315, 317, 325–327, 339, 346, 350, 352, 355, 368, 459 respectively. In June 1912, no. 459 was renumbered again, to 316.
Soon after the locomotives passed to Southern Railway (SR) ownership, their LSWR numbers were prefixed "E" to denote Eastleigh Works - this was done to distinguish similarly-numbered locomotives from the other constituents of the SR; thus, LSWR no. 687 became SR no. E687. These prefixes were dropped from mid-1931. In the meantime, there had been a proposal (prepared in March 1927) to renumber some classes into continuous blocks: the 700 class were allocated the series E336–9, E369–379 and E686–701 but none were actually renumbered, and the plan was cancelled in December 1927.
The 700s remained intact as a class through SR ownership from 1923 to 1947. The locomotives passed to British Railways (BR) in 1948 and BR increased the former LSWR/SR numbers by 30000.
Accidents and incidents
- On 9 August 1957, locomotive No 30688 was in a head-on collision with a train formed of two electric multiple units at Staines, Middlesex after the latter departed against a danger signal.
The first to be withdrawn was No. 30688 in September 1957, with the second, No. 30352, following in June 1959 and then the 3rd, No. 30687, in September 1960. The final seven were all withdrawn by British Railways in December 1962.
None were saved for preservation.
- Bradley, D.L. (1965). Locomotives of the L.S.W.R.: Part 1. Kenilworth: RCTS.
- Bradley, D.L. (1967). Locomotives of the L.S.W.R.: Part 2. Kenilworth: RCTS.
- Haresnape, Brian; Rowledge, Peter (October 1982). Drummond Locomotives, A Pictorial History. Shepperton, Surrey, UK: Ian Allan Ltd. ISBN 0-7110-1206-7. DX/1082.
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