| GCR Class 9J LNER Class J11 | |
| Powertype: | Steam |
| Designer: | John G. Robinson |
| Builddate: | 1901–1910 |
| Totalproduction: | 174 |
| Whytetype: | 0-6-0 |
| Uicclass: | C n2t |
| Driverdiameter: | 5feet |
| Length: | 53feet |
| Height: | 13feet |
| Fueltype: | Coal |
| Watercap: | 4000impgal |
| Boilerpressure: | 1802NaN2 |
| Firearea: | 19square feet |
| Fireboxarea: | 130square feet |
| Superheaterarea: | 139square feet |
| Cylindercount: | Two, inside |
| Cylindersize: | 18.5x |
| Valvegear: | Stephenson |
| Tractiveeffort: | 219602NaN2 |
| Powerclass: | BR: 3F |
| Numinclass: | 174 |
| Nicknames: | Pom-Poms |
| Axleloadclass: | LNER/BR: Route Availability: 5 |
| Withdrawndate: | 1954–1962 |
| Disposition: | All scrapped |
The GCR Class 9J (LNER Class J11) was a class of 174 0-6-0 steam locomotives designed by John G. Robinson for freight work on the Great Central Railway (GCR) in 1901. They were a part of the Railway Operating Division during World War 1.[1] The class acquired the nickname "Pom-Poms" due to the similarity of their exhaust noise to that of the "Pom-Pom" quick-firing gun used in the South African War.[2]
They passed to the London and North Eastern Railway (LNER) in 1923. The LNER classified them as J11 with sub-classes J11/1 to J11/5 because of detail differences.[3]
The whole class survived into British Railways (BR) ownership in 1948 and their BR numbers were 64280–64453.[4] [5] All had been withdrawn and scrapped by 1962 and none have been preserved.