LSWR O2 class

LSWR/SR O2[1]
W25 Godshill at Ryde St John's Road loco shed
Type and origin Power type Steam Designer William Adams Builder LSWR Nine Elms Works Build date 1889–1896 Total produced 60
Specifications Configuration: ​  • Whyte 0-4-4T  • UIC B2′ n2t Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 4 ft 10 in (1.473 m) Trailing dia. 36 in (0.914 m) Length 30 ft 8.5 in (9.360 m) Loco weight 48.40 long tons (49.18 t; 54.21 short tons) Fuel type Coal Fuel capacity 1.50 long tons (1.52 t; 1.68 short tons); later 3.25 long tons (3.30 t; 3.64 short tons) Water cap. 800 imp gal (3,600 L; 960 US gal) Boiler pressure 160 psi (1.10 MPa) Cylinders Two, inside Cylinder size 17+1⁄2 in × 24 in (444 mm × 610 mm)
Performance figures Tractive effort 17,235 lbf (76.67 kN)
Career Operators London and South Western Railway, Southern Railway, British Railways Class LSWR: O2 SR: O2 Power class Isle of Wight: B BR: 0P Locale Great Britain Withdrawn 1933 – 1967 Disposition One preserved, remainder scrapped

The LSWR O2 class is a class of 0-4-4T steam locomotive designed for the London and South Western Railway by William Adams. Sixty were constructed during the late nineteenth century. They were also the last steam engines to work on the Isle of Wight, with the final two being withdrawn in 1967. One has been preserved and is operational.