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GWR 517 Class

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GWR 517 class
Type and origin
Power typeSteam
DesignerGeorge Armstrong
BuilderGWR Wolverhampton Works
Order numberLots D, E, F, G, H, I, R, S, W, Z, C2, M2, P2
Build date1868–1885
Total produced156
Specifications
Configuration:
 • Whyte0-4-2T
 • UICB1 n2t
Gauge4 ft 8+12 in (1,435 mm) standard gauge
Driver dia.5 ft 0 in (1.524 m) or 5 ft 2 in (1.575 m)
Trailing dia.3 ft 8 in (1.118 m)
Wheelbase15 ft 6 in (4.72 m)
Length28 ft 4+58 in (8.65 m)
Width8 ft 2 in (2.49 m)
Height12 ft 1+58 in (3.70 m)
Axle load12 long tons 16 cwt (28,700 lb or 13 t)
13.0 t; 14.3 short tons full
Adhesive weight24 long tons 16 cwt (55,600 lb or 25.2 t)
25.2 t; 27.8 short tons full
Loco weight35 long tons 4 cwt (78,800 lb or 35.8 t)
35.8 t; 39.4 short tons full
Fuel typeCoal
Water cap.620 imp gal (2,800 L; 740 US gal)
Firebox:
 • Grate area12.83 sq ft (1.192 m2)
Boiler
  • GWR 517
  • GWR 2021[1]
Boiler pressure150 psi (10.34 bar; 1.03 MPa) or
165 psi (1.14 MPa)
Heating surface:
 • Firebox83.14 sq ft (7.724 m2)
 • Tubes904.47 sq ft (84.028 m2)
SuperheaterNone
CylindersTwo, inside
Cylinder size15 in × 24 in (381 mm × 610 mm), later
16 in × 24 in (406 mm × 610 mm)
Valve gearStephenson
Valve typeSlide valves
Performance figures
Tractive effort12,635–14,780 lbf (56.20–65.74 kN)
Career
OperatorsGreat Western Railway
Class517
Power classUnclassified
Axle load classUnclassified
Withdrawn1904–1945
DispositionAll scrapped

The 517 Class were small 0-4-2T tank engines designed by George Armstrong for local passenger work on the Great Western Railway.[2] They were built at Wolverhampton Works and were outshopped between 1868 and 1885. They were built in thirteen lots commencing with 517–528 and ending with 1477–1488 in 1884–1885.

Dimensions

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The class was far from uniform and encompassed three different wheelbases, saddle and side tanks, and various boilers to name just a few variations. Driving wheels were 5 ft 0 in (1.524 m) (later 5 ft 2 in or 1.575 m due to thicker tyres), cylinders 15 in × 24 in (381 mm × 610 mm), (later 16 in × 24 in or 406 mm × 610 mm) and boiler pressure 150 psi (1.03 MPa) (later 165 psi or 1.14 MPa).

Summary table

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Table of GWR 517 class orders[3]
Year Lot Quantity GWR No. Wheelbase Trailing axleboxes Tanks
1868 D 6 517–522 13 ft 7 in (4.14 m) Inside Saddle
1868 D 6 523–528 13 ft 8 in (4.17 m)
1868–69 E 12 529–540
1869 F 12 541–552
1869 G 12 553–564 14 ft 8 in (4.47 m)
1869–70 H 6 565–570
1870 H 6 571–576 Side
1873–74 R 12 826–837 15 ft 0 in (4.57 m)
1874–75 S 12 838–849
1875–76 W 12 1154–1165
1876 Z 12 202–205, 215–222
1877 I 12 1421–1432
1877–78 C2 12 1433–1444
1883 M2 12 1465–1476
1884–85 P2 6 1477–1482
1885 P2 6 1483–1488 15 ft 6 in (4.72 m) Outside

When new, the first sixty were numbered 1040–87 (Lots D to G inclusive) and 1100–11 (Lot H); they were renumbered 517–576 in July 1870.[4]

History

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1473 Fair Rosamund

The earlier ones were rebuilt from saddle tanks while the later ones were built as side tanks from the beginning. The 3571 Class were very closely related, its prototype being a minor rebuild of 517 class No. 1477 in 1895. Then ten new locos followed in the next two years. Returning to the 517 class, various bunker and cab combinations also evolved, and after their last rebuilding, the locos with enclosed cabs and large bunkers were effectively the progenitors of Collett's 4800 class. In 1898, No. 1473 was named Fair Rosamund, to work a royal train on the Blenheim and Woodstock branch line. The locomotive was then regularly used for the Woodstock branch in subsequent years.

The Armstrong brothers

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The independence of the brothers Armstrong is aptly symbolised by the fact that Joseph at Swindon preferred the 2-4-0T wheel arrangement (the 455 Class "Metro" Tanks) to the 0-4-2; George, on the other hand, built no 2-4-0Ts at Wolverhampton.

Use

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In the 19th century, the 517s were principally Northern Division engines, and when new worked the Birmingham and Wolverhampton suburban traffic. Under Churchward the situation changed: about half of the class was fitted for autotrain working, and these engines were regularly maintained and moved around the system where needed; while the other, unconverted engines were demoted and became little more than shunters. Nevertheless as late as the 1920s the class was found in almost all parts of the GWR system. Most of the class ran between a million and a million and a half miles (2,400,000 km), No. 1163 holding the record at 1,652,661. None of the 517s were preserved, the last survivor No. 848 being scrapped in 1945 at the age of 70.[5]

Coachwork

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When autotrains were introduced on the GWR, a trial was made of enclosing the engine in coachwork to resemble the coaches. Nos 533 and 833 of this class were so equipped in 1906, as were two 2021 class 0-6-0Ts. The experiment was unpopular with engine crews, and the bodywork was removed in 1911.[6][7]

Accidents and incidents

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Notes

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  1. ^ Champ (2018), p. 319.
  2. ^ Holcroft (1971), pp. 34–35.
  3. ^ Tabor (1959), pp. F9–F11.
  4. ^ Tabor (1959), pp. F9, F19.
  5. ^ Tabor (1959), p. F9-F20.
  6. ^ Darkin, Peter. "BRANCH LINES October 2019". svrlive. Retrieved 15 June 2022.
  7. ^ Norris, John (1987). Edwardian enterprise : a review of Great Western Railway development in the first decade of this century. Didcot: Wild Swan. p. 127. ISBN 0906867398.
  8. ^ Vaughan (1989), pp. 29–32.

References

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