Originally Posted By: walpolla
bcowanwheels says:
"airplanes are hi-compression and run very hi octane fuel plus there tuned to run with exhaust that way. there like a race engine with open headers."
Then Mean buzzen half dozen A.K.A. Hank says:
"Airplane engines in general are low compression air-cooled engines."
Now it is obvious even to my limited intellect, that you cannot both be right.
I am more confused than ever. Perhaps it is time for me to give Google a workout and see what HE says.

regards,Rod.


Just wondering what google has said?

I am an A&P mechanic, I have worked on the smaller air cooled low performance engines in school & my first job was fueling airplanes, then later was working on them, so I know first hand.

I started working on aircraft in 1988,even then, there was only 100 low lead fuel available , never seen 130 octane even available to this day.

A Cessna 150 has a Continental 0-200, 200 cubic inch air cooled opposed 4 cylinder engine, nothing high performance with that engine.
The cylinder head design is horrendous, the exhaust looks just as bad.
That is just one example, there are plenty more.

MBHD


12 port SDS EFI