LSWR X2 class

The LSWR X2 class was a class of express passenger 4-4-0 steam locomotives designed for the London and South Western Railway by William Adams. Twenty were constructed at Nine Elms Locomotive Works between 1890 and 1892.

LSWR X2 class
LSWR X2 class locomotive no. 577
Type and origin Power type Steam Designer William Adams Builder LSWR Nine Elms Works Build date 1890–1892 Total produced 20
Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B n2 Gauge 4 ft 8+1⁄2 in (1,435 mm) Leading dia. 3 ft 9+3⁄4 in (1.162 m) Driver dia. 7 ft 1 in (2.159 m) Length 53 ft 8+3⁄8 in (16.37 m) Height 13 ft 2+3⁄4 in (4.03 m) Axle load 15.45 long tons (15.70 t) Adhesive weight 30.30 long tons (30.79 t) Loco weight 48.675 long tons (49.456 t) Tender weight 36.20 long tons (36.78 t) Fuel type Coal Fuel capacity 3.00 long tons (3.05 t) Water cap. 3,300 imp gal (15,000 L; 4,000 US gal) Boiler pressure 175 psi (1.21 MPa) Cylinders Two, outside Cylinder size 19 in × 26 in (483 mm × 660 mm)
Performance figures Tractive effort 16,426 lbf (73.1 kN)
Career Operators LSWR · Southern Railway Class X2 Power class SR: I Withdrawn 1930–1942 Disposition All scrapped

The class were numbered 577–596, and were an enlarged version of the 460 class. Adams had designed his 7-foot-1-inch (2.159 m) drivered locomotives for the London to Bournemouth route, while the 6-foot-7-inch (2.007 m) drivered locomotives were intended for the London to Salisbury route which had more severe gradients.^[1]

Table of locomotive orders

Year	Order	Quantity	LSWR Numbers	Notes
1890	X2	10	577–586
1891	F3	10	587–596

All passed to the Southern Railway at the grouping in 1923. Withdrawals started in 1930, and by the end of 1933, only four remained. No. 592 went in 1936, numbers 587 and 590 were retired during 1937, leaving only No. 586, which was withdrawn in November 1942. All were scrapped.

Table of withdrawals

Year	Quantity in service at start of year	Quantity withdrawn	Locomotive numbers
1930	20	1	595
1931	19	8	582, 583, 585, 589, 591, 593, 594, 596
1932	11	3	579, 581, 588
1933	8	4	577, 578, 580, 584
1936	4	1	592
1937	3	2	587, 590
1942	1	1	586