South Australian Railways R class

Specifications
Specifications
Configuration:;
• Whyte	4-6-0 (2′C 3) (2′C 2′2′)
Gauge	1,600 mm (5 ft 3 in)
Leading dia.	2 ft 11 in (889 mm)
Driver dia.	4 ft 6 in (1,372 mm)
Length	49 ft 11 in (15.215 m)
Height	13 ft 4 in (4,064 mm)
Axle load	9 long tons 17 cwt (22,100 lb or 10 t) (R); 11 long tons 8 cwt (25,500 lb or 11.6 t) (Rx)
Adhesive weight	28.50 long tons 0 cwt (63,800 lb or 29 t)
Loco weight	40 long tons (45 short tons; 41 t) (R)
Tender weight	22 long tons (25 short tons; 22 t) (R)
Total weight	65 long tons (73 short tons; 66 t) (R), 88 long tons (99 short tons; 89 t)
Fuel type	Coal
Fuel capacity	4 long tons 18 cwt (11,000 lb or 5 t) (R), 7 long tons 16 cwt (17,500 lb or 7.9 t) (Rx),; 6 long tons 17 cwt (15,300 lb or 7 t); (Rx 6 wheel tender)
Water cap.	2,040 imp gal; (2,450 US gal; 9,300 L) (R); 3,750 imp gal; (4,500 US gal; 17,000 L) (Rx),; 3,200 imp gal; (3,800 US gal; 15,000 L) (Rx 6 wheel tender)
Firebox:
• Grate area	17.6 sq ft (1.64 m2) (R); 20.37 sq ft (1.892 m2) (Rx)
Boiler pressure	145 psi (1,000 kPa) (R); 175 psi (1,207 kPa) (Rx)
Heating surface:
• Firebox	98.3 sq ft (9.13 m2). (R); 105 sq ft (9.8 m2) (Rx)
• Tubes	1,196 sq ft (111.1 m2) (R); 1,208 sq ft (112.2 m2) (Rx)
Superheater:;
• Heating area	178 sq ft (16.5 m2) (Rx); (not fitted to some locos)
Cylinders	2
Cylinder size	18 in × 24 in; (457 mm × 610 mm)
Valve gear	Allan Straight Link
Valve type	Piston

Type and origin
Type and origin
Power type	Steam
Builder	Dübs & Co (6); James Martin & Co (24); Islington Railway Workshops (14); North British Locomotive Company (15); Walkers Limited (25)
Build date	1885-1916
Total produced	84
Rebuilder	Islington Railway Workshops
Rebuild date	1899-1913 as Rx
Number rebuilt	30 to Rx

South Australian Railways R & Rx class
South Australian Railways R & Rx class
	Rx149 with a load of wine casks at McLaren Vale
Power type
Type and origin
Power type	Steam
Builder	Dübs & Co (6); James Martin & Co (24); Islington Railway Workshops (14); North British Locomotive Company (15); Walkers Limited (25)
Build date	1885-1916
Total produced	84
Rebuilder	Islington Railway Workshops
Rebuild date	1899-1913 as Rx
Number rebuilt	30 to Rx
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0 (2′C 3) (2′C 2′2′)
Gauge	1,600 mm (5 ft 3 in)
Leading dia.	2 ft 11 in (889 mm)
Driver dia.	4 ft 6 in (1,372 mm)
Length	49 ft 11 in (15.215 m)
Height	13 ft 4 in (4,064 mm)
Axle load	9 long tons 17 cwt (22,100 lb or 10 t) (R); 11 long tons 8 cwt (25,500 lb or 11.6 t) (Rx)
Adhesive weight	28.50 long tons 0 cwt (63,800 lb or 29 t)
Loco weight	40 long tons (45 short tons; 41 t) (R)
Tender weight	22 long tons (25 short tons; 22 t) (R)
Total weight	65 long tons (73 short tons; 66 t) (R), 88 long tons (99 short tons; 89 t)
Fuel type	Coal
Fuel capacity	4 long tons 18 cwt (11,000 lb or 5 t) (R), 7 long tons 16 cwt (17,500 lb or 7.9 t) (Rx),; 6 long tons 17 cwt (15,300 lb or 7 t); (Rx 6 wheel tender)
Water cap.	2,040 imp gal; (2,450 US gal; 9,300 L) (R); 3,750 imp gal; (4,500 US gal; 17,000 L) (Rx),; 3,200 imp gal; (3,800 US gal; 15,000 L) (Rx 6 wheel tender)
Firebox:
• Grate area	17.6 sq ft (1.64 m2) (R); 20.37 sq ft (1.892 m2) (Rx)
Boiler pressure	145 psi (1,000 kPa) (R); 175 psi (1,207 kPa) (Rx)
Heating surface:
• Firebox	98.3 sq ft (9.13 m2). (R); 105 sq ft (9.8 m2) (Rx)
• Tubes	1,196 sq ft (111.1 m2) (R); 1,208 sq ft (112.2 m2) (Rx)
Superheater:;
• Heating area	178 sq ft (16.5 m2) (Rx); (not fitted to some locos)
Cylinders	2
Cylinder size	18 in × 24 in; (457 mm × 610 mm)
Valve gear	Allan Straight Link
Valve type	Piston
Tractive effort
Performance figures
Tractive effort	17,700 lbf (78.73 kN) (R); 21,420 lbf (95.28 kN) (Rx);
Factor of adh.	3.49
Operators
Career
Operators	South Australian Railways
Class	R/Rx
Number in class	84
Numbers	5, 9, 10, 15, 20, 25, 48, 55, 56, 91-96, 102-107, 138-153, 155, 158, 160, 190-203, 206-235 (* originally built as R class)
First run	10.2.1886
Last run	5.9.1969
Withdrawn	1927-1969
Preserved	Rx 5, Rx 55, Rx 93, Rx, 160, Rx 191, Rx 201, Rx 207, Rx 217, Rx 224 & Rx 231
Scrapped	1928-1974
Disposition	Ten preserved, remainder scrapped

The South Australian Railways R class engine, later upgraded to Rx class engine is a class of 4-6-0 steam engines operated by the South Australian Railways.