GWR 3150 Class

The Great Western Railway (GWR) 3150 Class was a class of 2-6-2T side tank steam locomotive.

GWR 3150 Class [1]
3171 at Gloucester (Horton Road) Depot 1948
Type and origin
Power typeSteam
DesignerGeorge Jackson Churchward
BuilderGWR Swindon Works
Order numberLots 159, 169, 172
Serial number2157, 2239–2258, 2280–2299
Build date1906–1908
Total produced41
Specifications
Configuration:
​
 • Whyte2-6-2T
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.3 ft 2 in (0.965 m)
Driver dia.5 ft 8 in (1.727 m)
Trailing dia.3 ft 8 in (1.118 m)
Length41 ft 0 in (12.50 m) over buffers
Loco weight64 long tons 13 cwt (144,800 lb or 65.7 t)
(65.7 t; 72.4 short tons) empty
81 long tons 12 cwt (182,800 lb or 82.9 t)
(82.9 t; 91.4 short tons) full
Fuel typeCoal
Water cap.2,000 imp gal (9,100 L; 2,400 US gal)
Firebox:
 • Firegrate area		20.56 sq ft (1.910 m2)
BoilerGWR Standard No. 4
Boiler pressure200 lbf/in2 (1.38 MPa)
Heating surface:
 • Tubes		1,349.64 sq ft (125.386 m2)
 • Firebox128.72 sq ft (11.958 m2)
CylindersTwo, outside
Cylinder size18+1⁄2 in × 30 in (470 mm × 762 mm)
Valve gearStephenson
Valve typePiston valves
Train brakesVacuum
Performance figures
Tractive effort25,670 lbf (114.2 kN)
Career
Power class4MT
Number in class41
Numbers3150-3190
First run1907

History

Churchward based the 3150 class on his 3100 (later 5100) class. They used the larger and heavier Standard 4 boiler and so had greater boiler capacity, but were consequently heavier and thus restricted to Red routes. They were principally heavy suburban passenger traffic engines. Five of the class were rebuilt into the Collett 3100 Class. None of the class were preserved.

Table of orders and numbers[2]
YearQuantityLot No.Works Nos.Locomotive numbersNotes
1906115921573150
1907201692239–22583151–3170
1907–08201722280–22993171–3190

See also

References
  1. GWR Engines - Names, Numbers, Types, Classes, ETC. of Great Western Railway Locomotives. Great Western Railway. 1938. p. 70.
  2. Allcock et al. (1968), pp. 30–31.
  • Allcock, N. J.; Davies, F. K.; le Fleming, H. M.; Maskelyne, J. N.; Reed, P. J. T.; Tabor, F. J. (1968) [1951]. White, D. E. (ed.). The Locomotives of the Great Western Railway, part one: Preliminary Survey. Kenilworth: RCTS.


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