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Withdrawn A12 class No. 555 dumped at the far end of Eastleigh Locomotive Yard 11 July 1946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:
 ​
 • Whyte 0-4-2
 • UIC B1 n2
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Driver dia. 6 ft 1 in (1.854 m)
Trailing dia. 4 ft 0 in (1.219 m)
Boiler pressure 160 lbf/in2 (1.10 MPa)
Cylinders Two, inside
Cylinder size 18 in × 26 in (457 mm × 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.

YearOrderBuilderQuantityLSWR numbersNotes
1887A12LSWR Nine Elms10527–536[1]
1888E1LSWR Nine Elms10537–546[1]
1889M2LSWR Nine Elms10547–556[1]
1893–94O4LSWR Nine Elms10597–606[1]
1892–93—Neilson & Co. 4506–454540607–646[2]
1894–95K6LSWR Nine Elms10647–656[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 Withdrawals started in 1928, with four of the class surviving to Nationalisation, but all were withdrawn in the first year of British Railways.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.

Table of withdrawals
YearQuantity in
service at
start of year		Quantity
withdrawn		Locomotive numbersNotes
1928906E529, E535, E542, E548, E552, E553
19298413E528, E531–E533, E536, E537, E540, E543, E544, E547, E549, E550, E556
1930713E527, E539, E546
1931686E530, E534, E538, E541, E545, E554
1932626551, 607, 608, 610, 653, 656
1933569602, 604, 626, 631, 633, 639, 645, 647, 651
1934471601
1935463603, 621, 635
1936434605, 616, 622, 655
1937394611, 619, 632, 640
1938353617, 628, 650
1939321646613, 620, 624, 625, 629, 642, 644 withdrawn and then reinstated
1944311555
19463012599, 600, 606, 612, 613, 615, 620, 623, 637, 641, 644, 649612 transferred to Departmental stock as 3191S, later BR DS3191; scrapped 1951
19471814597, 598, 609, 614, 624, 625, 630, 634, 638, 642, 643, 648, 652, 654
194844618, 627, 629, 636

Notes

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)
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