LSWR A12 class

Withdrawn A12 class No. 555 dumped at the far end of Eastleigh Locomotive Yard 11 July 1946

Type and origin
Power type	Steam
Designer	William Adams
Builder	LSWR Nine Elms Works (50) Neilson & Co. (40)
Build date	1887–1894
Total produced	90

Specifications
Configuration	0-4-2
UIC class	B1n
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm)
Driver dia.	73 in (1.854 m)
Trailing dia.	48 in (1.219 m)
Boiler pressure	160 psi (1.10 MPa)
Cylinders	Two, inside
Cylinder size	18×26 in (457×660 mm)

Performance figures
Tractive effort	15,690 lbf (69.79 kN)

Career
Operators	London and South Western Railway Southern Railway British Railways
Class	LSWR: A12 SR: A12 BR: 1MT
Nicknames	Jubilees
Retired	1928–1948
Disposition	All scrapped

The A12 locomotives of the London and South Western Railway were built between the years 1887 and 1895 to the design of William Adams. Ninety of the locomotives were built; numbered 527-556 (built at Nine Elms Works); 607-646 (Neilson and Company (although officially known as O4 class); 597-606 and 647-656 (Nine Elms), they were unusual for their time. The wheelbase type (0-4-2) was being built by few of the other railway companies, and were soon being phased out (the Great Northern Railway had 150 such locomotives). They bore the nickname "Jubilees", because the first batch appeared in the Golden Jubilee of Queen Victoria's reign.

Year	Order	Builder	Quantity	LSWR numbers	Notes
1887	A12	LSWR Nine Elms	10	527–536	^[1]
1888	E1	LSWR Nine Elms	10	537–546	^[1]
1889	M2	LSWR Nine Elms	10	547–556	^[1]
1893–94	O4	LSWR Nine Elms	10	597–606	^[1]
1892–93	—	Neilson & Co. 4506–4545	40	607–646	^[2]
1894–95	K6	LSWR Nine Elms	10	647–656	^[1]

All 90 passed to the Southern Railway in 1923. Withdrawals started in 1928, with four of the class surviving to Nationalisation, but all were withdrawn in the first year of British Railways. None of the locomotives were preserved.

Notes

1 2 3 4 5 Bradley 1967, p. 41.
↑ Bradley 1967, p. 41–42.

References

Bradley, D.L. (1967). Locomotives of the L.S.W.R.: Part 2. Kenilworth: RCTS.
Railway Magazine. March 1925. Missing or empty |title= (help)

External links

SEMG details

LSWR Locomotive Classes

J.V. Gooch 1841–1850	Eagle Bison Mazeppa Vesuvius

J.H. Beattie 1850–1871	Hercules Tartar Sussex Canute Saxon Chaplin Minerva Nelson Nile Tweed Undine Clyde Gem Eagle Falcon Standard 2-4-0WT Lion Volcano 221 231 Vesuvius

W.G. Beattie 1871–1878	273 282 302 318 330 348

W. Adams 1878–1895	380 135 395 46 415 445 460 A12 T1 O2 X2 B4 T3 G6 T6 X6

D. Drummond 1895–1912	T7 M7 700 C8 F9 T9 E10 K10 K11 (railcar) L11 S11 H12 (railcar) L12 F13 H13 (railcar) C14 E14 G14 P14 S14 T14 D15

R. Urie 1912–1922	H15 N15 S15 G16 H16

Other designs	Vulcan & Bredwalda Clausetum & Ironside Terrier PD&SWJR 0-6-2T PD&SWRJ 0-6-0T

SE&CR locomotives LB&SCR locomotives Southern Railway locomotives

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