“As a young boy I had a plastic wankel rotary engine model which fascinated me.”
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You mean the clear plastic one, lubricated with graphite?
Run by C or D batteries?
I had it too! Had a V-8 as well, I think they called it the ‘Visible V-8’
Both still on sale, largely unchanged.
48 bucks on Amazon.
I recall graphite lube. I don’t recall the battery cell size. If you use a common search engine it is the one which comes up for ‘8201-600 model engine.’