This article is about the 5 locomotives rebuilt in 1938/9 from the 3150 Class. For the 40 locomotives built in 1903–06 as the 3100 class, see
GWR 5100 Class.
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 1⁄2 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 1⁄4 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) |
---|
|
|
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Withdrawn |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
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.
References
- 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.