Hi Dick
I don't know of the story but in case you haven't seen either of these I found this article about a French kit plane that used a VW car engine (in the Broken Hill newspaper Barrier Miner on 23 December 1954). Perhaps it's possible your aviator flew one of these?
23 Dec 1954 - Flying at 5d. Mile
Also on Wikipedia there's a big list of aircraft that have used VW engines. Perhaps one of these relates to the story? (scroll down close to the bottom)
Volkswagen air-cooled engine - Wikipedia, the free encyclopedia
regards
Ren