Midland Railway 1121 Class

Midland Railway 1121 class
LMS 1874
Type and origin Power type Steam Designer Samuel W. Johnson Builder Derby Works (10) Sharp, Stewart & Co. (5) Robert Stephenson & Co. (40) Build date 1895–1899 Total produced 55
Specifications Configuration: ​  • Whyte 0-6-0T  • UIC C n2t Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 4 ft 6 in (1.372 m) Wheelbase: ​  • Axle spacing (Asymmetrical) 7 ft 4 in (2.235 m) + 8 ft 2 in (2.489 m) Boiler MR type A1 Boiler pressure 160 lbf/in2 (1.1 MPa)[1] Heating surface 1,120 sq ft (104 m2)[1] Cylinders Two, inside Cylinder size 17 in × 24 in (432 mm × 610 mm)
Career Operators Midland Railway London, Midland and Scottish Railway British Railways Power class 1F Numbers MR: 1121–1130, 2248–2252, 2361–2390, 2571–2580 LMS: 1845–1899 BR: 41846–41890 (with gaps) Locale London Midland Region Withdrawn December 1930 – July 1963 Disposition All scrapped

The Midland Railway 1121 class was a class of 0-6-0T tank locomotives designed by Samuel W. Johnson for the Midland Railway. Fifty-five were built between 1895 and 1900: ten by the railway company's Derby Works, five by Sharp, Stewart and Company, and the remaining forty by Robert Stephenson and Company.

The class were a development of the 1377 class “half cabs”. They differed by having the A1 type boiler in place of the earlier's type A. The wheelbase was stretched by 6 inches (150 mm) – all between the main and rear driving wheels. They also had a full cab.

All 55 passed to the London, Midland and Scottish Railway (LMS) at the 1923 grouping in 1923. Withdrawals started in 1930, and by 1948, when the railways were nationalised, 23 locomotives passed into British Railways ownership, and were allocated numbers 40000 higher than their LMS numbers, although five were withdrawn before the new numbers were applied. Withdrawals continued, with the last one, 41875, taken out of service in July 1963.

None were preserved.

• Baxter, Bertram (1982). Baxter, David (ed.). British Locomotive Catalogue 1825–1923. Vol. 3A: Midland Railway and its constituent companies. Ashbourne, Derbyshire: Moorland Publishing Company. ISBN 9780903485524.
• Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. ISBN 0-7110-0554-0.