SR L1 class

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SR L1 class
757, circa 1928
Type and origin Power type Steam Designer Richard Maunsell (development of SECR L class by Harry Wainwright) Builder North British Locomotive Company Serial number 23356–23370 Build date 1926 Total produced 15
Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B h2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 7 in (1.092 m) Driver dia. 6 ft 8 in (2.032 m) Length 56 ft 7+5⁄8 in (17.26 m) Loco weight 57 long tons 16 cwt (129,500 lb or 58.7 t) (64.7 short tons) Fuel type Coal Fuel capacity 5 t (4.9 long tons; 5.5 short tons) Water cap. 3,500 imp gal (15,911.3 L; 4,203.3 US gal) Firebox: ​  • Grate area 22+1⁄2 sq ft (2.09 m2) Boiler pressure 180 lbf/in2 (1.24 MPa) Heating surface: ​  • Firebox 154+1⁄2 sq ft (14.35 m2)  • Tubes 914 sq ft (84.9 m2)  • Flues 338+1⁄2 sq ft (31.45 m2)  • Total surface 1,407 sq ft (130.7 m2) Superheater: ​  • Type Maunsell  • Heating area 235 sq ft (21.8 m2) Cylinders Two, inside Cylinder size 19+1⁄2 in × 26 in (495 mm × 660 mm) Valve gear Stephenson Valve type piston valves Train brakes Vacuum
Performance figures Tractive effort 18,910 lbf (84,100 N)
Career Operators Southern Railway → British Railways Class SR: L1 Power class BR: 3P Numbers SR: A753–A759, A782–A879 → 1753–1759, 1782–1789 BR: 31753–31759, 31782–31789 Locale Southern Region Withdrawn 1959–1962 Disposition All scrapped

The Southern Railway L1 class was a class of 4-4-0 steam tender locomotives built for express passenger service on the South Eastern Main Line of the UK Southern Railway. They were designed by Richard Maunsell as a development of Harry Wainwright's L class.