GWR 2021 Class

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GWR 2021 Class
Berkeley Road station geograph-2566416-by-Ben-Brooksbank.jpg
No. 2080 at Berkeley Road station 1948
Type and origin
Power typeSteam
Designer George Armstrong
Builder Wolverhampton, GWR [1]
Order numberLots: D3, F3, G3, H3, J3, K3, L3, M3 [1]
Serial numberWorks Nos: 625–764 [1]
Build date1897 (1897)– 1905 [1]
Total produced140 [1]
Specifications
Configuration:
​
 •  Whyte 0-6-0 ST [1]
Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.4 ft 1+1⁄2 in (1.257 m) [1]
Wheelbase 7 ft 4 in (2.24 m) + 7 ft 4 in (2.24 m), total 14 ft 8 in (4.47 m) [1]
Length30 ft 1 in (9.17 m) over buffers [2]
Width8 ft 2 in (2.49 m) [2]
Height11 ft 10+3⁄8 in (3.62 m) [2]
Frame type
  • Type: Inside [3]
  • Length: 25 ft 8 in (7.82 m)
  • Width: 7 ft 7 in (2.31 m) [2]
Axle load 13 long tons 12+3/4 cwt (29,200 lb or 13.3 t)
(13.9 t; 15.3 short tons) full [1]
Loco weight40 long tons 13+3/4 cwt (89,700 lb or 40.7 t)
(41.3 t; 45.6 short tons) full [1]
Fuel type Coal
Water cap.1,000 imp gal (4,500 L; 1,200 US gal) [1]
Firebox:​
 • Grate area14.5 sq ft (1.35 m2) [1]
Boiler:
​
 • ModelGWR 2021 [4]
 • Pitch6 ft 0+3⁄4 in (1.848 m) [1]
 • DiameterBarrel: 10 ft 0 in (3.05 m)
Outside diameter: 3 ft 9+7⁄8 in (1.165 m) and 3 ft 9 in (1.14 m)
Boiler pressure150 lbf/in2 (1.03 MPa) [1]
Heating surface:​
 • Firebox92.5 sq ft (8.59 m2) [1]
 • Tubes926.25 sq ft (86.051 m2) [1]
 • Total surface1,018.75 sq ft (94.645 m2) [1]
Cylinders Two, inside
Cylinder size
Loco brake Steam [5]
Performance figures
Tractive effort 16,830 lbf (74.86 kN) [1]
Career
Operators Great Western Railway
British Railways
Class 2021
Number in class140
Numbers2021–2160 [1]
Locale Western Region
Withdrawn1944–57 [6]
DispositionAll scrapped
GWR 2101 Class (differences from 2021 Class)
Specifications
Axle load 14 long tons 6 cwt (32,000 lb or 14.5 t)
(14.5 t; 16.0 short tons) full [7]
Loco weight41 long tons 0 cwt (91,800 lb or 41.7 t)
(41.7 t; 45.9 short tons) full [7]
Firebox:​
 • Grate area14.7 sq ft (1.37 m2) [7]
Boiler
  • Outside diameter: 3 ft 10 in (1.17 m) and 3 ft 9 in (1.14 m) [7]
Boiler pressure165 lbf/in2 (1.14 MPa) [7]
Heating surface:​
 • Firebox95.81 sq ft (8.901 m2) [7]
 • Tubes958.32 sq ft (89.031 m2) [7]
 • Total surface1,054.13 sq ft (97.932 m2) [7]
Performance figures
Tractive effort 18,515 lbf (82.36 kN) [7]
Career
Class 2101

The GWR 2021 Class was a class of 140 0-6-0 ST steam locomotives. They were built at the Wolverhampton railway works of the Great Western Railway between 1897 and 1905. 1897 was the very year of George Armstrong's retirement, so it is uncertain if the design should be attributed to him or to his superior at Swindon, William Dean.

Contents

In fact the 2021s were simple enlargements of the Armstrong-designed 850 class of 1874. The changes were fundamentally confined to a longer wheelbase to permit fitting of a larger firebox.

History

The class was built in eight batches:

Rebuilding with Belpaire fireboxes commenced in the early years of the Churchward era. Unsuccessful attempts to form a saddle tank around the firebox directly led to the switch to pannier tanks. The first pannier tank conversions occurred in 1912, and rebuilding of the majority of the class took place over many years – the last conversion was in 1948, and some were still saddle tanks when withdrawn. [8] In their final form, with or without fully enclosed cabs, 110 of them survived into British Railways ownership, the last of them being retired in 1959. [9] They were superseded by the short-lived GWR 1600 Class, nominally a Hawksworth design, but in reality a straightforward update of the then 75-year-old design, with new boiler, bigger cab and bunker.

Coachwork

When autotrains were introduced on the GWR, a trial was made of enclosing the engine in coachwork to resemble the coaches. Nos 2120 and 2140 of this class were so equipped in 1906, as were two 517 class 0-4-2Ts. The experiment was unpopular with engine crews, and the bodywork removed in 1911. [10] [11]

See also

Related Research Articles

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<span class="mw-page-title-main">GWR 1901 Class</span> Class of 120 small 0-6-0ST steam locomotives

The GWR 1901 Class was a class of 120 small 0-6-0ST steam locomotives. Numbered 1901–2020, they were designed by George Armstrong and built at the Wolverhampton railway works, England, of the Great Western Railway between 1881 and 1895. They had wheels of 4 ft 0 in (1.219 m) diameter and a coupled wheelbase of 13 ft 8 in (4.17 m).

<span class="mw-page-title-main">GWR 645 and 1501 Classes</span>

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<span class="mw-page-title-main">GWR 1854 Class</span>

The GWR 1854 Class was a class of 0-6-0T steam locomotives designed by William Dean and constructed at the Swindon Works of the Great Western Railway. The class used similar inside frames and chassis dimensions to the 1813 Class of 1882-4. In this they differed from the intervening 1661 Class, which had reverted to the double frames of the Armstrong era. Thus the 1854 Class belongs to the "mainstream" of GWR 0-6-0T classes that leads towards the larger GWR pannier tanks of the 20th century.

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 le Fleming 1958, p. E50.
  2. 1 2 3 4 Whitehurst 1973, p. 152.
  3. ↑ le Fleming 1958, p. E5.
  4. ↑ Champ, Jim (2018). An Introduction to Great Western Locomotive Development. Barnsley: Pen & Sword Transport. p. 319. ISBN   978-1-4738-7784-9. OCLC   1029234106. OL   26953051M.
  5. ↑ le Fleming 1958, p. E11.
  6. ↑ Whitehurst 1973, pp. 21–23.
  7. 1 2 3 4 5 6 7 8 9 le Fleming 1958, p. E51.
  8. ↑ le Fleming 1958, pp. E53–E55.
  9. ↑ "2069". 31 December 2013.
  10. ↑ Darkin, Peter. "BRANCH LINES October 2019". svrlive. Retrieved 15 June 2022.
  11. ↑ 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.

Sources


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