TCDD 57001 Class

{{One source|date=December 2024}}

{{Infobox locomotive

| name = 57001 class

| image = 57 001 Camlik1.jpg

| alt =

| caption = 57001 on display at the Çamlık Railway Museum

| powertype = Steam

| designer =

| builder = {{ubl|Krupp (17)|Henschel & Sohn (7)|Berliner Maschinenbau (3)}}

| ordernumber =

| serialnumber =

| buildmodel =

| builddate = 1933–1937

| totalproduction = 27

| rebuilder =

| rebuilddate =

| numberrebuilt =

| whytetype = 2-10-2

| uicclass = 1′E1′ h2

| driver =

| gauge = {{track gauge|1435 mm}}

| leadingdiameter = {{convert|1000|mm|ftin|frac=8|abbr=on}}

| driverdiameter = {{convert|1400|mm|ftin|frac=8|abbr=on}}

| trailingdiameter = {{convert|1000|mm|ftin|frac=8|abbr=on}}

| tenderdiameter =

| minimumcurve =

| wheelbase =  

| engine total = {{convert|10.9|m|ftin|frac=4|abbr=on}}

| leading =

| drivers = {{convert|4.5|m|ftin|frac=4|abbr=on}}

| trailing =

| tender total =

| tendertruck =

| tenderbogie =

| pivotcentres =

| wheelspacing =

| length = {{convert|22.2|m|ftin|frac=4|abbr=on}} over buffers

| over couplers =

| over bufferbeams=

| width =

| height =

| frametype =

| axleload = {{convert|13.4|t}}

| leadingbogie/pony=

| coupled all =

| coupled 1 =

| coupled 2 =

| coupled 3 =

| coupled 4 =

| coupled 5 =

| trail bogie/pony=

| tenderbogieload =

| tenderaxle =

| weightondrivers = {{convert|67.1|t}}

| locoweight = {{ubl|Empty: {{convert|81.3|t}}|Service: {{convert|90.6|t}}}}

| tenderweight = Service: {{convert|60.6|t}}

| locotenderweight = Service: {{convert|151.2|t}}

| tendertype = 2′2′T27

| fueltype = Coal

| fuelcap = {{convert|8|t}}

| watercap = {{convert|27000|L}}

| tendercap =

| sandcap =

| fireboxtype =  

| firearea = {{convert|3.03|m2|abbr=on}}

| boiler =

| boilertype =

| pitch =

| diameterinside =

| lengthinside = {{convert|5.000|m|ftin|frac=8|abbr=on}}

| smalltubediameter=

| largetubediameter=

| boilerpressure = {{convert|12|bar|MPa psi|sigfig=3|abbr=on}}

| safetyvalvetype =

| feedwaterheater =

| totalsurface = {{convert|180.5|m2|abbr=on}}

| tubearea =

| archarea =

| fluearea =

| tubesandflues =

| fireboxarea = {{convert|16.5|m2|abbr=on}}

| superheatertype =

| superheaterarea = {{convert|68.25|m2|abbr=on}}

| cylindercount = Two, outside

| cylindersize = {{convert|630|x|660|mm|in|frac=16|abbr=on}}

| valvegear = Heusinger (Walschaerts)

| valvetype =

| valvetravel =

| valvelap =

| valvelead =

| transmission =

| trainheating =

| locobrakes =

| locobrakeforce =

| trainbrakes =

| safety =

| coupling =

| maxspeed = {{convert|80|km/h|mph|0|abbr=on}}

| poweroutput = {{convert|1550|PS|kW hp|abbr=on}}

| tractiveeffort = {{convert|190|kN|lbf|0|abbr=on}}

| factorofadhesion =

| operator = TCDD

| operatorclass =

| powerclass =

| numinclass =

| fleetnumbers = 57001 – 57027

| officialname =

| nicknames =

| axleloadclass =

| locale =

| deliverydate =

| firstrundate =

| lastrundate =

| retiredate =

| withdrawndate =

| preservedunits =

| restoredate =

| scrapdate =

| currentowner =

| disposition =

| notes =

}}

The Turkish State Railways (TCDD) 57001 Class is a class of 2-10-2 steam locomotives. They were built by Henschel, Berliner Maschinenbau and Krupp for TCDD. The 27 locomotives in this class were numbered 57001 to 57027. The first arrived in 1933, the last in 1937.{{sfn|Garratt|2005|page=86}}