GWR 3252 Class

GWR 3252 Duke class
3258 King Arthur c. 1910
Type and origin Power type Steam Designer William Dean Builder GWR Swindon Works Order number Lots 97, 101, 102, 105, 113 Serial number 1431–1432, 1493–1510, 1531–1550, 1682–1701 Build date 1895–1899 Total produced 60
Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B ht Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 8 in (1.118 m) Driver dia. 5 ft 8 in (1.727 m) Axle load 15 long tons 7 cwt (34,400 lb or 15.6 t) (15.6 t; 17.2 short tons) full Loco weight 46 long tons 0 cwt (103,000 lb or 46.7 t) (46.7 t; 51.5 short tons) full Tender weight 24 long tons 0 cwt (53,800 lb or 24.4 t) (24.4 t; 26.9 short tons) full Total weight 70 long tons 0 cwt (156,800 lb or 71.1 t) (71.1 t; 78.4 short tons) full Fuel type Coal Boiler GWR Duke[1] Boiler pressure 160 lbf/in2 (1.1 MPa) 180 lbf/in2 (1.2 MPa) after refit Heating surface: ​  • Firebox 115.27 sq ft (10.709 m2)  • Tubes 1,285.58 sq ft (119.434 m2) Cylinders Two, inside Cylinder size 18 in × 26 in (457 mm × 660 mm) Valve gear Stephenson Train brakes Vacuum
Career Operators GWR » BR Withdrawn 1929–1951 Disposition 20 rebuilt to Bulldogs, 30 rebuilt to Dukedogs, remainder scrapped

The Great Western Railway 3252 or Duke Class were 4-4-0 steam locomotives with outside frames and parallel domed boilers.^[2] They were built in five batches between 1895 and 1899 for express passenger train work in Devon and Cornwall. William Dean was their designer, possibly with the collaboration of his assistant, George Jackson Churchward.^[2] Four prototype 4-4-0s, of the Armstrong Class, had already been built in 1894.^[3]