Midi 2-4-0 Locomotives in France

Class 101 (Locobase 6849)

Data from August Perdonnet et Camille Polonceau, Nouveau Portefeuille de L'Ingenieur des Chemins de Fer, Tome Second (Paris: Librairie Scientifique, Industrielle et Agricole, 1866), pp. 528-529. See also Titre Rapports du jury mixte internationale publies sous la dir. de S.A.I le Prince Napoleon, presidente de la commission Imperial (Paris, Impremerie Imperiale, 1856) Collation [4]-LXXVI-1574-p. -[2]; Cote CNAM 8th Xae 53 - Mots mateiere Exposition internationale (1885; Paris); Industrie - 19e siecle; Produits industriels - 19e siecle, p. 233, hosted on cnum.cnam.fr/CGI/fpage.cgi?8XAE53/320/100/1664/0/0, accessed 1 September 2005.

In addition to the tall-drivered 0-4-2s described in Locobase 6850, the Midi used the same boiler and cylinders to equip this mixed-traffic tank engine.

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Class 113 (Locobase 15574)

Data from diagram Loco: 4, Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as

Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007).

The diagram shows a domeless boiler with only a small regulator box just behind the balloon stack. The driver and fireman stood on a footplate with no protection from the elements. Just ahead was the prominent safety valve stand on the firebox.

Locobase's identification of the engine as a Midi 113 is based on a photograph of a very similar locomotive after its conversion to a tank engine.

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Class 149 (Locobase 11314)

Data from August Perdonnet et Camille Polonceau, Nouveau Portefeuille de L'Ingenieur des Chemins de Fer, Tome Second (Paris: Librairie Scientifique, Industrielle et Agricole, 1866), pp. 528-529.

Locobase currently has no additional information on this mixed-traffic class except to note that it was virtually identical to the 2-4-0T and 2-2-2 classes shown in Locobase 6849-6850. The big difference was the provision of boiler tubes that were 1 meter longer (possibly to make better use of the hot gases, a major reason for the Longboiler design).

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Class 201 (Locobase 11315)

Data from August Perdonnet et Camille Polonceau, Nouveau Portefeuille de L'Ingenieur des Chemins de Fer, Tome Second (Paris: Librairie Scientifique, Industrielle et Agricole, 1866), pp. 528-529. Supplemented by Wikimedia at [], last accessed 22 September 2018.

Obviously following on from the Midi's 149 class (Locobase 11314) and the earlier passenger classes shown in Locobases 6849-6850, this design was the first to change the firebox (slightly reducing it) while shrinking the heating surface more, increase cylinder diameter by 20 mm (4/5"), and put some more weight on the drivers.

201, 205 were retired by 1891. In 1892, the class received new boilers with more tubes offering a total of 113.98 sq m; with the firebox area, total evaporative heating surface area climbed to 121.38 sq m (1,307 sq ft). In 1919, the nine remaining machines underwent a further change that reduced the area to nearly the same figure as its 1875 amount.

The last of the class was retired in the late 1920s.

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Class 30 (Locobase 6879)

Data from Titre Exposition universelle internationale de 1878 a Paris. Rapports du jury internationale..Volume Groupe VI - Classe 64. Rapport sur le materiel des chemins de fer. p. 50 (cnum.cnam.fr/CGI/fpage.cgi?8XAE277-11.1/54/100/312/0/0 (accessed 1 September 2005).

Compared to other locomotives of those layouts in that period, these ran a little above average. The high drivers meant that the boiler's steam went a long way. The jury report noted that the leading truck had centering devices based on the d'Orleans inclined-plane design that allowed a lateral displacement of 16 mm.

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Class Express (Locobase 7405)

Data from Titre Exposition universelle internationale de 1889 a Paris. Rapports du jury internationale. Auteur - Volume France. Ministere du Commerce, de l'industrie. Picard, Alfred, ed. Volume Groupe VI - -Outillage et precedes des industries mecaniques. Electricite (5e partie) Classes 60 a 63. Rapport sur le materiel des chemins de fer. tables beginning on p. 183 ([] (accessed 1 September 2005). See also "Locomotives Grand Vitesse - 4 Roues Couplees", Schneider catalogue Type 103, pp. 36-37 archived at [], last accessed 9 December 2018. Works numbers were 2294-2307, 2414-2428, 2445-2449, and 2528-2521.

Locobase 6869 shows one of the Midi 2-4-0s that appeared at the 1878 Paris Exposition. Seven years later came this updated younger brother. A slight increase in boiler pressure and decrease in driver diameter conferred more power. The boiler remained essentially the same, although it had more, smaller-diameter tubes. The firebox area increased a bit even though the grate area remained the same.

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Class unknown (Locobase 15575)

Data from diagram Loco: 6, Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as

Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007).

Like the Midi six-wheeler shown in Locobase 15574, this engine had a domeless boiler with a small regulator box behind the stack. The stack was straight, however, with a flared top. The driver and fireman stood on a footplate with no protection from the elements. Just ahead was the prominent safety valve stand on the firebox.

Locobase's identification of the engine as a Midi 113 is based on a photograph of a very similar locomotive after its conversion to a tank engine.