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Specifications
Specifications
Configuration:;
• Whyte	0-4-4BT
Gauge	5 ft 3 in (1,600 mm)
Driver dia.	5 ft 8+1⁄2 in (1,740 mm)
Trailing dia.	3 ft 9 in (1,140 mm)
Length	33 ft 6+1⁄2 in (10,224 mm)
Loco weight	41.8 long tons (42.5 t)
Water cap.	1,044 imp gal (4,750 L; 1,254 US gal) back; 135 imp gal (610 L; 162 US gal) side;
Boiler pressure	150 lbf/in2 (1.03 MPa)
Cylinders	2
Cylinder size	16 in × 20 in (406 mm × 508 mm)

Type and origin
Type and origin
Power type	Steam
Designer	Alexander McDonnell
Builder	Inchicore
Build date	1879—1887
Total produced	23

GSWR Classes 28 & 47
GSWR Classes 28 & 47
	No. 74 at Rock of Cashel 1905
Power type
Type and origin
Power type	Steam
Designer	Alexander McDonnell
Builder	Inchicore
Build date	1879—1887
Total produced	23
Configuration:;
Specifications
Configuration:;
• Whyte	0-4-4BT
Gauge	5 ft 3 in (1,600 mm)
Driver dia.	5 ft 8+1⁄2 in (1,740 mm)
Trailing dia.	3 ft 9 in (1,140 mm)
Length	33 ft 6+1⁄2 in (10,224 mm)
Loco weight	41.8 long tons (42.5 t)
Water cap.	1,044 imp gal (4,750 L; 1,254 US gal) back; 135 imp gal (610 L; 162 US gal) side;
Boiler pressure	150 lbf/in2 (1.03 MPa)
Cylinders	2
Cylinder size	16 in × 20 in (406 mm × 508 mm)
Tractive effort
Performance figures
Tractive effort	9,530 lbf (42.39 kN)
Operators
Career
Operators	GS&WR; GSR;
Class	E3 (Inchicore)
Power class	S/ RT
Number in class	20 (47); 4 (28);
Numbers	28,40,47–51,70–83
Locale	Ireland
Withdrawn	1905—1945
Disposition	All scrapped
	Details refer to class 47; ;

The Great Southern and Western Railway (GS&WR) Class 47 consisted of twenty 0-4-4 BT locomotives designed by Alexander McDonnell and introduced from 1883. They were intended for branch lines around Cork and for Dublin—Kildare and Dublin-Kilkenny services.^[1]^: 65, 66

Class 47 was preceded by four members of class 28 introduced from about 1879, these having a slightly longer wheelbase. Only one of class 28 remaining into GSR service when it was renumbered 40 and included in GSR Class 47. This was the 100th locomotive built under the Alexander McDonnell period and was temporarily numbered 100 when new.^[1]^: 65–66