Alsace-Lorraine 4-8-4 Locomotives in France

Class T20 (Locobase 15511)

Data from SACM diagram UG Type. from Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as

Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007). See also the French Wikipedia entry at [], last accessed 21 October 2013. Works numbers were 7676-7677.

Tube diameter is the interior measurement. External tube diameter was 55 mm (2.17"), external flue diameter was 145 mm (5.71").

These long tank locomotives are described in Wikipedia as duplicates of the PLM's 242 TA class shown in Locobase 2133. Yet, the tube counts vary considerably because the PLM locomotives had many fewer Serve tubes of larger diameter than these more conventionally laid out boilers. The Belpaire fireboxes has similar heating surface areas and identical grate areas.

The design was the most powerful French tank locomotive to be built in large numbers. All were taken into the SociTtT nationale des chemins de fer frantais (SNCF) in 1938 as 242 TA 601-620.

This entry records the data for the first twenty; the SACM locomotives are entered in Locobase 15512. Of these Batignolles, five were taken into Third Reich service. One, 6201 was placed in its own class BauReihe 79.001. All remained in Germany after World War II, but were never satisfactorily integrated into the Bundesbahn. The 8604, 8607-8608, and 8620 were scrapped in 1953-1957. 8602 was withdrawn in 1963.

Class T20 (Locobase 15512)

Data from SACM diagram UG Type. 187 from Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as

Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007). Works numbers were 7531-7540.

Tube diameter is the interior measurement. External tube diameter was 50 mm (1.97"), external flue diameter was 143 mm (5.63").

These long tank locomotives are described in Wikipedia as duplicates of the PLM's 242 TA class shown in Locobase 2133. Yet, the tube counts vary considerably because the PLM locomotives had many fewer Serve tubes of larger diameter than these more conventionally laid out boilers. The Belpaire fireboxes has similar heating surface areas and identical grate areas.

The design was the most powerful French tank locomotive to be built in large numbers. All were taken into the SociTtT nationale des chemins de fer frantais (SNCF) in 1938 as 242 TA 601-620.

This entry records the data for the last 10; the Batignolles locomotives are entered in Locobase 15512. According to the SACM diagram, this set had slightly larger flues than the Batignolles engines. One of the class--8629--was taken into the Third Reich, but never given a DRG class ID. It was scrapped in the mid-1950s.