Whilst the Isle of Man Railway was a remains primarily a steam-operated railway system, there have been various other methods of motive power employed over the years.  It is interesting to note that it wasn’t until the arrival of the railcars from the County Donegal Railway in 1961 that the railway branched out into anything other than steam, although alternative motive power had been mooted for several years previously.  More recently the name Viking was finally allocated in 1993 when No. 17 was inaugurated (the name having previously been intended for No. 3 which of course became Pender in honour of a company director) and the latest addition has been No. 18 Ailsa, finally making the fleet numbers of the railcars consistent - their original numbers of 19 and 20 were retained when they arrived on the island.