SR Lord Nelson class

Specifications
Specifications
Configuration:;
• Whyte	4-6-0
• UIC	2′C h4
Gauge	4 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); 6 ft 3 in (1.905 m) (one-off modification on E859)
Length	69 ft 9+3⁄4 in (21.3 m)
Loco weight	83 long tons 10 cwt (187,000 lb or 84.8 t)
Tender weight	57 long tons 19 cwt (129,800 lb or 58.9 t)
Fuel type	Coal
Fuel capacity	5 long tons 0 cwt (11,200 lb or 5.1 t) (5.6 short tons)
Water cap.	5,000 imp gal (23,000 L; 6,000 US gal)
Firebox:
• Grate area	33 sq ft (3.1 m2)
Boiler pressure	220 lbf/in2 (1.52 MPa)
Cylinders	Four
Cylinder size	16+1⁄2 in × 26 in (419 mm × 660 mm)

Type and origin
Type and origin
Power type	Steam
Designer	Richard Maunsell
Builder	SR Eastleigh Works
Build date	1926–1929
Total produced	16

SR Lord Nelson class
SR Lord Nelson class
	850 "Lord Nelson"
Power type
Type and origin
Power type	Steam
Designer	Richard Maunsell
Builder	SR Eastleigh Works
Build date	1926–1929
Total produced	16
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0
• UIC	2′C h4
Gauge	4 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); 6 ft 3 in (1.905 m) (one-off modification on E859)
Length	69 ft 9+3⁄4 in (21.3 m)
Loco weight	83 long tons 10 cwt (187,000 lb or 84.8 t)
Tender weight	57 long tons 19 cwt (129,800 lb or 58.9 t)
Fuel type	Coal
Fuel capacity	5 long tons 0 cwt (11,200 lb or 5.1 t) (5.6 short tons)
Water cap.	5,000 imp gal (23,000 L; 6,000 US gal)
Firebox:
• Grate area	33 sq ft (3.1 m2)
Boiler pressure	220 lbf/in2 (1.52 MPa)
Cylinders	Four
Cylinder size	16+1⁄2 in × 26 in (419 mm × 660 mm)
Tractive effort
Performance figures
Tractive effort	33,510 lbf (149.06 kN); 35,298 lbf (157.01 kN) (E859 w/6 ft 3 in. driving wheels)
Operators
Career
Operators	Southern Railway; → British Railways;
Power class	BR: 7P
Numbers	SR:850-865, BR:30850-30865
Locale	Great Britain
Withdrawn	1961–1962
Preserved	850 Lord Nelson
Disposition	One preserved, remainder scrapped

The SR class LN or Lord Nelson class is a type of 4-cylinder 4-6-0 steam locomotive designed for the Southern Railway by Richard Maunsell in 1926. They were intended for Continental boat trains between London (Victoria) and Dover harbour, but were also later used for express passenger work to the South-West of England. Sixteen of them were constructed, representing the most powerful (although not the most successful) Southern 4-6-0 design. They were all named after famous admirals.

The class continued to operate with British Railways until withdrawn during 1961 and 1962. Only one example of the class – the first engine, Lord Nelson itself – has been saved from scrapping. This has been seen running on mainline tours and preserved railways throughout Britain.