Re: ROTARY VALVE MOTORS??? What is it?

[frankr]

Improvements in spring metals made reeds practical and more or less universal. In addition to the wear and fit problem, rotary valves allow backfiring through the carburetor and sometimes fires result. Related to the subject were the Martin Motors with cam operated poppet valves. They were notorious for fires resulting from backfiring through the carburetor (combined with leaky gas tanks). But they were very good motors, otherwise.