GWR 103 President

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GWR 103 President and GWR 104 Alliance
GWR de Glehn compound locomotive 104 Alliance (Howden, Boys' Book of Locomotives, 1907).jpg
104, Alliance
Type and origin
Power typeSteam
Designer G.J. Churchward
Builder Société Alsacienne de Constructions Mécaniques
Order number Swindon Lot 157 [1]
Serial numberSACM: 5601–5602
Swindon 2126–2127 [1]
Build date1905
Specifications
Configuration:
​
 •  Whyte 4-4-2
 •  UIC 2′B1 n4v
Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia. 3 ft 2 in (965 mm) [2]
Driver dia.6 ft 8+1⁄2 in (2,045 mm) [2]
Trailing dia. 4 ft 8+3⁄8 in (1,432 mm) [2]
Fuel type Coal
Cylinders Four – compound: [3]
  • two HP outside
  • two LP inside
High-pressure cylinder14+3⁄16 in × 25+3⁄16 in (360 mm × 640 mm) [2]
Low-pressure cylinder23+5⁄8 in × 25+3⁄16 in (600 mm × 640 mm) [2]
Valve gear Walschaerts'
Career
Operators Great Western Railway
Numbers103 and 104
Official namePresident and Alliance
DispositionBoth scrapped

President, number 103, and Alliance, number 104 were locomotives of the Great Western Railway. George Jackson Churchward, Chief Mechanical Engineer of the Great Western Railway, was given authority to purchase three French de Glehn-du Bousquet four-cylinder compound locomotives, in order to evaluate the benefits of compounding. The first locomotive, no.102 La France, was delivered in 1903. Two further locomotives, nos. 103 and 104, were purchased in 1905. These were similar to the Paris-Orleans Railway's 3001 class, and slightly larger than 102. [4] As with no. 102, these were built by Société Alsacienne de Constructions Mécaniques. [5] They had two low-pressure cylinders fitted between the frames, and two high-pressure cylinders outside. The low-pressure cylinders drove the front driving wheels while the high-pressure cylinders drove the rear driving wheels. [3] An external steam pipe was mounted just in front of the dome, looking rather similar in appearance to a top feed. In 1907 No. 104 was fitted with an unsuperheated Swindon No. 1 boiler, [6] President herself being similarly reboilered in February 1910 and receiving a superheated boiler in January 1914. [7] In 1926, the three locomotives were based at Oxford shed. [8] In practice, they did not provide any significant improvement in either performance or economy compared to No 171 Albion, Churchward's prototype 4-6-0, which was converted to a 4-4-2 specifically for comparison with the French locomotives. [9]

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References

  1. 1 2 Allcock et al. (1968), p. 30.
  2. 1 2 3 4 5 le Fleming 1960, p. H5
  3. 1 2 le Fleming 1960 , pp. H4, H5
  4. ↑ Haresnape & Swain 1993 , p. 22
  5. ↑ Freezer, Cyril (October 1971). "La France". Railway Modeller. Vol. 22, no. 252. Seaton, Devon: Peco Publications and Publicity Ltd. p. 334.
  6. ↑ Rogers 1975 , p. 133
  7. ↑ Nock 1975 , p. 75
  8. ↑ "Trains in the vale". Pendon Museum. Archived from the original on 26 June 2008. Retrieved 2008-11-12.
  9. ↑ Foster, Richard (November 2007). "Churchward: The man and his machines". Steam Railway. Peterborough: EMAP Ltd (342): 66–72.

Bibliography

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