Editing LMS Princess Royal Class (section)

{{Short description|Class of 12+1 British 4-6-2 locomotives}}
{{Use dmy dates|date=March 2017}}
{{Use British English|date=March 2017}}
{{Infobox locomotive
| name             = ''Princess Royal'' Class
| image            = Crewe 3 railway works geograph-2192835.jpg
| alt              = 
| caption          = 6210 ''Lady Patricia'' at [[Crewe Works]] in 1948
| powertype        = Steam
| designer         = [[William Stanier]]
| builder          = LMS [[Crewe Works]]
| ordernumber      = 
| serialnumber     = 
| buildmodel       = 
| builddate        = 1933 (2), 1935 (10)
| totalproduction  = 12
| rebuilder        = 
| rebuilddate      = 
| numberrebuilt    = 
| whytetype        = [[4-6-2]]
| uicclass         = 2′C1′ h4s
| driver           = <!-- e.g. 1st, 2nd  or 3rd coupled axle -->
| gauge            = {{track gauge|ussg}}
| leadingdiameter  = {{convert|3|ft|0|in|3|abbr=on}}
| driverdiameter   = {{convert|6|ft|6|in|3|abbr=on}}
| trailingdiameter = {{convert|3|ft|9|in|3|abbr=on}}
| tenderdiameter   = <!-- tender wheel diameter -->
| minimumcurve     = {{ubl|{{convert|6|chain|m|0}} normal|{{convert|4+1/2|chain|m|0}} dead slow}}
| wheelbase        = {{convert|63|ft|10|in|m|3|abbr=on}}
|  engine total    = {{convert|37|ft|9|in|m|3|abbr=on}}
|  leading         = 
|  drivers         = {{convert|15|ft|3|in|m|3|abbr=on}}
|  coupled         = <!-- British terminology -->
|  trailing        = 
|  tender total    = {{convert|15|ft|0|in|m|3|abbr=on}}
| pivotcentres     = <!-- Garratts, diesels and electrics -->
| wheelspacing     = <!-- coupled wheels with asymmetrical wheel spacing --> 
| length           = {{convert|74|ft|4+1/4|in|m|3|abbr=on}}
|  over couplers   = 
|  over bufferbeams= 
| width            = {{convert|9|ft|0|in|m|3|abbr=on}}
| height           = {{convert|13|ft|3|in|m|3|abbr=on}}
| frametype        = 
| axleload         = {{convert|22.5|LT}}
|  leadingbogie/pony= {{convert|21|LT}}
|  coupled all     = {{convert|22|LT}}
|  coupled 1       = <!-- load on 1st coupled wheel -->
|  coupled 2       = <!-- load on 2nd coupled wheel -->
|  coupled 3       = <!-- etc. -->
|  coupled 4       = 
|  coupled 5       = 
|  coupled 6       = 
|  coupled 7       = 
|  coupled 8       = 
|  trail bogie/pony= {{convert|16|LT}}
|  tenderbogieload = <!-- load per tender bogie, use "Truck 1:<br />Bogie 2:" if different -->
|  tenderaxle      = {{ubl|''Front:'' {{convert|18.6|LT}}|''Middle:'' {{convert|17.8|LT}}|''Rear:'' {{convert|18.25|LT}}}}
| weightondrivers  = {{convert|67.5|LT}}
| locoweight       = {{ubl|{{convert|104.5|LT|ST t|abbr=on}}|''46202:'' {{convert|110.55|LT|ST t|abbr=on}}}}
| tenderweight     = {{convert|54.65|LT|ST t|abbr=on}}
| locotenderweight = 
| tendertype       = 
| fueltype         = [[Coal]]
| fuelcap          = {{ubl|{{convert|9|LT|ST t|abbr=on}}|later {{convert|10|LT|ST t|abbr=on}}}}
| watercap         = {{convert|4000|impgal|abbr=on}}
| tendercap        = 
| sandcap          = 
| fireboxtype      = &nbsp;<!-- Round-top, Belpaire, combustion chamber, etc. -->
|  firearea        = {{convert|45|sqft|abbr=on}}
| boiler           = LMS type 1
|  boilertype      = <!-- Domeless, etc -->
|  pitch           = <!-- height of boiler centreline above the railhead -->
|  diameterinside  = 
|  lengthinside    = {{convert|19|ft|3|in|m|3|abbr=on}}
|  smalltubediameter= {{convert|2+3/8|in|mm|0|abbr=on}}, 32 off
|  largetubediameter= {{convert|5+1/8|in|mm|0|abbr=on}}, 123 off
| boilerpressure   = {{convert|250|psi|MPa|abbr=on|lk=on}}
| safetyvalvetype  = <!-- Salter spring balance, Ramsbottom, Pop, etc. -->
| feedwaterheater  = 
| totalsurface     = &nbsp;
|  tubearea        = 
|  archarea        = 
|  fluearea        = 
|  tubesandflues   = {{convert|2299|sqft|abbr=on}}
|  fireboxarea     = {{convert|190|or|217|sqft|abbr=on}}
| superheatertype  = 
|  superheaterarea = {{convert|584|sqft|abbr=on}}
| cylindercount    = 4
| cylindersize     = Production Models:<br />{{convert|16+1/4|x|28|in|0|abbr=on}}
| valvegear        = [[Walschaerts valve gear|Walschaerts]]<br />6205 had outside Walschaerts with rocking shafts operating inside valves.
| valvetype        = Piston valves
| valvetravel      = 
| valvelap         = 
| valvelead        = 
| transmission     = 
| trainheating     = 
| locobrakes       = 
| locobrakeforce   = 
| trainbrakes      = 
| safety           = 
| coupling         = 
| maxspeed         = 
| poweroutput      = 
| tractiveeffort   = {{convert|40286|lbf|kN|2|abbr=on}} (production engines)
| factorofadhesion = 
| operator         = {{ubl|[[London, Midland and Scottish Railway]]|[[British Railways]]}}
| operatorclass    = 
| powerclass       = 7P reclassified 8P in 1951 
| numinclass       = 
| fleetnumbers     = (4)6200/1/3–12
| officialname     = 
| nicknames        = Lizzies
| axleloadclass    = 
| locale           = [[London Midland Region of British Railways|London Midland Region]]
| deliverydate     = 
| firstrundate     = 
| lastrundate      = 
| withdrawndate    = 1961 (6), 1962 (6)
| preservedunits   = [[LMS Princess Royal Class 6201 Princess Elizabeth|6201]], [[LMS Princess Royal Class 6203 Princess Margaret Rose|6203]]
| restoredate      = 
| scrapdate        = 
| currentowner     = 
| disposition      = Two preserved, remainder scrapped
| notes            = 
}}
The [[London, Midland and Scottish Railway]] (LMS) '''Princess Royal Class''' is a class of express passenger [[4-6-2]] [[steam locomotive]] designed by [[William Stanier]].  Twelve examples were built at [[Crewe]] Works, between 1933 and 1935, for use on the [[West Coast Main Line]].  Two are preserved.