Originally Posted by
Lake1952
Speaking of fuel. I am fairly certain that those radial engines were not originally designed to burn today's available 100LL. What about that?
Virtually every round engine alive today flies with 100LL and with FAA approval.
I was aghast when NTSB guy said, "I'm not sure, but I think 100LL is approved for reciprocating engines blah blah blah." What cave has he lived in for the last 30 years?