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 type Steam Builder Henschel & Sohn Build date 1929 Total produced 1
Specifications Configuration: ​  • Whyte 4-8-2  • UIC 2′D1′h4v Gauge 1,435 mm (4 ft 8+1⁄2 in) standard gauge Driver dia. 1,800 mm (70.9 in) Length 16,125 mm (52 ft 11 in) Width 115.44 t (113.62 long tons; 127.25 short tons) Firebox: ​  • Grate area 3.9 m2 (42 sq ft) Boiler 3-stage Boiler pressure HP: 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 surface 187 m2 (2,010 sq ft) Superheater: ​  • Heating area 95 m2 (1,020 sq ft) High-pressure cylinder 240 mm × 650 mm (9.45 in × 25.59 in) Low-pressure cylinder 500 mm × 700 mm (19.7 in × 27.6 in)
Performance figures Maximum speed 110 km/h (68 mph)
Career Operators PLM Class 241 B Numbers 241 B 1 Scrapped 1936

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)

External links

• Pictures of the PLM 241 B Archived 2010-10-18 at the Wayback Machine