GWR 3700 Class

Specifications
Specifications
Configuration:;
• Whyte	4-4-0
• UIC	2′B n2, later 2′B h2
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)
Wheelbase	8 ft 1⁄2 in (2.451 m)
Loco weight	55 long tons 6 cwt (123,900 lb or 56.2 t)
Total weight	92 long tons 1 cwt (206,200 lb or 93.5 t)
Fuel type	Coal
Fuel capacity	5 tons
Water cap.	3,600 imp gal (16,000 L; 4,300 US gal)
Boiler	GWR Standard No. 4
Cylinders	Two, inside
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Stephenson valve gear
Valve type	Slide valves
Loco brake	Steam
Train brakes	Vacuum

Type and origin
Type and origin
Power type	Steam
Designer	George Jackson Churchward
Builder	GWR Swindon Works
Order number	Lot 141
Serial number	1993–2002
Build date	1903
Total produced	10 new + 10 rebuilt from Atbara class
Rebuilder	Swindon Works
Rebuild date	1902–1909

3700 "City" class
3700 "City" class
	3433 City of Bath in 1909
Power type
Type and origin
Power type	Steam
Designer	George Jackson Churchward
Builder	GWR Swindon Works
Order number	Lot 141
Serial number	1993–2002
Build date	1903
Total produced	10 new + 10 rebuilt from Atbara class
Rebuilder	Swindon Works
Rebuild date	1902–1909
Configuration:;
Specifications
Configuration:;
• Whyte	4-4-0
• UIC	2′B n2, later 2′B h2
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)
Wheelbase	8 ft 1⁄2 in (2.451 m)
Loco weight	55 long tons 6 cwt (123,900 lb or 56.2 t)
Total weight	92 long tons 1 cwt (206,200 lb or 93.5 t)
Fuel type	Coal
Fuel capacity	5 tons
Water cap.	3,600 imp gal (16,000 L; 4,300 US gal)
Boiler	GWR Standard No. 4
Cylinders	Two, inside
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Stephenson valve gear
Valve type	Slide valves
Loco brake	Steam
Train brakes	Vacuum
Maximum speed
Performance figures
Maximum speed	100 mph (160 km/h)
Tractive effort	17,800 lbf (79.2 kN)
Factor of adh.	8.50
Operators
Career
Operators	GWR
Class	3700
Power class	GWR: A
Number in class	20
Numbers	(until 1912) 3400–3409, 3433–3442; (from 1912) 3700–3719;
Official name	City Class
Axle load class	GWR: Blue
Withdrawn	October 1927 - May 1931
Disposition	One preserved, remainder scrapped

The Great Western Railway 3700 Class, or City Class, was a series of twenty 4-4-0 steam locomotives, designed for hauling express passenger trains.