Further experiments were conducted over the years on the Waterford and Limerick, Great Southern and Western, Belfast and Northern Counties and Listowel and Ballybunion Railways, but there is no evidence of routine use.
[5] The winter of 1946–1947 saw severe coal shortages that led to the cancellation of most CIÉ rail services[6] and further strengthened the case for an alternative fuel.
In July 1948, former Great Western Railway general manager James Milne was appointed by the Irish government to review rail, road and canal transport in the country.
Milne was supported by three assistants and three further technical assessors; Oliver Bulleid, then still chief mechanical engineer of British Railways Southern Region, was amongst the latter.
[11] Difficulties with steaming led to the addition of a forced-draught fan, which was mounted on a wagon behind the tender and driven by a Leyland bus engine.
[18] Bulleid intended to make use of sleeve valves, as he had done in the Leader, and sought advice from Sir Harry Ricardo on the matter.
[19] However, he ultimately reverted to piston valves in the face of political pressure to make progress on the locomotive's development.
Hot gases were ducted from the smokeboxes to feedwater heaters and then to induction fans (driven by steam turbines) before exhausting from the locomotive's two chimneys.
[21] The overall layout resembled a Double Fairlie, although CC1 differed in having only one boiler and in having its buffers and drawgear mounted on the locomotive frame, rather than on the bogies.
Finally, there were changes associated with the difference in fuel; the coal-fired Leader did not require the augers, mechanical stokers and induced-draught fans fitted to CC1.
[28] One run (operating light engine) was made to Mullingar and back, on the former Midland Great Western main line, but ride quality suffered on this route's sharp curves.
Issues also arose with leakage of the drive chains' oil baths, a problem common to multiple Bulleid designs.
[33] On the basis of the trial results, John Click developed a design for a single-ended version of CC1, which would address space, weight and other problems experienced with the CC1 configuration.
[34] After the end of the testing programme, CC1 reportedly made a few trips hauling transfer freight trains in the Dublin area.