GWR 3100 Class

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GWR 3100 Class
Type and origin
Power type Steam
Designer Churchward
(rebuilt by Collett)
Builder GWR Swindon Works
Order number Lot 319
Build date 1906
Rebuild date 1938
Number rebuilt 5
Specifications
Configuration:
 • Whyte 2-6-2T
 • UIC 1'C1 ht
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Leading dia. 3 ft 0 in (0.914 m)
Driver dia. 5 ft 3 in (1.600 m)
Trailing dia. 3 ft 8 in (1.118 m)
Minimum curve 6 chains (396 ft; 121 m) normal,
5 chains (330 ft; 101 m) slow
Length 41 ft 0 in (12.50 m) over buffers
Width 8 ft 11 14 in (2.724 m)
Height 13 ft 2 in (4.013 m)
Axle load 19 long tons 3 cwt (42,900 lb or 19.5 t)
(21.4 short tons) full
Adhesive weight 57 long tons 6 cwt (128,400 lb or 58.2 t)
(64.2 short tons) full
Loco weight 81 long tons 9 cwt (182,400 lb or 82.8 t)
(91.2 short tons) full
Fuel type Coal
Water cap 2,000 imp gal (9,100 l; 2,400 US gal)
Firebox:
 • Firegrate area
20.56 sq ft (1.910 m2)
Boiler pressure 225 lbf/in2 (1.55 MPa)
Heating surface:
 • Tubes
1,349 sq ft (125.3 m2)
 • Firebox 128.72 sq ft (11.958 m2)
Superheater:
 • Type 4-element or 6-element
 • Heating area 4-element: 136.64 sq ft (12.694 m2),
6-element: 181.10 sq ft (16.825 m2)
Cylinders Two, outside
Cylinder size 18.5 in × 30 in (470 mm × 762 mm)
Performance figures
Tractive effort 31,170 lbf (138.7 kN)
Career
Operators GWR » BR
Class 3100
Power class GWR: D,
BR: 4MT
Numbers 3100–3104
Axle load class GWR: Red
Withdrawn 1957–1960
Disposition All scrapped

The Great Western Railway (GWR) 3100 Class was a class of 2-6-2T side tank steam locomotive.

History[edit]

This class of large prairie was created in 1938 when Collett rebuilt some of Churchward's 3150 Class with a view to using them as bankers, particularly from Severn Tunnel Junction shed. These engines used the standard class 4 boiler again, but pressed to 225 psi (1,550 kPa). and using smaller coupled wheels of 5 feet 3 inches (1.600 m) diameter, and one-half inch (13 mm) increase in cylinder diameter, nominal tractive effort rose to 31,170 pounds (14,140 kg). Almost impossible to pick out was a 2 in (50.8 mm) reduction in pony truck wheel diameter to 3 ft 0 in (914 mm). Only five engines were ever modified, namely 3173, 3156, 3181, 3155 and 3179 which were rebuilt as 3100 to 3104 respectively. None of these were preserved.

See also[edit]

References[edit]

  • Whitehurst, Brian (1973). Great Western engines, names, numbers, types, classes: 1940 to preservation. Oxford: Oxford Publishing Company. pp. 30, 102, 135. ISBN 0-902888-21-8. OCLC 815661. 

External links[edit]