{{Short description|Class of British steam locomotives}} {{Use dmy dates|date=April 2022}} {{Infobox locomotive | name = Midland Railway 1121 class | image = LMS 1874.jpg | alt = | caption = LMS 1874 | powertype = Steam | designer = [[Samuel Waite Johnson|Samuel W. Johnson]] | builder = {{ubl|[[Derby Works]] (10)|[[Sharp, Stewart & Co.]] (5)|[[Robert Stephenson & Co.]] (40)}} | ordernumber = | serialnumber = | buildmodel = | builddate = 1895–1899 | totalproduction = 55 | rebuilder = | rebuilddate = | numberrebuilt = | whytetype = [[0-6-0T]] | uicclass = C n2t | driver = <!-- e.g. 1st, 2nd or 3rd coupled axle --> | gauge = {{track gauge|ussg}} | driverdiameter = {{convert|4|ft|6|in|m|3|abbr=on}} | minimumcurve = | wheelbase = | engine total = | wheelspacing = {{ubl|{{convert|7|ft|4|in|m|3|abbr=on}} +|{{convert|8|ft|2|in|m|3|abbr=on}}}} | length = | over couplers = | over bufferbeams= | width = | height = | frametype = | axleload = | coupled all = <!-- when the load on all coupled wheels are the same --> | coupled 1 = <!-- load on 1st coupled wheel --> | coupled 2 = <!-- load on 2nd coupled wheel --> | coupled 3 = <!-- etc. --> | weightondrivers = | locoweight = | fueltype = | fuelcap = | watercap = | tendercap = | sandcap = | fireboxtype = <!-- Round-top, Belpaire, combustion chamber, etc. --> | firearea = | boiler = MR type A1 | boilertype = <!-- Domeless, etc --> | pitch = <!-- height of boiler centreline above the railhead --> | diameterinside = | lengthinside = <!-- distance between tube plates --> | smalltubediameter= <!-- number of boiler tubes and their outside diameter --> | largetubediameter= <!-- number of larger tubes (flues), if any, and their outside diameter --> | boilerpressure = {{convert|160|lbf/in2|MPa|abbr=on}}{{sfn|Baxter|1982a|p=118}} | safetyvalvetype = <!-- Salter spring balance, Ramsbottom, Pop, etc. --> | feedwaterheater = | totalsurface = {{convert|1120|sqft|m2|abbr=on}}{{sfn|Baxter|1982a|p=118}} | tubearea = | archarea = | fluearea = | tubesandflues = | fireboxarea = | superheatertype = | superheaterarea = | cylindercount = Two, inside | cylindersize = {{convert|17|x|24|in|mm|0|abbr=on}} | valvegear = | valvetype = | valvetravel = | valvelap = | valvelead = | transmission = | trainheating = | locobrakes = | locobrakeforce = | trainbrakes = | safety = | coupling = | maxspeed = | poweroutput = | tractiveeffort = | factorofadhesion = | operator = {{ubl|[[Midland Railway]]|[[London, Midland and Scottish Railway]]|[[British Railways]]}} | operatorclass = | powerclass = 1F | numinclass = | fleetnumbers = {{ubl|MR: 1121–1130, 2248–2252, 2361–2390, 2571–2580|LMS: 1845–1899|BR: 41846–41890 (with gaps)}} | officialname = | nicknames = | axleloadclass = | locale = [[London Midland Region of British Railways|London Midland Region]] | deliverydate = | firstrundate = | lastrundate = | withdrawndate = December 1930 – July 1963 | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = All scrapped | notes = }} The '''Midland Railway 1121 class''' was a class of [[0-6-0T]] [[tank locomotive]]s designed by [[Samuel Waite Johnson|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]].
==Construction history== The class were a development of the [[Midland Railway 1377 Class|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 {{convert|6|in|mm}} – all between the main and rear driving wheels. They also had a full cab.
{| class="wikitable" style=text-align:center |+ Table of orders and numbers{{sfn|Baxter|1982a|pp=146–147}} ! Original No. !! 1907 (& LMS) No. !! Manufacturer !! Works Nos. !! Qty !! Year !! Notes |- | 1121–1130 || 1845–1854 || Derby Works || (order no. 1395) || 10 || 1895 || align=left | |- | 2248–2252 || 1855–1859 || Sharp, Stewart & Co. || 4062–4066 || 5 || 1895 || align=left | |- | 2361–2390 || 1860–1889 || R. Stephenson & Co. || 2931–2960 || 30 || 1899 || align=left | |- | 2571–2580 || 1890–1899 || R. Stephenson & Co. || 2961–2970 || 10 || 1899–1900 || align=left | |}
==Post-Midland Railway== All 55 passed to the [[London, Midland and Scottish Railway]] (LMS) at the [[Railways Act 1921|1923 grouping]] in 1923. Withdrawals started in 1930, and by 1948, when the railways were nationalised, 23 locomotives passed into [[British Rail]]ways ownership, and were allocated numbers 40000 higher than their LMS numbers, although 5 were withdrawn before the new numbers were applied. Withdrawals continued and the last example, 41875, was taken withdrawn in July 1963. All were scrapped.
{| class="wikitable collapsible collapsed" style=text-align:center |+ Table of withdrawals{{sfn|Baxter|1982a|pp=146–147}} ! Year !! Quantity in<br />service at<br />start of year !! Quantity<br />withdrawn !! Locomotive numbers !! Notes |- | 1930 || 55 || 6 || align=left | 1861/66-67/81/97/99 || align=left | |- | 1931 || 49 || 4 || align=left | 1858/62/82/86 || align=left | |- | 1932 || 45 || 10 || align=left | 1845/48/68/72/80/83/87-88/96/98 || align=left | |- | 1933 || 35 || 4 || align=left | 1863/77/92/94 || align=left | |- | 1934–37 || 31 || 0 || align=left | – || align=left | |- | 1938 || 31 || 1 || align=left | 1849 || align=left | |- | 1939 || 30 || 1 || align=left | 1851 || align=left | |- | 1940–45 || 31 || 0 || align=left | – || align=left | |- | 1946 || 29 || 3 || align=left | 1864/71/76 || align=left | |- | 1947 || 26 || 3 || align=left | 1850/84/91 || align=left | |- | 1948 || 23 || 2 || align=left | 1870/93 || align=left | |- | 1949 || 21 || 1 || align=left | 1874 || align=left | |- | 1950 || 20 || 2 || align=left | 1895, 41873 || align=left | |- | 1951 || 18 || 3 || align=left | 1856, 41852/54 || align=left | |- | 1952 || 15 || 1 || align=left | 41890 || align=left | |- | 1953 || 14 || 2 || align=left | 41846/49 || align=left | |- | 1954 || 12 || 1 || align=left | 41853 || align=left | |- | 1955 || 11 || 3 || align=left | 41859/65/89 || align=left | |- | 1956 || 8 || 1 || align=left | 41885 || align=left | |- | 1957 || 7 || 1 || align=left | 41860 || align=left | |- | 1958 || 6 || 0 || align=left | – || align=left | |- | 1959 || 6 || 2 || align=left | 41857/78 || align=left | |- | 1960 || 4 || 3 || align=left | 41847/55/79 || align=left | |- | 1961–62 || 1 || 0 || align=left | – || align=left | |- | 1963 || 1 || 1 || align=left | 41875 || align=left | |}
==References== {{reflist|30em}} *{{Baxter: British Locomotive Catalogue 1825–1923|volume=3A}} *{{0-7110-0554-0}}
{{Midland Railway Locomotives}}
[[Category:Midland Railway locomotives|1121]] [[Category:0-6-0T locomotives]] [[Category:Railway locomotives introduced in 1895]] [[Category:Standard-gauge steam locomotives of Great Britain]] [[Category:Sharp Stewart locomotives]] [[Category:Robert Stephenson and Company locomotives]] [[Category:Scrapped locomotives]] [[Category:C n2t locomotives]]