LSWR A12 class

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Withdrawn A12 class No. 555 dumped at the far end of Eastleigh Locomotive Yard 11 July 1946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 classification B1n
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Driver diameter 73 in (1.854 m)
Trailing wheel
diameter		 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
Operator(s) 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.

YearOrderBuilderQuantityLSWR numbersNotes
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 Withdrawals started in 1928, with four of the class surviving to Nationalisation, but all were withdrawn in the first year of British Railways.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. ↑ 1.0 1.1 1.2 1.3 1.4 Bradley 1967, p. 41.
  2. ↑ Bradley 1967, p. 41–42.

References

External links