GWR 645 Class

Specifications
Specifications
Configuration:;
• Whyte	0-6-0ST
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	4 ft 6 in (1.372 m); see text for variations
Fuel type	Coal
Cylinders	two
Cylinder size	16 in × 24 in (406 mm × 610 mm); see text for variations

Type and origin
Type and origin
Power type	Steam
Designer	George Armstrong
Builder	GWR Wolverhampton Works
Build date	1872-1881
Total produced	108

GWR 645 Class
GWR 645 Class
	No. 1532 at Croes Newydd Depot, 1947. This was built as a standard saddle-tank in 1879, and acquired its panniers in 1921
Power type
Type and origin
Power type	Steam
Designer	George Armstrong
Builder	GWR Wolverhampton Works
Build date	1872-1881
Total produced	108
Configuration:;
Specifications
Configuration:;
• Whyte	0-6-0ST
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	4 ft 6 in (1.372 m); see text for variations
Fuel type	Coal
Cylinders	two
Cylinder size	16 in × 24 in (406 mm × 610 mm); see text for variations
Operators
Career
Operators	South Wales Mineral Railway; Carmarthen and Cardigan Railway; Great Western Railway; British Railways
Retired	1928-1949
Disposition	All scrapped

The GWR 645 Class was a class of 0-6-0ST designed by George Armstrong and built at the Wolverhampton railway works of the Great Western Railway (GWR). Thirty-six were constructed between 1872-3, of which three were built for the South Wales Mineral Railway (SWMR), two for the Carmarthen and Cardigan Railway (C&CR) and the remainder for the GWR. In essence, they were saddle tank versions of his GWR 633 Class of 1871. From 1878, a further 72 of the class, partially enlarged, were added in the 1501 numbering sequence. Unlike the originals, the "1501"s had full-length saddle tanks from the start.

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