GWR 4300 Class

Great Western Railway 4300 Class
6304 at Over Junction, Gloucester, in 1962
Type and origin
Power typeSteam
Builder
Order numberLots 183, 193, 194, 198, 202, 204–209, 211, 212, 218, 222, 230, 276
Serial number
  • Swindon: 2396–2415, 2516–2535, 2552–2571, 2612–2631, 2652–2761, 2790–2841, 2887–2906
  • RS&C: 3802–3836
Build date1911–1932
Total produced342
Specifications
Configuration:
 • Whyte2-6-0
 • UIC1′C h2
Gauge4 ft 8+12 in (1,435 mm) standard gauge
Leading dia.3 ft 2 in (0.965 m)
Driver dia.5 ft 8 in (1.727 m)
Minimum curve6 chains (400 ft; 120 m) normal,
5 chains (330 ft; 100 m) slow
Length58 ft 1+14 in (17.71 m)
Width8 ft 11 in (2.718 m)
Height13 ft 0 in (3.962 m)
Axle load17.60 long tons (17.88 t; 19.71 short tons)
Adhesive weight52 long tons 0 cwt (116,500 lb or 52.8 t)
(52.8 t; 58.2 short tons)
Loco weight62 long tons 0 cwt (138,900 lb or 63 t)
(63.0 t; 69.4 short tons)
Tender weight40 long tons 0 cwt (89,600 lb or 40.6 t)
(40.6 t; 44.8 short tons)
Fuel capacity7 long tons 0 cwt (15,700 lb or 7.1 t)
(7.1 t; 7.8 short tons)
Water cap.3,500 imp gal (16,000 L; 4,200 US gal)
Firebox:
 • Grate area20.56 sq ft (1.910 m2)
BoilerGWR Standard No. 4
Boiler pressure200 psi (1.38 MPa)
Heating surface:
 • Firebox128.72 sq ft (11.958 m2)
 • Tubes1,349.64 sq ft (125.386 m2)
Superheater:
 • Heating area191.88 sq ft (17.826 m2)
CylindersTwo, outside
Cylinder size18+12 in × 30 in (470 mm × 762 mm)
Performance figures
Tractive effort25,670 lbf (114.19 kN)
Career
OperatorsGreat Western Railway,
British Railways
Power classGWR: D; BR: 4MT
Numbers4300–4399, 5300–5399, 6300–6399, 7300–7321, 9300–9319
Axle load classGWR: 4300–7300s Blue; 8300–9300s: Red
LocaleGreat Britain
First run1911
Withdrawn1936–1964
DispositionTwo preserved, remainder scrapped

The Great Western Railway (GWR) 4300 Class is a class of 2-6-0 (mogul) steam locomotives, designed by G.J. Churchward for mixed traffic duties. 342 were built from 1911–1932.