LNWR Newton Class

{{Use British English|date=April 2019}}

{{Use dmy dates|date=August 2019}}

{{Infobox locomotive

| name = LNWR Newton class

| image = LNWR engine No.1525 'Abercrombie'.jpg

| alt =

| caption = LNWR 1525 Abercrombie at Monument Lane loco depot

| powertype = Steam

| designer = John Ramsbottom

| builder = Crewe Works

| ordernumber =

| serialnumber = 920–929, 980–999, 1160–1179, 1280–1289, 1300–1309, 1380–1385, 1479–1488, 1682–1691

| buildmodel =

| builddate = April 1866 – August 1873

| totalproduction = {{ubl|96 (LNWR)|10 (L&YR)}}

| rebuilder =

| rebuilddate =

| numberrebuilt =

| whytetype = {{whyte|2-4-0}}

| uicclass = 1B n2

| driver =

| gauge = {{track gauge|ussg}}

| leadingdiameter = {{convert|3|ft|9|in|m|3|abbr=on}}

| driverdiameter = {{convert|6|ft|9|in|m|3|abbr=on}}

| tenderdiameter = {{convert|3|ft|9|in|m|3|abbr=on}}

| minimumcurve =

| wheelbase =

| engine total = {{convert|15|ft|8|in|3|abbr=on}}

| leading = {{convert|7|ft|5|in|m|3|abbr=on}}

| coupled = {{convert|8|ft|3|in|m|3|abbr=on}}

| tender total =

| wheelspacing =

| length =

| over couplers =

| over bufferbeams=

| width =

| height =

| frametype =

| axleload =

| leadingbogie/pony=

| coupled all =

| coupled 1 =

| coupled 2 =

| coupled 3 =

| coupled 4 =

| coupled 5 =

| coupled 6 =

| coupled 7 =

| coupled 8 =

| trail bogie/pony=

| tenderbogieload =

| tenderaxle =

| weightondrivers =

| locoweight = {{convert|29|LT}}

| tenderweight =

| locotenderweight =

| tendertype =

| fueltype =

| fuelcap =

| watercap = {{convert|1500|impgal|abbr=on}}

| tendercap =

| sandcap =

| fireboxtype =

| firearea = {{convert|15|sqft|m2|abbr=on}}

| boiler =

| boilertype =

| pitch =

| diameterinside = {{convert|4|ft|0+3/16|in|m|3|abbr=on}}

| lengthinside = {{convert|10|ft|6|in|m|3|abbr=on}}

| smalltubediameter=

| largetubediameter=

| boilerpressure = {{convert|140|lbf/in2|kPa|abbr=on}}

| safetyvalvetype =

| feedwaterheater =

| totalsurface = {{convert|1099|sqft|m2|abbr=on}}

| 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 = {{convert|10190|lbf|kN|2|abbr=on}}

| factorofadhesion =

| operator = London and North Western Railway

| operatorclass =

| powerclass =

| numinclass =

| fleetnumbers =

| officialname =

| nicknames =

| axleloadclass =

| locale =

| deliverydate =

| firstrundate =

| lastrundate =

| withdrawndate =

| preservedunits =

| restoredate =

| scrapdate = November 1880 - January 1894

| currentowner =

| disposition = All scrapped

| notes =

}}

The LNWR Newton Class was a class of ninety-six {{whyte|2-4-0}} steam locomotives{{Cite web|url=http://www.lnwrs.org.uk/PassClassLocos/pass_class_menu.php?display_class_details=rnew|title=Locomotive Classes of the LNWR|website=www.lnwrs.org.uk|access-date=16 April 2019|archive-date=27 April 2019|archive-url=https://web.archive.org/web/20190427144819/http://www.lnwrs.org.uk/PassClassLocos/pass_class_menu.php?display_class_details=rnew|url-status=dead}} built by the London and North Western Railway at their Crewe Works between 1866 and 1873.

They were officially designated Curved Link 6-ft 6-in Passenger due to the use of a curved link between the fore and back eccentric rods of their Stephenson valve gear and the use of {{convert|6|ft|6|in|m|3|adj=on}} diameter wheel centres, which, together with {{convert|1+1/2|in|mm|0|adj=on}} thick tyres gave a driving wheel diameter of {{convert|6|ft|9|in|m|3|abbr=on}}.{{sfn|Baxter|1978|p=118}}{{sfn|Baxter|1978|p=120}}

They were designed by John Ramsbottom who had 76 built, all without cabs and with pierced driving wheel splashers. Ramsbottom's successor F. W. Webb, built twenty more, all with cabs. The earlier locomotives also gained cabs, and all eventually had the splashers filled in.{{sfn|Baxter|1978|pp=120, 122}}

All were 'renewed' (replaced) by a like number of LNWR Improved Precedent Class between 1887 and 1894.{{sfn|Baxter|1978|pp=120–122}}