GWR 2221 Class

The Great Western Railway (GWR) 2221 Class or County Tank was a class of 4-4-2T steam locomotive, effectively a tank engine version of the 3800 "County" Class 4-4-0 tender locomotives. The two classes had different boilers, standard no 4 for the tender locomotive, and the smaller (by about 350 sq ft or 33 m2) standard no 2 for the tank. 2230 was fitted with the larger boiler when new, but this was unsuccessful and was quickly altered.

For other GWR engine classes called 'County', see GWR County Class.
GWR 2221 "County Tank" Class
GWR County Tank Class No.2221 in 1907
Type and origin
Power typeSteam
DesignerGeorge Jackson Churchward
BuilderSwindon Works
Order numberLots 151, 175, 188
Serial number2076–2085, 2320–2329, 2466–2475
Build date1905–1909, 1912
Total produced30
Specifications
Configuration:
​
 • Whyte4-4-2T
 • UIC2′B1 ht
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.6 ft 8+1⁄2 in (2.045 m)
Fuel typeCoal
Firebox:​
 • Grate area20.35 sq ft (1.89 m2)
Boiler:
​
 • TypeGWR Standard No. 2
Boiler pressure200 lbf/in2 (1.38 MPa)
Heating surface:​
 • Firebox121.31 sq ft (11.27 m2)
 • Tubes and flues1,396.58 sq ft (129.75 m2)
 • Total surface1,517.89 sq ft (141.02 m2)
Superheater:
​
 • Heating area184.75 sq ft (17.164 m2)
CylindersTwo, outside
Cylinder size18 in × 30 in (457 mm × 762 mm)
Performance figures
Tractive effort20,530 lbf (91.32 kN)
Career
OperatorsGreat Western Railway
Numbers2221–2250
Withdrawn1931–1934
DispositionAll scrapped
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