PLM 241 B 1

{{unreferenced|date=December 2014}}

{{Infobox locomotive

| name = PLM 241 B 1

| powertype = Steam

| image = PLM 241 B 1.jpg

| alt =

| caption =

| designer =

| builder = Henschel & Sohn

| ordernumber =

| serialnumber =

| builddate = 1929

| totalproduction = 1

| whytetype = 4-8-2

| uicclass = 2′D1′h4v

| gauge = {{track gauge|sg|allk=on}}

| leadingdiameter =

| driverdiameter = {{convert|1800|mm|in|1|abbr=on}}

| trailingdiameter =

| minimumcurve =

| wheelbase =

| length = {{convert|16125|mm|ftin|0|abbr=on}}

| width = {{convert|115.44|t|abbr=on}}

| height =

| axleload =

| weightondrivers =

| locoweight =

| tenderweight =

| locotenderweight =

| tendertype =

| fueltype =

| fuelcap =

| watercap =

| tendercap =

| sandcap =

| boiler = 3-stage

| boilerpressure = HP: {{convert|110|bar|MPa psi|sigfig=3|abbr=on}},
MP: {{convert|58|bar|MPa psi|sigfig=3|abbr=on}},
LP: {{convert|13|bar|MPa psi|sigfig=3|abbr=on}}

| feedwaterheater =

| firearea = {{convert|3.9|m2|sqft|abbr=on}}

| tubearea =

| fluearea =

| tubesandflues =

| fireboxarea =

| totalsurface = {{convert|187|m2|sqft|abbr=on}}

| superheatertype =

| superheaterarea = {{convert|95|m2|sqft|abbr=on}}

| cylindercount =

| cylindersize =

| frontcylindersize=

| rearcylindersize =

| hpcylindersize = {{convert|240|x|650|mm|in|2|abbr=on}}

| lpcylindersize = {{convert|500|x|700|mm|in|1|abbr=on}}

| valvegear =

| valvetype =

| valvetravel =

| valvelap =

| valvelead =

| transmission =

| maxspeed = {{convert|110|km/h|0|abbr=on}}

| poweroutput =

| tractiveeffort =

| factorofadhesion =

| trainheating =

| locobrakes =

| locobrakeforce =

| trainbrakes =

| safety =

| operator = PLM

| operatorclass = 241 B

| powerclass =

| numinclass =

| fleetnumbers = 241 B 1

| officialname =

| nicknames =

| axleloadclass =

| locale =

| deliverydate =

| firstrundate =

| lastrundate =

| retiredate =

| withdrawndate =

| preservedunits =

| restoredate =

| scrapdate = 1936

| currentowner =

| disposition =

}}

The PLM 241 B 1 was a high-pressure steam locomotive built in 1929 for the PLM (Chemins de fer de Paris à Lyon et à la Méditerranée) using the Schmidt high-pressure system. It was a 4-cylinder compound design.

The manufacturer was Henschel & Sohn of Germany; it was considered unusual for a French railway to buy German technology due to the deteriorating relations between the two at the time. Schmidt and Henschel seem to have been the only sources of suitable technology.

Only one was built. The locomotive was scrapped in 1936.

• Boiler: 3-stage boiler:
• high pressure circuit: {{convert|110|bar|MPa psi|2}}
• secondary circuit: {{convert|58|bar|MPa psi|2}}
• low-pressure circuit: {{convert|13|bar|MPa psi|}}
• Power: {{convert|2530|hp|MW}}
• Speed (attained): {{convert|110|km/h|0|abbr=on}}