The Est 0.501 to 0.691, also denoted as Est 0501 to 0691, was a class of 191 French 0-8-0 locomotives for freight service, built from 1856 to 1886 for the Chemins de fer de l'Est.[1]

Est 0.501 to 0.691
0-8-0 Locomotive 0.503 'Gargamelle' of the Chemins de fer de l'Est
Type and origin Power type Steam Builder Le Creusot (84) Graffenstaden (16) Fives-Lille (16) Ateliers d'Epernay (6) SACM (44) Cail (25) Build date 1856–1886 Total produced 191
Specifications Configuration: ​  • Whyte 0-8-0  • UIC D n2 Gauge 1,435 mm (4 ft 8+1⁄2 in) Driver dia. 1,250 mm (4 ft 1+1⁄4 in) Wheelbase 3.95 m (13 ft 0 in) Length 0501–0525: 9.23 m (30 ft 3 in) 0526–0691: 9.41 m (30 ft 10 in) Adhesive weight 52 t (115,000 lb) Loco weight 46 t (101,000 lb) Firebox type Crampton  • Firegrate area 1.92 m2 (20.7 sq ft) Boiler pressure 9 or 10 kg/cm2 (0.883 or 0.981 MPa; 128 or 142 psi) Heating surface 188 m2 (2,020 sq ft)  • Tubes 178.10 m2 (1,917.1 sq ft)  • Firebox 9.90 m2 (106.6 sq ft) Cylinders Two, outside Cylinder size 500 mm × 660 mm (19+11⁄16 in × 26 in) Valve gear Gooch
Performance figures Maximum speed 45 km/h (28 mph) Power output 780 CV (574 kW; 769 hp) Tractive effort 11.8 or 13 t (26,000 or 28,700 lb)
Career Operators Chemins de fer de l'Est SNCF Power class Est series 9 Numbers Est: 0.501 – 0.691 SNCF: 040 A 501 – 691 Nicknames Engerth

Construction history

The 25 locomotives of the first batch were originally delivered as 0-8-4 Engerth locomotives by Le Creusot in 1856–1857,[2] with the fleet numbers 0.164 to 0.188.[3] Due to the inherent inconveniences of the Engerth system, particularly in case of derailments, the decision was taken to rebuild these engines into locomotives with separate tenders, at which point they were also renumbered 0.501 to 0.525.[4] Additionally the adhesive weight could be increased from 39.3 to 45.5 tons. The rebuilding work was carried out in the Est Company's workshops at Épernay from 1860 to 1868.[2]

The wide firebox of the Engerth machines necessitated it to be placed outside of the wheels and therefore resulted in a large overhang, which had to be compensated on the rebuilt machines with a counterweight of 1,100 kg (2,425 lb) in the front of the engine.[5][6] The counterweight was reduced to 800 kg (1,764 lb) in the following 38 machines of the subsequent orders from 1866 to 1872, and then finally omitted on the later series from 1880.[5]

The subsequent batches were ordered with some differences from various manufacturers from 1866 to 1884.[1]

The locomotives of the first series were named after fictional characters from the works of Rabelais:[1][7]

The locomotives of the series 0.526 – 0.541 were given the following names:[7]

References

Wikimedia Commons has media related to Est 0.501 to 0.691.

Bibliography

• Davies, John (July 2001). Chemins de fer de l’Est Locomotive List 1839–1938 (Third ed.). Woodbridge, Queensland: Dr. John Davies. ISBN 0-646-06600-5.
• Gillot, Jean (1976). Les Locomotives a Vapeur de la S.N.C.F. Région Est (in French). Editions Picador.
• Vilain, Lucien-Maurice (1980). L'Évolution des locomotives à vapeur de la compagnie des chemins de fer de l'Est 1853-1938 (in French). éditions Pygmalion. ISBN 2-85704-081-4.
• Deghilage (1883). "Note sur les locomotives construites pour les Chemins de fer français, De 1878 à 1881 - Troisième partie - Locomotives a adhérence totale a huit roues accouplées". Revue générale des chemins de fer (in French). Paris: P. Vicq-Dunod. 6, 2e Semestre: 286–302. OCLC 6536095.
• Demoulin, Maurice (1898). Traité pratique de la machine locomotive (in French). Vol. 1. Baudry et Cie.

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