LSWR 380 class

4 ft 8+1⁄2 in (1,435 mm)Leading dia.2 ft 6 in (0.762 m)Driver dia.5 ft 7 in (1.702 m)Fuel typeCoalBoiler pressure160 lbf/in² (1.10 MPa)CylindersTwo, outsideCylinder size18 in × 24 in (457 mm × 610 mm)

Performance figures
Tractive effort	15,784 lbf (70.21 kN)

Career
Operators	London and South Western Railway Southern Railway
Power class	SR: J
Nicknames	Steamrollers
Locale	Great Britain
Withdrawn	1913–1924
Disposition	All scrapped

The LSWR 380 class was a class of 4-4-0 tender locomotives designed by William Adams for the London and South Western Railway and introduced about 1879. They were built by Beyer, Peacock and Company and received LSWR numbers 380–391. They were nicknamed "steam rollers" because of their small solid bogie wheels. The design was developed from Adams' 46 class 4-4-0T, later rebuilt as 4-4-2T.^[1]

Twelve were purchased in 1879 and were numbered 380 to 391. They were all placed on the duplicate list as 0380 to 0391 in 1902. Four were withdrawn in 1913; and five of the remaining eight were renumbered again in 1914, still on the duplicate list. These eight all passed to the Southern Railway in 1923, but all were withdrawn by the end of 1925.