GCR Class 11D
| Great Central Railway Class 11B |
1014 Sir Alexander
|
| Type and origin |
| Power type |
Steam |
| Designer |
John G. Robinson |
| Builder |
|
| Build date |
1901-02 (30), 1904 (10) |
| Total produced |
40 |
|
| Specifications |
Configuration:
|
|
| • Whyte
|
4-4-0 |
| • UIC
|
2'Bn2, later 2'Bh2 |
| Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
| Leading dia. |
3 ft 6 in (1.067 m) |
|
Driver dia. |
6 ft 9 in (2.057 m) |
| Length |
56 ft 5.5 in (17.209 m) |
| Loco weight |
55.7 long tons (56.6 t) |
Firebox:
• Firegrate area |
21.17 sq ft (1.967 m2) |
Boiler:
|
|
| • Diameter |
4 ft 9.5 in (1,460 mm) to 5 ft (1,500 mm) |
| Boiler pressure |
180 psi (1.24 MPa) |
| Heating surface |
1,260 sq ft (117 m2) |
Superheater:
|
|
| • Heating area |
22 elements, 178 sq ft (16.5 m2) |
| Cylinders |
Two, inside |
| Cylinder size |
18.5 in (470 mm) bore
26 in (660 mm) stroke |
| Valve gear |
Stephenson |
| Valve type |
Slide valves |
|
|
|
| Career |
| Operators |
|
| Class |
|
| Numbers |
- GCR: 1013-1042, 104–113
- LNER: 6013–6042, 5104-5113
|
| Nicknames |
"Pom-Pom Bogies" |
| Withdrawn |
1913–1927 |
| Disposition |
Rebuilt to GCR class 11D |
|
| Type and origin |
| Power type |
Steam |
| Designer |
John G. Robinson |
| Builder |
|
| Build date |
1901-02 (30), 1904 (10) |
| Total produced |
40 |
| Specifications |
Configuration:
|
|
| • Whyte
|
4-4-0 |
| • UIC
|
2'Bn2, later 2'Bh2 |
| Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
| Leading dia. |
3 ft 6 in (1.067 m) |
|
Driver dia. |
6 ft 9 in (2.057 m) |
| Length |
56 ft 5.5 in (17.209 m) |
| Loco weight |
55.7 long tons (56.6 t) |
Firebox:
• Firegrate area |
21.17 sq ft (1.967 m2) |
Boiler:
|
|
| • Diameter |
4 ft 9.5 in (1,460 mm) to 5 ft (1,500 mm) |
| Boiler pressure |
180 psi (1.24 MPa) |
| Heating surface |
1,260 sq ft (117 m2) |
Superheater:
|
|
| • Heating area |
22 elements, 178 sq ft (16.5 m2) |
| Cylinders |
Two, inside |
| Cylinder size |
18.5 in (470 mm) bore
26 in (660 mm) stroke |
| Valve gear |
Stephenson |
| Valve type |
Slide valves |
| Career |
| Operators |
|
| Class |
|
| Numbers |
- GCR: 1013-1042, 104–113
- LNER: 6013–6042, 5104-5113
|
| Nicknames |
"Pom-Pom Bogies" |
| Withdrawn |
1913–1927 |
| Disposition |
Rebuilt to GCR class 11D |
Although overshadowed by the later and more famous steam locomotives that John G. Robinson would go on to design, the Great Central Railway Class 11B 4-4-0 Express Passenger engines were a successful class which totalled 40. Built from 1901–1903, in later rebuilt form as 11D, some 11Bs would last in service until 1950. Railwaymen continued to refer to the class as "11B" even after all were rebuilt to 11D. Being contemporary with and to some extent the 4-4-0 version of Robinson's much more numerous 0-6-0 goods class 9J, which were known as "Pom-Poms", the 11Bs acquired the nickname "Pom-Pom Bogies". The London & North Eastern Railway classified the 11Bs, along with their 11C and 11D rebuilds, as Class D9.
When John G. Robinson took up the reigns at Gorton there was a serious and immediate shortage of suitable locomotives. Part of the requirement was for express passenger engines for the newly completed London Extension. Pollitt's locomotives of class 11 were performing satisfactorily but the piston-valved 11A 4-4-0s, intended for use on Marylebone expresses had been problematic. There were also some previously ordered 4-2-2 'singles' being delivered, but Robinson decided that more powerful locomotives were required.
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