SR Lord Nelson Class 850 Lord Nelson

Southern Railway (SR) No. 850 Lord Nelson (originally E850, BR no. 30850) is a preserved British steam locomotive of the Lord Nelson class. She forms part of the United Kingdom's National Railway Collection.

850 Lord Nelson
850 Lord Nelson seen in preservation, in May 2007
Type and origin
Power typeSteam
DesignerRichard Maunsell
BuilderEastleigh Works
Build date1926
Websitecollection.sciencemuseum.org.uk/objects/co205792/southern-railway-lord-nelson-steam-locomotive
Specifications
Configuration:
​
 • Whyte4-6-0
 • UIC2′C h4
Gauge4 ft 8 1⁄2 in (1,435 mm) standard gauge
Leading dia.3 ft 1 in (0.940 m)
Driver dia.6 ft 7 in (2.007 m)
Length69 ft 9 3⁄4 in (21.3 m)
Total weight142 long tons 6 cwt (318,800 lb or 144.6 t) (159.4 short tons)
Fuel typeCoal
Fuel capacity5 long tons 0 cwt (11,200 lb or 5.1 t) (5.6 short tons)
Water cap5,000 imp gal (23,000 l; 6,000 US gal)
Firebox:
 • Firegrate area		33 sq ft (3.1 m2)
Boiler pressure220 lbf/in2 (1.52 MPa)
CylindersFour
Cylinder size16 1⁄2 in × 26 in (419 mm × 660 mm)
Performance figures
Tractive effort33,510 lbf (149.06 kN)
Career
Operators
ClassLord Nelson class]
Power classBR: 7P
Numbers850
Official nameLord Nelson
LocaleGreat Britain
As E850 Lord Nelson, with an indicator shelter for prototype testing, circa 1926-1927

Overview
30850 at Bournemouth MPD in 1958

850 was built at Eastleigh Works in 1926 to a design by R E L Maunsell, as the prototype for the 16-strong Lord Nelson class, and named after Horatio Nelson.

The Southern Railway became part of British Railways (BR) in 1948 through nationalisation, and was renumbered 30850. Under BR the class were given the power classification 7P. She was withdrawn in August 1962. She was preserved as part of the National Railway Collection, and is the sole survivor of the class. She has run in preservation, including on the main line, where her TOPS number is 98750. Her boiler certification expired in 2015.


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