GWR 3511 class

Nos 3511 to 3520

Type and origin Power type Steam Designer William Dean Builder GWR Swindon Order number 64 (part) Build date 1885 Total produced 10

Specifications Configuration 2-4-0T UIC class 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.

History

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.

Use

Originally built with condensing apparatus they were used on work through the Severn Tunnel until the ventilation was improved.^[1]

Rebuilding

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.

References

1. Holcroft, H (1957). An Outline of Great Western Locomotive Practice 1837-1947. Shepperton, Surrey, UK: Ian Allan Ltd. p. 59. ISBN 0-7110-0228-2.

• The Locomotives of the Great Western Railway, Part 6: Four Coupled Tank Engines. The Railway Correspondence and Travel Society 1959. ISBN 0-901115-36-3.