This article is about the 5 locomotives rebuilt in 1938/9 from the 3150 Class. For the 40 locomotives built in 1903–06 as the 3100 class, see
GWR 5100 Class .
GWR 3100 Class Type and origin Power type Steam Designer Churchward Builder GWR Swindon Works Order number Lot 319 Build date 1906 Rebuild date 1938 Number rebuilt 5
Specifications Configuration: • Whyte 2-6-2T • UIC 1'C1 h2t Gauge 4 ft 8+ 1 ⁄2 in (1,435 mm ) standard gauge Leading dia. 3 ft 0 in (0.914 m) Driver dia.5 ft 3 in (1.600 m) Trailing dia. 3 ft 8 in (1.118 m) Minimum curve 6 chains (396 ft; 121 m) normal, Length 41 ft 0 in (12.50 m) over buffers Width 11+ 1 ⁄4 in (2.724 m)Height 13 ft 2 in (4.013 m) Axle load 19 long tons 3 cwt (42,900 lb or 19.5 t) Adhesive weight 57 long tons 6 cwt (128,400 lb or 58.2 t) Loco weight 81 long tons 9 cwt (182,400 lb or 82.8 t) Fuel type Coal Water cap. 2,000 imp gal (9,100 L; 2,400 US gal) Firebox: • Grate area 20.56 sq ft (1.910 m2 ) Boiler GWR Standard No. 4 Boiler pressure 225 lbf/in2 (1.55 MPa) Heating surface: • Firebox 128.72 sq ft (11.958 m2 ) • Tubes 1,349 sq ft (125.3 m2 ) Superheater: • Type 4-element or 6-element • Heating area 4-element: 136.64 sq ft (12.694 m2 ),2 ) Cylinders Two, outside Cylinder size 18.5 in × 30 in (470 mm × 762 mm)
Career Operators GWR » BR Class 3100 Power class GWR: D, Numbers 3100–3104 Axle load class GWR: Red Withdrawn 1957–1960 Disposition All scrapped
The Great Western Railway (GWR) 3100 Class was a class of 2-6-2 T side tank steam locomotive .
