Sunday, April 8, 2018

Est 4003 to 4175

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Est 4003 to 4175

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'''Est 4003 to 4175''' was a class of 173 French [[Compound locomotive|compound]] [[2-8-0]] locomotives built in the early years of the 20th century for the ''[[Chemins de fer de l'Est]]''. They were built to handle the increasing output of the steel industry in the Lorraine area.

== Origins ==
The locomotives were developments of the prototypes 4001 et 4002 which had been built for the Est by [[Société Alsacienne de Constructions Mécaniques|Société alsacienne de constructions mécaniques]] (SACM) in 1902. They were built in three batches, with the first two built by the Est's Épernay Works, and the third built by the various private contractors:

* The first series, 4003 to 4017, entered service in 1905–1906 and were identical to the prototypes 4001 and 4002.
* The second series, 4018 to 4070, entered service between 1907 and 1909 and only differed from the first batch due to alterations in the steam passages.
* The third and last series, 4071 to 4175, were delivered between 1911 and 1914 and were fitted with a 21-element Schmidt superheater.

== Usage and services ==
Being designed to haul heavy trains, they were allocated to many of the depots in Eastern France, like Nancy, Bar-le-Duc, Reims, Troyes, Saint-Dizier, Vesoul, Belfort, Châlons, and others. On an easy grade, the superheated locomotives were able to move a 1200- to 1500-tonne train at 40 to 45 km/h, with peaks of 50 km/h possible. They could pull a  340-tonne train at <span title="5,555 56 m/s">20</span> <abbr class="abbr" title="kilomètre par heure">km/h</abbr> up a 20.0 to 22.5 per mille grade.

== Description ==
The '''[[2-8-0|Consolidations]]''' were four-cylinder compound locomotives with [[Walschaerts valve gear]].  They were provided with a Belpaire firebox, Adams valves, and an Est-type horizontal regulator.

== Tenders ==
Originally these were two-axle tenders which held 13000 litres of water and 5 tonnes of coal; they had a gross weight in working order of 33.5 tonnes. The 4091 to 4175 were equipped from new with three-axle tenders with a capacity of 22000 litres of water and 8 tonnes of coal; wieght in working order was  50.6 tonnes. These tenders were gradually assigned to the earlier locomotives.

== Characteristics ==

* Grade area: 2.8 m² <span></span>
* Heating surface area: 239 m² (4003 – 4070), 153 m² (4071 – 4175)
* Superheater surface area: Nil (4003 – 4070), 37 m² (4071 – 4175)
* Number of cylinders : 2 HP, 2 LP
* Cylinder diameter HP : 390 mm (4003 – 4070), 415 mm (4071 – 4175)
* Cylinder stroke HP : 650 mm
* Cylinder diameter LP : 600 mm (4003 – 4070), 635 mm (4071 – 4175)
* Cylinder stroke BP : 650 mm
* Boiler pressure : 16 kg/cm²
* Driving wheel diameter : <span>1400 mm</span>
* Leading wheel diameter: <span> </span>850 mm
* Weight in working order: <span></span> 74.4 tonnes
* Adhesive weight <span></span> 65 – 65.8 tonnes
* Overall length (loco only): 11.37 m
* Maximum theoretical tractive effort<span> </span>: 222 kN (4003 – 4070), 251 kN (4071 – 4175)
* Maximum practical tractive effort: 195 kN
* Maximim speed: <span></span> 75 km/h

Tender:

* Water capacity : 13,000 litres (4003 – 4090), 22000 litres (4091 – 4175)
* Coal capacity : 5 tonnes (4003 – 4090), 8 tonnes (4091 – 4175)
* Weight in working order: <span></span> 33 tonnes (4003 – 4090), 50 tonnes (4091 – 4175)
* Length of tender <span>:</span> 7.633 m (4091 – 4175)
* Length of loco and tender: 19.003 m (4091 – 4175)

=== References ===

* Lucien-Maurice Vilain, « L'Évolution des locomotives à vapeur de la compagnie des chemins de fer de l'Est 1853-1938 », 1980, éditions Pygmalion,
* Jean-Paul Geai, « Les Consolidation 4001 à 4175 de la Compagnie de l'Est », ''Le Train'', n°294, 295 et 296, octobre, novembre et décembre 2012.

[[Category:Chemins de fer de l'Est locomotives|004003]]
[[Category:2-8-0 locomotives]]
[[Category:Steam locomotives of France]]
[[Category:Railway locomotives introduced in 1905]]
[[Category:Standard gauge locomotives of France]]

April 09, 2018 at 01:19AM

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