GWR 3150 Class

4 ft 8+1⁄2 in (1,435 mm) standard gaugeLeading 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 buffersLoco 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) fullFuel typeCoalWater cap.2,000 imp gal (9,100 L; 2,400 US gal)Firebox:​ • Grate area20.56 sq ft (1.910 m²)BoilerGWR Standard No. 4Boiler pressure200 lbf/in² (1.38 MPa)Heating surface:​ • Firebox128.72 sq ft (11.958 m²) • Tubes1,349.64 sq ft (125.386 m²)CylindersTwo, outsideCylinder size18+1⁄2 in × 30 in (470 mm × 762 mm)Valve gearStephensonValve typePiston valvesTrain brakesVacuum

Performance figures
Tractive effort	25,670 lbf (114.2 kN)

Career
Power class	4MT
Number in class	41
Numbers	3150-3190
First run	1907

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

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]

Year	Quantity	Lot No.	Works Nos.	Locomotive numbers	Notes
1906	1	159	2157	3150
1907	20	169	2239–2258	3151–3170
1907–08	20	172	2280–2299	3171–3190

See also

• GWR 3100/5100 Class (1906)
• GWR 5101 Class
• GWR 6100 Class
• GWR 3100 Class (1938)
• GWR 8100 Class
• List of GWR standard classes with two outside cylinders

References

• 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.

External links

• The Great Western Archive
• Class 3150 Details at Rail UK