GWR 3511 class
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| Type and origin | |
|---|---|
| Power type | Steam |
| Designer | William Dean |
| Builder | GWR Swindon |
| Order number | 64 (part) |
| Build date | 1885 |
| Total produced | 10 |
| Specifications | |
|---|---|
| Configuration: |
|
| • Whyte | 2-4-0T |
| • UIC | 1B |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Leading dia. | 3' 7" |
| Driver dia. | 5' 1" |
| Wheelbase | 17 ft 0 in |
| Fuel type | Coal |
| Heating surface | 1209.86 sq. ft |
| • Tubes | 1106.57 sq. ft |
| • Firebox | 103.29 sq. ft |
| Superheater | None |
| Cylinders | Two, inside |
| Cylinder size | 17 in x 26 in |
| Valve gear | Stephenson |
| Train heating | Steam |
| Career | |
|---|---|
| Operators | GWR |
The GWR 3511 class were standard gauge 2-4-0 side tank locomotives designed by William Dean for the Great Western Railway and built in 1885.
They comprised the last ten of the twenty locomotives of Lot 64. The first ten locomotives of this Lot were built to the broad gauge as the 3501 class.
Originally built with condensing apparatus they were used on work through the Severn Tunnel until the ventilation was improved.
The condensing apparatus was soon removed and in 1894/5 they were all rebuilt as 2-4-0 tender locomotives of the 3201 class as were the 3501 class.
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