PLM 241 B 1

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.

PLM 241 B 1
Type and origin
Power typeSteam
BuilderHenschel & Sohn
Build date1929
Total produced1
Specifications
Configuration:
  Whyte4-8-2
  UIC2′D1′h4v
Gauge1,435 mm (4 ft 8+12 in) standard gauge
Driver dia.1,800 mm (70.9 in)
Length16,125 mm (52 ft 11 in)
Width115.44 t (113.62 long tons; 127.25 short tons)
Firebox:
  Firegrate area
3.9 m2 (42 sq ft)
Boiler3-stage
Boiler pressureHP: 110 bar (11.0 MPa; 1,600 psi),
MP: 58 bar (5.80 MPa; 841 psi),
LP: 13 bar (1.30 MPa; 189 psi)
Heating surface187 m2 (2,010 sq ft)
Superheater:
  Heating area95 m2 (1,020 sq ft)
High-pressure cylinder240 mm × 650 mm (9.45 in × 25.59 in)
Low-pressure cylinder500 mm × 700 mm (19.7 in × 27.6 in)
Performance figures
Maximum speed110 km/h (68 mph)
Career
OperatorsPLM
Class241 B
Numbers241 B 1
Scrapped1936

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: 110 bars (11.00 MPa; 1,595.42 psi)
    • secondary circuit: 58 bars (5.80 MPa; 841.22 psi)
    • low-pressure circuit: 13 bars (1.3 MPa; 190 psi)
  • Power: 2,530 horsepower (1.89 MW)
  • Speed (attained): 110 km/h (68 mph)
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