SR N15X class information

SR N15X Remembrance class [1]
A 1936 colour plate illustrating the general layout and livery of SR N15X number 2327 Trevithick from the Railway Magazine.
Type and origin Power type Steam Designer Richard Maunsell after L. B. Billinton Builder LBSCR Brighton Works Build date 1914, 1921–1922 Total produced 7 Rebuilder SR Eastleigh Works Rebuild date 1934–1936 Number rebuilt 7
Specifications Configuration: ​  • Whyte 4-6-0  • UIC 2′C h2 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 9 in (2.057 m) Length 66 ft 5+3⁄4 in (20.26 m) Loco weight 73.1 long tons (74.3 t; 81.9 short tons) Fuel type Coal Fuel capacity 5.0 long tons (5.1 t; 5.6 short tons) Water cap. 4,000 imp gal (18,000 L; 4,800 US gal) Boiler pressure 180 lbf/in2 (1.24 MPa) Cylinders Two, outside Cylinder size 21 in × 28 in (533 mm × 711 mm)
Performance figures Tractive effort 23,325 lbf (103.75 kN)
Career Operators Southern Railway → British Railways Class SR: N15X Power class BR: 4P Numbers SR: 2327–2333 BR: 32327–32333 Locale Southern Region Withdrawn 1955–1957 Disposition All scrapped

The SR N15X class or Remembrance class were a design of British 4-6-0 steam locomotives converted in 1934 by Richard Maunsell of the Southern Railway from the large LB&SCR L class 4-6-4 tank locomotives that had become redundant on the London–Brighton line following electrification.^[2] It was hoped that further service could be obtained from these locomotives on the Southern's Western Section, sharing the duties of the N15 class locomotives.^[3] The locomotives were named after famous Victorian engineers except for Remembrance, which was the LBSCR's memorial locomotive for staff members who died in the First World War.

In their new form the locomotives were similar in outline to the N15 class, though suffered from the expectation amongst crews that they were an improved version of this type. Despite this, their ability to accelerate well was put to good use on cross-country trains between main lines.^[3] The class saw service into nationalisation in 1948.^[4] All had been withdrawn by 1957, with none preserved.^[1]