Est 501 to 562

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Est 501 to 562
Est 501 to 510
Type and origin
Power typeSteam
DesignerM. Regray
Build date1878–1886
Total produced62
Specifications
Configuration:
​
 • Whyte2-4-0
 • UIC1B n2
Gauge1,435 mm (4 ft 8+1⁄2 in)
Leading dia.1,350 mm (4 ft 5+1⁄8 in)
Driver dia.
  • 501–510: 2,310 mm (7 ft 7 in)
  • 511–562: 2,110 mm (6 ft 11+1⁄8 in)
Wheelbase5.35 m (17 ft 6+3⁄4 in)
Length
  • 501–510: 8.43 m (27 ft 7+7⁄8 in)
  • 543–562: 8.93 m (29 ft 3+5⁄8 in)
Adhesive weight28.7–29 t (63,300–63,900 lb)
Loco weight41.8–42.8 t (92,200–94,400 lb)
Firebox:​
 • Grate area
  • 501–510: 1.73 m2 (18.6 sq ft)
  • 543–562: 2.39 m2 (25.7 sq ft)
Boiler pressure10 kg/cm2 (0.981 MPa; 142 psi)
Heating surface
  • 501–510: 100 m2 (1,100 sq ft)
  • 543–562: 115 m2 (1,240 sq ft)
CylindersTwo, outside
Cylinder size
  • 501–510: 440 mm × 640 mm (17+5⁄16 in × 25+3⁄16 in)
  • 543–562: 430 mm × 610 mm (16+15⁄16 in × 24 in)
Valve gearGooch
Performance figures
Maximum speed90 km/h (56 mph)
Career
OperatorsChemins de fer de l'Est
Numbers501 – 562
Retired1906–1938

Est 501 to 562 was a class of 62 French 2-4-0 locomotives for express passenger service, built in 1878–1886 for the Chemins de fer de l'Est.

Construction history[edit]

The first series Est 501–510 was built 1878–1879 at the workshops of the Chemins de fer de l'Est in Épernay.[1] The general design of the frame was carried over from the earlier Crampton locomotives, but with an additional coupled axle replacing the second leading axle. The first few machines had a round-top firebox which protruded down between the two driving axles,[2] while the later machines of this series had a Belpaire firebox which extended over the second coupled axle.[3] The boiler tubes had a length of 3.5 m (11 ft 5+3⁄4 in) and the steam regulator was of the Crampton type with the steam pipes running down to the cylinders externally.[4] The Cylinders were placed horizontally on both sides between the double longerons of the frame with the connecting rod directly driving the second driving axle. The driving wheels had a diameter of 2,310 mm (7 ft 7 in).[4]

The second series, comprising Est 511–542, was built in 1881–1882[5] in two subseries at Cail (1881) and Wiener Neustadt (1882).[6] The diameter of the driving wheels was reduced to 2,110 mm (6 ft 11+1⁄8 in), and also the firebox was changed to one with a rounded top which also extended over the second coupled axle.[5] The reversing mechanism of the Gooch valve gear was rearranged.[2] Also the cylinder size was reduced to 430 mm × 610 mm (16+15⁄16 in × 24 in) on the machines Est 523-542.[5][2]

The third and last series, Est 543–562, was built 1884–1885.[2] The main differences compared to the preceding Est 523-542 series was the lengthening of the boiler and boiler tubes, which now had a length of 4.1 m (13 ft 5+3⁄8 in).[2] Also the cylinder size had been increased to 440 mm × 610 mm (17+5⁄16 in × 24 in).[5]

In 1888, two locomotives of the first series, Est 508 and 509, were fitted experimentally with dual drum Flaman boilers with a boiler pressure of 12 kg/cm2 (1.18 MPa; 171 psi).[5] Due to the increased weight the leading axle had been replaced by a two-axle outside-frame bogie. Although these machines apparently did not meet the expectation, they still remained in service until 1925.[5]

In order to increase the available traction, 48 locomotives of the series 511–562 had their driving wheels reduced from 2.11 m (6 ft 11+1⁄8 in) diameter down to 1.85 m (6 ft 7⁄8 in), which was sufficient to pull the local trains on the main and secondary lines. The locomotives were also renumbered to the range 2511–2562.[5]

The series Est 501–510 used a two-axle tender with a capacity of 10 m3 (350 cu ft) water and 2.5 t (5,510 lb) coal and weighing a total of 24 t (52,900 lb), while the series Est 543–562 used a two-axle tender with a capacity of 13 m3 (460 cu ft) water and 3 t (6,610 lb) coal and weighing a total of 29 t (63,900 lb).[5]

Year Qty. Est No. Manufacturer
1878–1879 10 501–510 Épernay Works[1][6]
1881 12 511–522 Société J. F. Cail & Cie[6]
1882 20 523–542 Wiener Neustadt[6]
1884–1885 20 543–562 Épernay Works[2]

References[edit]

Wikimedia Commons has media related to Est 501 to 562.
  1. ^ a b Vilain (1980), pp. 52–56.
  2. ^ a b c d e f Demoulin (1898), pp. 72–75.
  3. ^ Deghilage (1879), pp. 93–96.
  4. ^ a b Vilain (1980), pp. 52–56, 98.
  5. ^ a b c d e f g h Vilain (1980), p. 53.
  6. ^ a b c d Deghilage (1882), pp. 241, 247–248.

Bibliography[edit]

  • 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.
  • Demoulin, Maurice (1898). Traité pratique de la machine locomotive (in French). Vol. 1. Baudry et Cie.
  • Deghilage (2 August 1879). "Locomotives a grande vitesse de l'Exposition Universelle de 1878". Revue générale des chemins de fer (in French). 2, 2e Semestre. Paris: P. Vicq-Dunod: 81–108. OCLC 6536095.
  • Deghilage (4 October 1882). "Note sur les locomotives construites pour les Chemins de fer français, De 1878 à 1881 - Première partie". Revue générale des chemins de fer (in French). 5, 2e Semestre. Paris: P. Vicq-Dunod: 237–265. OCLC 6536095.
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