GSWR 333/GSR 338/342 Class
Type and origin Power type Steam Designer Coey (333) A. W. Harty (342) Builder Inchicore Build date 1907—1908 (333) 1936 (342) Total produced 13 (333 & 342)
Specifications Configuration: ​  • Whyte 4-4-0 Gauge 5 ft 3 in (1,600 mm) Leading dia. 3 ft 0 in (910 mm) Driver dia. 5 ft 8+1⁄2 in (1,740 mm) Length 30 ft 1+3⁄4 in (9,188 mm) Adhesive weight 32 long tons (33 t) Loco weight 51.5 long tons (52.3 t) Water cap. 3,450 imp gal (15,700 L; 4,140 US gal) Boiler pressure 180 lbf/in2 (1.24 MPa) Cylinders 2 Cylinder size 18 in × 26 in (457 mm × 660 mm)
Performance figures Tractive effort 18,820 lbf (83.72 kN)
Career Operators Great Southern and Western Railway (GSWR) Great Southern Railways (GSR) CIÉ Class D4 (Inchicore) Power class L Number in class 8 (333) 5 (342) Numbers 333—340,342—346 Locale Ireland Withdrawn 1955—1960 Disposition All scrapped
Class 342 as built except where noted [1]: 113–115, 269–270

The Great Southern and Western Railway (GS&WR) Class 333 consistent of eight 4-4-0 mixed-traffic locomotives designed by Robert Coey and built by Inchicore railway works in 1907/8. In 1936, the successor company - the Great Southern Railways (GSR) - built five similar engines known as GSR Class 342.^{[1]: 113–115, 269–270}

Design and modifications

The design used the same taper boiler and 18 in x 20 in cylinders as Coey's express 4-4-0 express passenger engine 321; however, the smaller driving wheels and less than 16 long ton maximum axle load were suitable for go anywhere and secondary passenger and mixed duties.^[2]

The later Class 342 locomotives were essentially modeled on the 1927 rebuild of locomotive No. 338 of the 333 Class.^{[1]: 113–115, 269–270}

Service

In practice, all members of these classed were treated interchangeably for operational purposes. A 16 long tons (16 t) maximum axle load allowed the class to be used almost anywhere. They were assessed in 1948 as quite powerful and fast and especially useful for passenger specials.^{[1]: 113–115, 269–270}

References