GWR 3100 Class

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GWR 3100 Class
Type and origin
Power typeSteam
DesignerChurchward
(rebuilt by Collett)
BuilderGWR Swindon Works
Order numberLot 319
Build date1906
Rebuild date1938
Number rebuilt5
Specifications
Configuration:
 • Whyte2-6-2T
 • UIC1'C1 ht
Gauge4 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 curve6 chains (396 ft; 121 m) normal,
5 chains (330 ft; 101 m) slow
Length41 ft 0 in (12.50 m) over buffers
Width8 ft 11 14 in (2.724 m)
Height13 ft 2 in (4.013 m)
Axle load19 long tons 3 cwt (42,900 lb or 19.5 t)
(21.4 short tons) full
Adhesive weight57 long tons 6 cwt (128,400 lb or 58.2 t)
(64.2 short tons) full
Loco weight81 long tons 9 cwt (182,400 lb or 82.8 t)
(91.2 short tons) full
Fuel typeCoal
Water cap2,000 imp gal (9,100 l; 2,400 US gal)
Firebox:
 • Firegrate area
20.56 sq ft (1.910 m2)
Boiler pressure225 lbf/in2 (1.55 MPa)
Heating surface:
 • Tubes
1,349 sq ft (125.3 m2)
 • Firebox128.72 sq ft (11.958 m2)
Superheater:
 • Type4-element or 6-element
 • Heating area4-element: 136.64 sq ft (12.694 m2),
6-element: 181.10 sq ft (16.825 m2)
CylindersTwo, outside
Cylinder size18.5 in × 30 in (470 mm × 762 mm)
Performance figures
Tractive effort31,170 lbf (138.7 kN)
Career
OperatorsGWR » BR
Class3100
Power classGWR: D,
BR: 4MT
Numbers3100–3104
Axle load classGWR: Red
Withdrawn1957–1960
DispositionAll 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 and Classes (1940 to Preservation). Oxford, UK: Oxford Publishing Company. pp. 30, 102, 135. ISBN 978-0-9028-8821-0. OCLC 815661.

External links[edit]