The EST Class 11 Nos. 3401 to 3500 (later SNCF 1-230.A.401 to 500), is a class of 4-6-0 Ten Wheeler steam locomotive, designed to ensure mixed traffic services for the Compagnie des Chemins de fer de l'Est, by Its chief mechanical engineer Louis Salomon. Their design, was close to the one of the Baden class IV e, and thus was apart of the SACM Ten Wheeler family.
Description[]
The 3400s were 4-cylinders locomotive with a compounding engine Du Bousquet-De Glehn type, and uncrossed cylinders, and working with saturated steam. They have a front steering bogie, with wheels with a diameter of 0,92m (3.018ft), and six-coupled driving wheels, with wheels with a diameter of 1.75m (5.74ft). The movement of the driving wheels is driven by two independant Walschaert valve gears, one acting with the high pressure cylinders and the other for the low pressure. The driving of the machine was on the right.
The 3400s have a Belpair fire box of an area of 2.53m² (21.5ft²), which heats a boiler stamped at 16 bars (232 psi), the whole offering a total heating surface of 205m² (2,206ft²) (before the rebuilt of the 63 locomotives and for the non-rebuilt locomotives), and 140m² (1,506ft²) to 150m² (1,614ft²) (for the locomotives after rebuilt of 63 locomotives). They were fitted with an exhaust with valves. The regulator dome was located between the second and the third ferrule of the locomotive, while the sandpit could be found on the fourth ferrule of the locomotives.
Between 1932 and 1937, 63 locomotives of the class have been rebuilt:
- Installation of a Schmidt, Mestre, DM3 or DM4 superheater, depending of the locomotive;
- Replacement of the original HP flat drawers for cylindrical dispensers with admissions by external edges, fitted on 65 locomotives (the 63 rebuilt locomotives, plus nos. 3425 and 3461.
- Instead of the previous modifications, some locomotives would have their original cylinders being modyfied (for 25 locomotives), or by receiving new HP cylinders, requiring to raise the footplate at the level of the cylinders.
- Replacement of the exhaust with valves with a 6-jets trefoil-type exhaust, with the exception of no. 3488 which received instead a Bourges exhaust whithout smoke deflectors.
- Replacement of the original air compressor for a double air compressor Fives Lille-type.
- Replacement of the original starting system by triangle and lever with a new one with skylights and a compressed air servo motor.
- Replacement of the original aspirating injectors for new injectors in charge, placed under the driving cab, on the side of the fireman.
Tenders[]
During their working life, the 3400s have been coupled to three tenders:
- Est nos. 2001 to 2065 (future SNCF 13.A.1 to 65), 2-axles tenders that could carried 13m² (2,859.61 UK Gal; 3,434.21 US Gal) of water and 5t (4.92 UK t; 5.51 US t) of coal;
- Est nos. 2066 to 2105 (future SNCF 13.B.66 to 105), 2-axles tenders that could carried 13m² (2,859.61 UK Gal; 3,434.21 US Gal) of water and 5t (4.92 UK t; 5.51 US t) of coal;
- Est nos. 4002 to 4095 and 2106 to 2232 (future SNCF 13.C.2 to 90 and 106 to 232), 2-axles tenders that could carried 13m² (2,859.61 UK Gal; 3,434.21 US Gal) of water and 7t (6.88 UK t; 5.51 US t) of coal.
History[]
During the late 1890s, the Est Railway showed the need to acquire powerfull locomotives to could tackle the heaviest trains of the network. Intreasted by the Baden 4-6-0s of the class IV e and the class 3.078 to 3.354 designed by the SACM, Louis Salomon, the chief mechanical engineer of the railway, decided to produce a class of 4-6-0 similar.
EST class 11 Nos. 3401 to 3500[]
Delivered between 1897 and 1902, the new locomotives built by the workshops of the Est railway at Épernay. They formed the class X type 62, and received the numbers 3401 to 3500. These locomotives had the particularity for having be built before the conception of a prototype. However, despite being designated as mixed traffic class, these locomotives could have be seen ahead of the heaviest express passenger trains,
During the 1930s, the locomotives that were starting to blow up were rebuilt for 63 of them at the Épernay Workshops, between 1932 and 1937.
SNCF 1-230.A.401 to 500[]
In 1938, every locomotives have been incorporated in the Eastern region roster and became the class SNCF 1-230.A.401 to 500. Around 1942, the non-rebuilt engines were withdrawn from service. From 1947, began the withdrawn of the rebuilt engines, which would continue until 1955.
Gallery[]
EST No. 3457
Sources[]
- GILLOT, Jean, Les locomotives à vapeur de la S.N.C.F. région Est, Éditions Picador, Levallois-Perret, 1976.