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Est 501 to 562

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.

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

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

 
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  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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