Thanks for the info NE, both vessel’s interesting in their own right however the “Lister” more so for me as her engine had the hands of Sir Harry Ricardo on her engine you might say, not literally of course but nevertheless the tuning mind of a truly brilliant Engineer who was called to get the best out of various engines and their systems during his lifetime.
He must have been the only Engineer to have his own Motor Yacht powered by Gas Turbine Engines when he converted an ex Service triple screwed 60ft Pinnace Post War. He retained the Centre Perkins 6cy but fitted Gas Turbines to the Wing Shafts.
I drove over to Preston Docks to have a look at her many years ago, she still exists I understand but without the G.T,s and is under refit I last heard.
I wonder what Sir Harry would make of the new thinking of partially Coal Fuelled Jet Engines? “Coal is still King”