GWR 6959 Class

Great Western Railway 6959 Class
6960 Raveningham Hall (now preserved) with a Didcot slow train, April 1957.
Type and origin Power type Steam Designer Frederick Hawksworth Builder GWR/BR Swindon Works Order number Lots 350, 366, 368, 376 Build date 1944–1950 Total produced 71
Specifications Configuration: ​  • Whyte 4-6-0  • UIC 2′C h2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 0 in (0.914 m) Driver dia. 6 ft 0 in (1.829 m) Minimum curve 8 chains (530 ft; 160 m) normal, 7 chains (460 ft; 140 m) slow Length 63 ft 0+1⁄4 in (19.21 m) over buffers Width 8 ft 11+1⁄2 in (2.731 m) Height 13 ft 2+1⁄16 in (4.015 m) Axle load 19 long tons 5 cwt (43,100 lb or 19.6 t) (21.6 short tons) Adhesive weight 57 long tons 10 cwt (128,800 lb or 58.4 t) (64.4 short tons) Loco weight 75 long tons 16 cwt (169,800 lb or 77 t) (84.9 short tons) full Tender weight 47 long tons 6 cwt (106,000 lb or 48.1 t) (53.0 short tons) full Fuel type Coal Fuel capacity 6 long tons 0 cwt (13,400 lb or 6.1 t) (5.6 short tons) Water cap. 4,000 imp gal (18,000 L; 4,800 US gal) Firebox: ​  • Grate area 27.07 sq ft (2.515 m2) Boiler GWR Standard No. 1 Boiler pressure 225 psi (1.55 MPa) Heating surface: ​  • Firebox 154.90 sq ft (14.391 m2)  • Tubes and flues 1,582.60 sq ft (147.028 m2) Superheater: ​  • Heating area 295 sq ft (27.4 m2) Cylinders Two, outside Cylinder size 18.5 in × 30 in (470 mm × 762 mm) Valve gear Stephenson, inside Valve type Piston valves
Performance figures Tractive effort 27,275 lbf (121.33 kN)
Career Operators Great Western Railway → British Railways Power class GWR: D, BR: 5MT Numbers 6959–6999, 7900-7929 Axle load class GWR: Red Withdrawn January 1963 – December 1965 Disposition Six preserved, one donor, remainder scrapped

The Great Western Railway (GWR) 6959 or Modified Hall Class is a class of 4-6-0 steam locomotive. They were a development by Frederick Hawksworth of Charles Collett's earlier Hall Class named after English and Welsh country houses.