LSWR H15 class

LSWR H15 class[1][page needed]
Official 1914 LSWR works photograph of Urie H15 class mixed-traffic locomotive No. 483 at Eastleigh. Smoke deflectors were fitted during the early 1930s.
Type and origin Power type Steam Designer Robert Urie Builder SR Eastleigh Works Build date 1914 (11) 1924–1925 (15) Total produced 26
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 7 in (1.092 m) Driver dia. 6 ft 0 in (1.829 m) Length 65 ft 6+3⁄4 in (19.98 m) Loco weight Various – 79 long tons 19 hundredweight (81.2 t) to 82 long tons 1 hundredweight (83.4 t) Fuel type Coal Fuel capacity 5 long tons (5.1 t; 5.6 short tons) Water cap. 5,000 imp gal (23,000 L; 6,000 US gal) Boiler pressure New: 180 psi (1.24 MPa) Rebuilt E14: 175 psi (1.21 MPa) Cylinders Two, outside Cylinder size 21 in × 28 in (533 mm × 711 mm)
Performance figures Tractive effort 26,240 lbf (116.72 kN)
Career Operators London and South Western Railway → Southern Railway → British Railways Class LSWR/SR: H15 Power class LSWR / SR: A BR: 4MT, later 4P5F Numbers LSWR: 335, 482–491 SR: E330–E335, E473–E478, E482–E492, E521–E524 → 330–335, 473–478, 482–492, 521–524 BR: 30330–30335, 30473–30478, 30482–30491, 30521–30524 Nicknames Chonker, "Junior King Arthurs", "Cathedrals" Locale Southern Region Withdrawn 1955–1961 Disposition All scrapped

The LSWR/SR H15 class was a class of 2-cylinder 4-6-0 steam locomotives designed by Robert Urie for mixed-traffic duties on the LSWR. Further batches were constructed by Richard Maunsell for the Southern Railway after 1923. They were given the nickname of "Junior King Arthur" due to the size of their driving wheels, with those on the S15 and their N15 counterparts being 5 ft 7 in (1.70 m) and 6 ft 7 in (2.01 m) diameters respectively.^[2]