GWR 4073 Class 5080 Defiant

Specifications
Specifications
Configuration:;
• Whyte	4-6-0
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Leading dia.	3 ft 2 in (0.965 m)
Driver dia.	6 ft 8+1⁄2 in (2.045 m)
Length	65 ft 2 in (19.86 m) over buffers
Width	8 ft 11 in (2.718 m)
Height	13 ft 1 in (3.988 m) (Cut back from 13 ft 4+1⁄2 in (4.077 m))
Loco weight	79 long tons 17 cwt (178,900 lb or 81.1 t); 89.4 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); 6 long tons 0 hundredweight (6.10 t; 6.72 short tons)
Water cap.	4,000 imp gal (18,000 L; 4,800 US gal)
Firebox:
• Grate area	29.36 sq ft (2.728 m2)
Boiler	GWR Standard Number 8
Boiler pressure	225 lbf/in2 (1.55 MPa)
Heating surface:
• Firebox	162.7 sq ft (15.12 m2) (Collett); 163.5 sq ft (15.19 m2) (Hawksworth)
• Tubes	1,857.7 sq ft (172.59 m2) (Collett); 1,799.5 sq ft (167.18 m2) (Hawksworth)
Cylinders	Four (two inside, two outside)
Cylinder size	16 in × 26 in (406 mm × 660 mm)
Valve gear	Inside cylinders: Walschaerts; Outside cylinders: derived from inside cylinders via rocking bars.
Valve type	Piston valves
Loco brake	Vacuum

Type and origin
Type and origin
Power type	Steam
Designer	Charles Collett
Builder	GWR Swindon Works
Build date	May 1939

GWR 5080 *Defiant*
GWR 5080 Defiant
	Defiant is sat waiting for 5043 to be moved off its turntable road prior to being taken back to the shed
Power type
Type and origin
Power type	Steam
Designer	Charles Collett
Builder	GWR Swindon Works
Build date	May 1939
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Leading dia.	3 ft 2 in (0.965 m)
Driver dia.	6 ft 8+1⁄2 in (2.045 m)
Length	65 ft 2 in (19.86 m) over buffers
Width	8 ft 11 in (2.718 m)
Height	13 ft 1 in (3.988 m) (Cut back from 13 ft 4+1⁄2 in (4.077 m))
Loco weight	79 long tons 17 cwt (178,900 lb or 81.1 t); 89.4 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); 6 long tons 0 hundredweight (6.10 t; 6.72 short tons)
Water cap.	4,000 imp gal (18,000 L; 4,800 US gal)
Firebox:
• Grate area	29.36 sq ft (2.728 m2)
Boiler	GWR Standard Number 8
Boiler pressure	225 lbf/in2 (1.55 MPa)
Heating surface:
• Firebox	162.7 sq ft (15.12 m2) (Collett); 163.5 sq ft (15.19 m2) (Hawksworth)
• Tubes	1,857.7 sq ft (172.59 m2) (Collett); 1,799.5 sq ft (167.18 m2) (Hawksworth)
Cylinders	Four (two inside, two outside)
Cylinder size	16 in × 26 in (406 mm × 660 mm)
Valve gear	Inside cylinders: Walschaerts; Outside cylinders: derived from inside cylinders via rocking bars.
Valve type	Piston valves
Loco brake	Vacuum
Maximum speed
Performance figures
Maximum speed	25mph - (heritage railways) 45mph - (mainline, tender first) 75mph - (mainline, chimney first)
Tractive effort	31,625 lbf (140.68 kN)
Operators
Career
Operators	Great Western Railway; British Railways
Power class	GWR: D; BR: 7P
Axle load class	GWR: Red
Withdrawn	April 1963
Current owner	Tyseley Locomotive Works
Disposition	Stored

GWR 4073 Class 5080 Defiant is a GWR 4073 Class steam locomotive built for the Great Western Railway at Swindon Works in May 1939. It was originally named Ogmore Castle.

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