GWR 111 The Great Bear

Specifications
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
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)

Type and origin
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

*The Great Bear*
The Great Bear
	Official picture of the GWR 4-6-2 No. 111 The Great Bear in 1908
Power type
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
Configuration:;
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
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)
Tractive effort
Performance figures
Tractive effort	27,800 lbf (124 kN) (at 85% boiler pressure)
Operators
Career
Operators	GWR
Class	111
Power class	Special
Number in class	1
Numbers	111
Official name	The Great Bear, renamed Viscount Churchill in 1924
Axle 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, number 111, was a locomotive of the Great Western Railway. It was the first 4-6-2 (Pacific) locomotive used on a railway in Great Britain, and the only one of its type built by the GWR.

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