Aero Diesels
A couple of years ago I stumbled on a website for a manufacturer of diesel aero engines. I'm not in aviation but years ago I had a small mining operation and grew to love both diesels (reliability & durability) and light aircraft, but never in combination as far as I know!
The arguments proposed by the manufacturers seemed quite convincing when I read them at the time and naturally they indicated that certification was just around the corner (they would of course: I've owned an R&D and manufacturing business too...). I also seem to recall that one of the WW2 German aviation manufacturers installed a diesel - but maybe they're common and I'm just ignorant.
Anyone care to comment on the principle and/or the specific case I recall? Anyone testing anything? Now I'll nip off and search for the website again.