GNRI Class U

Great Northern Railway (Ireland) class U

204 Antrim on a passenger train leaving Omagh, 7 June 1957

Type and origin Power type Steam Designer George T. Glover Builder Beyer, Peacock & Co. Build date 1915 (5), 1947 (5) Total produced 10

Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B h2 Gauge 5 ft 3 in (1,600 mm) Driver dia. 5 ft 9 in (1.753 m) Boiler pressure 175 psi (1.21 MPa) Cylinders Two, inside Cylinder size 18 in × 24 in (457 mm × 610 mm)

Performance figures Tractive effort 16,763 lbf (74.6 kN)

Career Operators GNR(I) Numbers 196–205 Withdrawn 1959–1965

The GNR(I) class U was a class of 4-4-0 steam locomotives built for the Great Northern Railway (Ireland)

Five were built by Beyer, Peacock and Company in 1915, with an addition five built in 1947, making them the last inside-cylinder 4-4-0 locomotive be manufactured anywhere in the world

The earlier locomotives were initially unnamed. However, after the later locomotives were delivered with names of counties along the GNR(I) route, the earlier locomotives received names of Loughs.

All were still in service in 1958 when the GNR(I) was divided between the Ulster Transport Authority (UTA) and Córas Iompair Éireann (CIÉ), with each receiving five locomotives.