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GWR 3600 Class

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Title: GWR 3600 Class  
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GWR 3600 Class

GWR 3600 class
Type and origin
Power type Steam
Designer William Dean
Builder Swindon Works
Order number Lots 130, 134, 143
Build date 1900–1903
Total produced 31
Configuration 2-4-2T
UIC classification 1′B1′
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Leading wheel
3 ft 8 in (1.118 m)
Driver diameter 5 ft 2 in (1.575 m)
Trailing wheel
3 ft 8 in (1.118 m)
Fuel type Coal
Fuel capacity 3 long tons (3.0 t; 3.4 short tons)
Water capacity 1,900 imp gal (8,600 l; 2,300 US gal)
Boiler pressure 200 lbf/in2 (1.38 MPa)
Cylinders Two, inside
Cylinder size 17 in × 24 in (432 mm × 610 mm)
Performance figures
Tractive effort 19,020 lbf (84.61 kN)
Operator(s) Great Western Railway
Withdrawn October 1930 – November 1934
Disposition All scrapped

The Great Western Railway (GWR) 3600 Class was a class of 2-4-2T side tank steam locomotive, designed by William Dean and built at Swindon in three lots in 1900-1903:


  • 11 (renumbered 3600) (Lot 130, 1900)
  • 3601–3620 (Lot 134, 1902)
  • 3621–3630 (Lot 143, 1903)


Dean had built an experimental 2-4-2T numbered 11, whose success led to the cancellation of another batch of 2-4-0 Churchward, were slightly larger again, and had taper boilers. The class gained the nickname "Birdcage" due to their (for the GWR) unusually spacious cabs.


The 3600 class were fitted with steam reversing gear, steam brakes, and two steam-operated water pick-ups for forward and reverse working. This reflects their intended work as fast suburban engines. About half were employed on such duties in the Birmingham area. The rest worked in the London area, though later a few worked Chester-Birkenhead trains, and some were allocated to South Wales sheds. They were essentially passenger train locomotives, and were eventually superseded by Collett's 2-6-2Ts.

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