The
Córas Iompair Éireann 421 Class was a railway
locomotive
A locomotive is a rail transport, rail vehicle that provides the motive power for a train. Traditionally, locomotives pulled trains from the front. However, Push–pull train, push–pull operation has become common, and in the pursuit for ...
, built by the CIÉ at
Inchicore Works between 1962–1963 and designed for branch line traffic use and shunting.
History
The 421 Class was a larger development of the earlier
401 Class, and were fitted with a Maybach MD220 engine of with
diesel hydraulic transmission via a
Mekydro KL64U transmission. Unlike the earlier E401 class, these locomotives were fitted for multiple operation. They were of C
wheel arrangement
In rail transport, a wheel arrangement or wheel configuration is a system of classifying the way in which wheels are distributed under a locomotive. Several notations exist to describe the wheel assemblies of a locomotive by type, position, and c ...
.

The first of the class made its debut in early October 1962 on pilot duties in the Dublin area and although they had a design maximum speed of , experience (notably the derailment of a trial train hauled by E421) showed that they did not ride well when travelling at speeds over and so henceforth were limited to that speed and used simply for shunting duties instead. They were numbered E421–E434, and were withdrawn from service between 1979 and 1983.
Preservation
Three of these locomotives have been preserved, as follows:
* E421 and E432: Owned by and based at the
Downpatrick and County Down Railway
The Downpatrick and County Down Railway (DCDR) is a Track gauge in Ireland, 5 foot, 3 inch (1,600 mm) Track gauge, gauge heritage railway in County Down, Northern Ireland. It is operated by volunteers and runs passenger trains using Steam loco ...
,
Northern Ireland
Northern Ireland ( ; ) is a Countries of the United Kingdom, part of the United Kingdom in the north-east of the island of Ireland. It has been #Descriptions, variously described as a country, province or region. Northern Ireland shares Repub ...
.
Both locos are currently stored out of traffic.
* E428 had recently moved from Inchicore Works to
Dunsandle, County Galway under private ownership.
Model
The E421 was available as a resin model from "Q Kits", but this company is no longer trading as the owner has retired.
References
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*
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External links
Eiretrains - Irish LocomotivesE428 at Dunsandle
{{Ireland Diesel Locomotives
Iarnród Éireann locomotives
Diesel–hydraulic locomotives
C locomotives
5 ft 3 in gauge locomotives
Diesel locomotives of Ireland
Railway locomotives introduced in 1962
Shunting locomotives