CIE 113 Class

Córas Iompair Éireann B class
(later 113 class)

B Class locomotive No.113
Type and origin
Power type Diesel-electric
Builder Córas Iompair Éireann, Inchicore works
Build date 1950–1951
Total produced 2
AAR wheel arr. B-B
UIC class Bo′Bo′
Gauge 1,600 mm (5 ft 3 in)
Wheel diameter 44 in (1,118 mm)
Length 14.53 m (47 ft 8 in)
Loco weight 81 t (80 long tons; 89 short tons)
Fuel capacity 1,910 litres (420 imp gal; 500 US gal)
Prime mover Sulzer 6LDA28
Engine type Four-stroke diesel
Generator DC
Traction motors DC Metrovick MV137, 4 off
Transmission Diesel electric
Loco brake Westinghouse air brake
Train brakes Vacuum
Performance figures
Maximum speed 88 km/h (55 mph)
Power output 915 hp (682 kW) at 750rpm (one hour)
815 hp (608 kW) at 700 rpm (continuous)
Uprated in 1956 to 960 hp (720 kW)
Tractive effort 205 kN (46,000 lbf) (starting)
102 kN (23,000 lbf) at 15.3 km/h (9.5 mph)
Operators Córas Iompair Éireann
Class C2a, later B, later 113
Numbers 1100–1101, later B113–B114
Withdrawn 1971
Disposition One preserved, Ulster Folk and Transport Museum

The Córas Iompair Éireann 113 class locomotives were the first mainline diesel locomotives used in Ireland, being built in January 1950 and October 1951 by CIÉ at their Inchicore Works. They were fitted with Sulzer 6LDA28 engines of 915 hp (682 kW) (uprated to 960 hp or 720 kW in 1956), with four Metropolitan-Vickers MV157 traction motors. They were of Bo-Bo wheel arrangement, weighed 80 tonnes and had a maximum speed of 90 km/h (56 mph). They were initially numbered 1100–1101 in the steam locomotive number series (and designated class C2a), but were subsequently renumbered B113–B114 in 1957.

Locomotives B114 and A37 at the Inchicore Works, Dublin in 1963
B113 On display at the UFTM

They were intended for mixed traffic duties, hauling both freight and passenger trains. When they were first introduced, they were used on some of the express passenger duties between Dublin and Cork. However, with the arrival of production diesel locomotives (the 001 and 101 Classes) from 1955, these two locomotives were used more for freight work, mostly in the area around Dublin.

They suffered from a recurring brake fault and following a serious incident in August 1971 when 114 ran away while working a goods train, both locomotives were withdrawn for modifications to be made to their brakes. In fact, 114 was never reinstated and 113 only worked for a few months at the end of 1974 before it too was stored again. Both were then used at Inchicore Works as part of a sound barrier with 101 Class locomotives. B113 was presented to the Ulster Folk and Transport Museum in May 2011, but 114 was not so lucky and was scrapped in March 1995.


B113 was stored at the RPSI's depot in Whitehead, County Antrim and there received a cosmetic overhaul along with fellow diesel, NIR 101 Class no. 102. In January 2012, the two were taken to the Ulster Folk and Transport Museum, under cover of night. The two locos were (And are) incapable of running under their own power, and so 2 NIR 111 class locomotives provided the motive power, in the form of 112 and 113.


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