Captain Howey had often experimented with alternatives to steam in order to make the winter timetable more economical, and in 1929 the Theakston-Ford petrol locomotive appeared for its brief life on the Railway.
In 1931, Howey converted his 1914 Rolls-Royce Silver Ghost into a locomotive that survived until 1961. After running trials with the Ravenglass and Eskdale Railways locomotive, Shelagh of Eskdale the RH&DR duly ordered their own mainline diesel.