Paris-Lyon / PLM 2-4-0 Locomotives in France

Class 101 / 401 (Locobase 13410)

Data from [], last accessed 12 November 2011.

When these Perraches were built as 2-2-2s in 1846 (Locobase 607), they were fitted with elliptical boilers. During their conversion to 2-4-0s, they received new cylindrical boilers with longer tubes. A natural result of the conversion was a doubling of the adhesive weight. Almost all of the engines were upgraded over the next 5 years, although two (101, 120) weren't made over until 1876 and one in 1878 (109).

Most had their boiler pressure further increased to 10 kg/sq cm (142 psi) in 1902-1907; 18 were not so updated. Retirements occurred in 1905-1908.

Class 146 / 446 (Locobase 13412)

Data from [], last accessed 12 November 2011.

The 2-4-0 conversions to the Perrache 2-2-2s described in Locobase 13410 were soon supplemented by this set of fifteen newly-built engines. Although similar in some respects to the converted locomotives, the 146 class had larger boilers and fireboxes. They also had longer wheelbases.

The first withdrawals came in 1905 (406) and the last occurred in 1909 (454, 459).

Class 91 / 461 (Locobase 13409)

Data from the PLM Wiki vault crammed with data and plans at [], last accessed 11 November 2011. The plan comes from the 1869 PLM plan book collected by Roland Sermet

After more than 15 years in service as 2-2-2s (Locobase 13361), these locomotives underwent a transformation in 1873-1874. Although the driver diameter remained the same, there were now two per side, which more than doubled the adhesive weight. The boiler grew a bit as well.

All remained in service into the 20th century and all saw boiler-pressure increases to 9-10 kg/sq cm (128-142 psi). And all were withdrawn in 1905-1909 (464, 467 in 1905; 463 in 1906; 462, 465 in 1907; 461, 466 in 1908; and 468, 469, 470 in 1909).