An invaluable source of information on model engines in general and French model engines in particular is the assemblage of very interesting summaries to be found on Michel Rosanoff's "Engine History" thread in the "Vintage Models" section of the outstanding Retroplane forum. This website is primarily concerned with large scale vintage gliders, but the forum includes threads on many topics, including this one.

Although presented in French, the information on Michel's thread may easily be rendered into comprehensible English using current translation software. Many high quality images of very rare French engines appear on this site, along with a good deal of information and related images about engines from other countries.

I have frequently consulted Michel’s outstanding work during the preparation of various articles on French model engines, also periodically using images extracted from the thread with Michel’s kind permission. A visit is highly recommended!