Steam locomotive in Great Britain
The Great Bear 111 The Great Bear in 1908
Type and origin Power type Steam Designer George Jackson Churchward Builder GWR, Swindon Works Order number Lot 171 Serial number 2279 Build date February 1908 Total produced 1 Rebuilder GWR, Swindon Rebuild date 7 January 1924 Number rebuilt 1
Specifications Configuration: • Whyte 4-6-2 • UIC 2'C1'h4 Gauge 4 ft 8+ 1 ⁄2 in (1,435 mm ) standard gauge Leading dia. 3 ft 2 in (0.965 m) Driver dia.6 ft 8.5 in (2.045 m) Trailing dia. 3 ft 8 in (1.118 m) Wheelbase 34 ft 6 in (10.52 m) Length 71 ft 2.025 in (21.69 m) Axle load 20 long tons (20 t ; 22 short tons ) Adhesive weight 60 long tons (61 t; 67 short tons) Loco weight 97 long tons (99 t; 109 short tons) Tender weight 45.75 long tons (46.48 t; 51.24 short tons) Total weight 142.75 long tons (145.04 t; 159.88 short tons) Tender type 8 wheel bogie Fuel type Coal Fuel capacity 6 long tons (6.1 t; 6.7 short tons) Water cap. 3,500 US gal (13,000 L; 2,900 imp gal) Firebox: • Grate area 41.79 sq ft (3.882 m2 ) Boiler GWR Standard No. 6[ 1] Boiler pressure 225 psi (1.551 MPa) Heating surface: • Firebox 158.154 sq ft (14.6930 m2 ) • Tubes and flues 2,697.67 sq ft (250.622 m2 ) • Total surface 3,400.81 sq ft (315.946 m2 ) Superheater: • Type Swindon No. 1, Field-tube, 3-row • Heating area 545 sq ft (50.6 m2 ) Cylinders 4 Cylinder size 15 in × 26 in (381 mm × 660 mm)
Performance figures Tractive effort 27,800 lbf (124 kN) (at 85% boiler pressure)
Career Operators GWR Class 111 Power class Special Number in class 1 Numbers 111 Official name The Great Bear , renamed Viscount Churchill in 1924Axle load class Red Locale Great Western Main Line (Paddington - Bristol )First run 4 February 1908 Retired (rebuilt 1924) July 1953 Disposition Front end reused to build another GWR 4073 Class , rest of the locomotive was scrapped
The Great Bear Great Western Railway . It was the first 4-6-2 (Pacific) locomotive used on a railway in Great Britain,[ 2]
