GWR 2021 Class

GWR 2021 Class
No. 2080 at Berkeley Road station 1948
Type and origin
Power typeSteam
DesignerGeorge Armstrong
BuilderWolverhampton, 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:
​
 • Whyte0-6-0ST[1]
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.4 ft 1+1⁄2 in (1.257 m)[1]
Wheelbase7 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 load13 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 typeCoal
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]
CylindersTwo, inside
Cylinder size
Loco brakeSteam[5]
Performance figures
Tractive effort16,830 lbf (74.86 kN)[1]
Career
OperatorsGreat Western Railway
British Railways
Class2021
Number in class140
Numbers2021–2160[1]
LocaleWestern Region
Withdrawn1944–57[6]
DispositionAll scrapped
GWR 2101 Class (differences from 2021 Class)
Specifications
Axle load14 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 effort18,515 lbf (82.36 kN)[7]
Career
Class2101

The GWR 2021 Class was a class of 140 0-6-0ST 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.

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.

  1. ^ a b c d e f g h i j k l m n o p q r s t le Fleming 1958, p. E50.
  2. ^ a b c d 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. ^ a b c d e f g h i le Fleming 1958, p. E51.